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Hurricane Laura Public Advisory - MAXIMUM SUSTAINED WINDS...150 MPH

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  • Hurricane Laura Public Advisory - MAXIMUM SUSTAINED WINDS...150 MPH


    Tropical Depression 13 formed late Wednesday with it projected to grow into a tropical storm and head toward Florida over the weekend.

    In the 11 p.m. update from the National Hurricane Center, the system was located 1,035 miles east-southeast of the northern Leeward Islands with maximum sustained winds of 35 mph moving west-northwest at 20 mph.


    https://www.orlandosentinel.com/weat...lorida-in-cone

  • #2
    Hurricane Laura Public Advisory


    000
    WTNT33 KNHC 261150
    TCPAT3

    BULLETIN
    Hurricane Laura Intermediate Advisory Number 26A
    NWS National Hurricane Center Miami FL AL132020
    700 AM CDT Wed Aug 26 2020

    ...LAURA STRENGTHENS INTO A MAJOR HURRICANE...
    ...POTENTIALLY CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH
    FLOODING EXPECTED ALONG THE NORTHWEST GULF COAST TONIGHT...
    ...STEPS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO
    COMPLETION IN THE NEXT FEW HOURS...



    SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION
    ----------------------------------------------
    LOCATION...26.4N 91.4W
    ABOUT 280 MI...450 KM SSE OF LAKE CHARLES LOUISIANA
    ABOUT 290 MI...465 KM SE OF GALVESTON TEXAS
    MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H
    PRESENT MOVEMENT...NW OR 310 DEGREES AT 15 MPH...24 KM/H
    MINIMUM CENTRAL PRESSURE...963 MB...28.44 INCHES


    WATCHES AND WARNINGS
    --------------------
    CHANGES WITH THIS ADVISORY:

    None

    SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

    A Storm Surge Warning is in effect for...
    * Freeport Texas to the Mouth of the Mississippi River

    A Hurricane Warning is in effect for...
    * San Luis Pass Texas to Intracoastal City Louisiana

    A Tropical Storm Warning is in effect for...
    * Sargent Texas to San Luis Pass
    * East of Intracoastal City Louisiana to the Mouth of the
    Mississippi River

    A Storm Surge Watch is in effect for...
    * Mouth of the Mississippi River to Ocean Springs Mississippi
    * Lake Pontchartrain, Lake Maurepas, and Lake Borgne

    A Hurricane Watch is in effect for...
    * East of Intracoastal City to west of Morgan City Louisiana

    A Storm Surge Warning means there is a danger of life-threatening
    inundation, from rising water moving inland from the coastline in
    the indicated locations. For a depiction of areas at risk, please
    see the National Weather Service Storm Surge Watch/Warning Graphic,
    available at hurricanes.gov. This is a life-threatening situation.
    Persons located within these areas should take all necessary
    actions to protect life and property from rising water and the
    potential for other dangerous conditions. Promptly follow
    evacuation and other instructions from local officials.

    A Hurricane Warning means that hurricane conditions are expected
    somewhere within the warning area. Preparations to protect life
    and property should be rushed to completion.

    A Storm Surge Watch means there is a possibility of life-
    threatening inundation from rising water moving inland from the
    coastline in the indicated locations.

    A Hurricane Watch means that hurricane conditions are possible
    within the watch area.

    A Tropical Storm Warning means that tropical storm conditions are
    expected somewhere within the warning area.

    For storm information specific to your area, including possible
    inland watches and warnings, please monitor products issued by your
    local National Weather Service forecast office.


    DISCUSSION AND OUTLOOK
    ----------------------
    At 700 AM CDT (1200 UTC), the eye of Hurricane Laura was located
    near latitude 26.4 North, longitude 91.4 West. Laura is moving
    toward the northwest near 15 mph (24 km/h) and this general motion
    should continue today, followed by a north-northwestward motion
    tonight. On the forecast track, Laura should approach the Upper
    Texas and southwest Louisiana coasts this evening and move inland
    near those areas tonight or Thursday morning.

    Data from NOAA and Air Force Hurricane Hunter aircraft indicate
    that maximum sustained winds have increased to near 115 mph (185
    km/h) with higher gusts. Laura is a dangerous category 3 hurricane
    on the Saffir-Simpson Hurricane Scale, and is forecast to continue
    strengthening into a category 4 hurricane later today. Rapid
    weakening is expected after Laura makes landfall.

    Laura is a large hurricane. Hurricane-force winds extend outward
    up to 70 miles (110 km) from the center and tropical-storm- force
    winds extend outward up to 175 miles (280 km)
    . Buoy 42395, located
    just east of Laura's eye, recently reported a sustained wind of 74
    mph (119 km/h) and a wind gust of 107 mph (172 km/h) and a wave
    height of 37 feet (11 meters).


    The latest minimum central pressure estimated from NOAA and Air
    Force reconnaissance aircraft data is 963 mb (28.44 inches).


    HAZARDS AFFECTING LAND
    ----------------------
    Key messages for Laura can be found in the Tropical Cyclone
    Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC.

    Storm surge and tropical-storm-force winds will arrive within the
    warning areas well in advance of Laura's center later today. All
    preparations to protect life and property should be rushed to
    completion in the next few hours.


    STORM SURGE: The combination of a dangerous storm surge and the
    tide will cause normally dry areas near the coast to be flooded by
    rising waters moving inland from the shoreline. The water could
    reach the following heights above ground somewhere in the indicated
    areas if the peak surge occurs at the time of high tide...

    Sea Rim State Park to Intracoastal City including Sabine Lake and
    Calcasieu Lake...10-15 ft
    Intracoastal City to Morgan City including Vermilion Bay...8-12 ft
    Port Bolivar to Sea Rim State Park...6-9 ft
    Morgan City to Mouth of the Mississippi River...4-7 ft
    San Luis Pass to Port Bolivar...3-5 ft
    Galveston Bay...3-5 ft
    Mouth of the Mississippi River to Ocean Springs including Lake
    Borgne...2-4 ft
    Lake Pontchartrain and Lake Maurepas...2-4 ft
    Freeport to San Luis Pass...2-4 ft

    The deepest water will occur along the immediate coast near and to
    the right of the landfall location, where the surge will be
    accompanied by large and destructive waves. This storm surge could
    penetrate up to 30 miles inland from the immediate coastline in
    southwestern Louisiana and far southeastern Texas.

    Surge-related flooding depends on the relative timing of the surge
    and the tidal cycle, and can vary greatly over short distances. For
    information specific to your area, please see products issued by
    your local National Weather Service forecast office.

    WIND: Hurricane conditions are expected in the hurricane warning
    area tonight and Thursday. Tropical storm conditions are
    expected to reach the coast in the hurricane warning area late
    today or tonight, and are expected in the tropical storm
    warning area tonight and Thursday.

    Hurricane-force winds and damaging wind gusts are also expected to
    spread well inland into portions of eastern Texas and western
    Louisiana early Thursday.

    RAINFALL: From this afternoon through Friday, Laura is expected to
    produce rainfall totals of 5 to 10 inches, with isolated maximum
    amounts of 15 inches across portions of the northwestern Gulf Coast
    from western Louisiana to far eastern Texas, and northward into much
    of Arkansas. Over the lower to middle Mississippi Valley from
    central Louisiana into western Tennessee and Kentucky, and
    southeastern Missouri, 2 to 4 inches of rainfall with isolated
    totals of 6 inches are expected. This rainfall will cause
    widespread flash and urban flooding, small streams to overflow their
    banks, and minor to isolated moderate river flooding.

    By late Friday into Saturday, portions of the Tennessee and Ohio
    Valley could see 2 to 4 inches with locally higher amounts as
    tropical moisture from Laura moves through the region. This
    rainfall could lead to localized flash and urban flooding along
    small streams.

    TORNADOES: A few tornadoes are expected this evening through
    tonight over Louisiana, far southeast Texas, and southwestern
    Mississippi. The risk for a few tornadoes should continue into
    Thursday across Louisiana, Arkansas, and western Mississippi.

    SURF: Swells produced by Laura are affecting the U.S. Gulf coast
    from the west coast of Florida to Louisiana and are expected to
    reach the coast of Texas and northeastern Mexico today. These
    swells are likely to cause life-threatening surf and rip current
    conditions. Please consult products from your local weather office.


    NEXT ADVISORY
    -------------
    Next complete advisory at 1000 AM CDT.

    $$
    Forecaster Brown

    https://www.nhc.noaa.gov/text/refres.../261150.shtml?

    ===============================================




    https://cdn.star.nesdis.noaa.gov/GOE.../1000x1000.jpg
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela

    Comment


    • #3
      Hurricane Laura strengthens to Category 3

      Laura grew nearly 70% in power in just 24 hours
      ...
      By Associated Press | August 26, 2020 at 5:03 AM CDT - Updated August 26 at 9:11 AM

      GALVESTON, Texas (AP) — Hurricane Laura is forecast to rapidly power up into a “catastrophic” Category 4 hurricane, even stronger than previously expected, as it churns toward Texas and Louisiana, swirling wind and water over much of the Gulf of Mexico.
      ...
      “Some areas, when they wake up Thursday morning, they’re not going to believe what happened,” said Stacy Stewart, a senior hurricane specialist.

      “We could see storm surge heights more than 15 feet in some areas,” Stewart said. “What doesn’t get blown down by the wind could easily get knocked down by the rising ocean waters pushing well inland.”
      ...
      “Heed the advice of your local authorities. If they tell you to go, go! Your life depends on it today,” said Joel Cline, tropical program coordinator at the National Weather Service. “It’s a serious day and you need to listen to them.”
      ...
      In the largest U.S. evacuation during this pandemic era, more than half a million people were ordered Tuesday to flee from their homes near the Texas-Louisiana state line, including the Texas cities of Beaumont, Galveston and Port Arthur, and the low-lying Calcasieu and Cameron parishes in southwestern Louisiana, where forecasters said storm surge topped by waves could submerge whole communities.
      ...
      "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
      -Nelson Mandela

      Comment


      • #4

        502
        WTNT33 KNHC 261451
        TCPAT3

        BULLETIN
        Hurricane Laura Advisory Number 27
        NWS National Hurricane Center Miami FL AL132020
        1000 AM CDT Wed Aug 26 2020

        ...LAURA CONTINUES TO RAPIDLY STRENGTHEN AND IT IS EXPECTED TO
        BECOME AN EXTREMELY DANGEROUS CATEGORY 4 HURRICANE...
        ...CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING
        EXPECTED ALONG THE NORTHWEST GULF COAST TONIGHT...
        ...ONLY A FEW HOURS REMAIN TO PROTECT LIFE AND PROPERTY...



        SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION
        -----------------------------------------------
        LOCATION...27.0N 92.0W
        ABOUT 225 MI...365 KM SSE OF LAKE CHARLES LOUISIANA
        ABOUT 235 MI...375 KM SE OF GALVESTON TEXAS
        MAXIMUM SUSTAINED WINDS...125 MPH...205 KM/H
        PRESENT MOVEMENT...NW OR 310 DEGREES AT 16 MPH...26 KM/H
        MINIMUM CENTRAL PRESSURE...956 MB...28.23 INCHES


        WATCHES AND WARNINGS
        --------------------
        CHANGES WITH THIS ADVISORY:

        None

        SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

        A Storm Surge Warning is in effect for...
        * Freeport Texas to the Mouth of the Mississippi River

        A Hurricane Warning is in effect for...
        * San Luis Pass Texas to Intracoastal City Louisiana

        A Tropical Storm Warning is in effect for...
        * Sargent Texas to San Luis Pass
        * East of Intracoastal City Louisiana to the Mouth of the
        Mississippi River

        A Storm Surge Watch is in effect for...
        * Mouth of the Mississippi River to Ocean Springs Mississippi
        * Lake Pontchartrain, Lake Maurepas, and Lake Borgne

        A Hurricane Watch is in effect for...
        * East of Intracoastal City to west of Morgan City Louisiana

        A Storm Surge Warning means there is a danger of life-threatening
        inundation, from rising water moving inland from the coastline in
        the indicated locations. For a depiction of areas at risk, please
        see the National Weather Service Storm Surge Watch/Warning Graphic,
        available at hurricanes.gov. This is a life-threatening situation.
        Persons located within these areas should take all necessary
        actions to protect life and property from rising water and the
        potential for other dangerous conditions. Promptly follow
        evacuation and other instructions from local officials.

        A Hurricane Warning means that hurricane conditions are expected
        somewhere within the warning area. Preparations to protect life
        and property should be rushed to completion.

        A Storm Surge Watch means there is a possibility of life-
        threatening inundation from rising water moving inland from the
        coastline in the indicated locations.

        A Hurricane Watch means that hurricane conditions are possible
        within the watch area.

        A Tropical Storm Warning means that tropical storm conditions are
        expected somewhere within the warning area.

        For storm information specific to your area, including possible
        inland watches and warnings, please monitor products issued by your
        local National Weather Service forecast office.


        DISCUSSION AND OUTLOOK
        ----------------------
        At 1000 AM CDT (1500 UTC), the eye of Hurricane Laura was located
        near latitude 27.0 North, longitude 92.0 West. Laura is moving
        toward the northwest near 16 mph (26 km/h). A gradual turn toward
        the north-northwestward and north is expected later today and
        tonight. On the forecast track, Laura will approach the Upper
        Texas and southwest Louisiana coasts this evening and move inland
        within that area tonight.
        The center of Laura is forecast to move
        over northwestern Louisiana tomorrow, across Arkansas Thursday
        night, and over the mid-Mississippi Valley on Friday.

        Data from NOAA and Air Force Hurricane Hunter aircraft indicate
        that maximum sustained winds have increased to near 125 mph
        (205 km/h) with higher gusts.
        Laura is a category 3 hurricane on
        the Saffir-Simpson Hurricane Wind Scale. Additional strengthening
        in expected and Laura is forecast to become a category 4 hurricane
        this afternoon.
        Rapid weakening is expected after Laura makes
        landfall.

        Hurricane-force winds extend outward up to 70 miles (110 km) from
        the center and tropical-storm-force winds extend outward up to 175
        miles (280 km).


        The latest minimum central pressure estimated from reconnaissance
        aircraft data is 956 mb (28.23 inches).


        HAZARDS AFFECTING LAND
        ----------------------
        Key messages for Laura can be found in the Tropical Cyclone
        Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC.

        Storm surge and tropical-storm-force winds will arrive within the
        warning areas well in advance of Laura's center later today. All
        preparations to protect life and property should be rushed to
        completion in the next few hours.

        STORM SURGE: The combination of a dangerous storm surge and the
        tide will cause normally dry areas near the coast to be flooded by
        rising waters moving inland from the shoreline. The water could
        reach the following heights above ground somewhere in the indicated
        areas if the peak surge occurs at the time of high tide...

        Johnson Bayou LA to Rockefeller Wildlife Refuge including Calcasieu
        Lake...15-20 ft
        Sea Rim State Park TX to Johnson Bayou LA including Sabine
        Lake...10-15 ft
        Rockefeller Wildlife Refuge to Intracoastal City LA...10-15 ft
        Intracoastal City LA to Morgan City including Vermilion Bay...8-12
        ft
        Port Bolivar TX to Sea Rim State Park...6-9 ft
        Morgan City LA to Mouth of the Mississippi River...4-7 ft
        Freeport TX to Port Bolivar including Galveston Bay...2-4 ft
        Mouth of the Mississippi River to Ocean Springs MS including Lake
        Borgne...2-4 ft
        Lake Pontchartrain and Lake Maurepas...2-4 ft

        The deepest water will occur along the immediate coast near and to
        the right of the landfall location, where the surge will be
        accompanied by large and destructive waves.

        Unsurvivable storm surge with large and destructive waves will cause
        catastrophic damage from Sea Rim State Park, Texas, to Intracoastal
        City, Louisiana, including Calcasieu and Sabine Lakes.
        This storm
        surge could penetrate up to 30 miles inland from the immediate
        coastline in southwestern Louisiana and far southeastern Texas.


        Surge-related flooding depends on the relative timing of the surge
        and the tidal cycle, and can vary greatly over short distances. For
        information specific to your area, please see products issued by
        your local National Weather Service forecast office.

        WIND: Hurricane conditions are expected in the hurricane warning
        area tonight and Thursday, with catastrophic wind damage expected
        where Laura's eyewall makes landfall tonight.
        Tropical storm
        conditions are expected to reach the coast in the hurricane warning
        area late today or tonight, and are expected in the tropical storm
        warning area tonight and Thursday.

        Hurricane-force winds and damaging wind gusts are also expected to
        spread well inland into portions of eastern Texas and western
        Louisiana early Thursday.


        RAINFALL: From this afternoon through Friday, Laura is expected to
        produce rainfall totals of 5 to 10 inches, with isolated maximum
        amounts of 15 inches across portions of the northwestern Gulf Coast
        from western Louisiana to far eastern Texas, and northward into much
        of Arkansas. This rainfall will cause widespread flash and urban
        flooding, small streams and creeks to overflow their banks, and
        minor to isolated moderate freshwater river flooding.

        By Friday into Saturday, Laura will produce rainfall totals of 2 to
        4 inches, with isolated maximum amounts of 6 inches across the
        mid-Mississippi and portions of the Lower Ohio and Lower Tennessee
        Valleys. This rainfall may lead to localized flash and urban
        flooding and rapid rises on small streams.

        TORNADOES: A few tornadoes are expected this afternoon through
        tonight over Louisiana, far southeast Texas, and southwestern
        Mississippi. The risk for a few tornadoes should continue into
        Thursday across Louisiana, Arkansas, and western Mississippi.

        SURF: Swells produced by Laura are affecting the entire U.S. Gulf
        coast from the west coast of Florida to Texas and northeastern
        Mexico These swells are likely to cause life-threatening surf and
        rip current conditions. Please consult products from your local
        weather office.


        NEXT ADVISORY
        -------------
        Next intermediate advisory at 100 PM CDT.
        Next complete advisory at 400 PM CDT.



        --------------------------------------------------------------


        000
        WTNT43 KNHC 261452
        TCDAT3

        Hurricane Laura Discussion Number 27

        NWS National Hurricane Center Miami FL AL132020
        1000 AM CDT Wed Aug 26 2020

        Laura has become a very powerful hurricane this morning. The
        satellite presentation has continued to improve with the eye
        becoming better defined, and cloud tops colder than -70C in the
        surrounding ring of deep convection. Both NOAA and Air Force
        hurricane hunter aircraft have provided valuable data this morning.
        The NOAA P-3 aircraft reported a peak flight-level wind of 125 kt at
        8000 ft, and a peak SFMR wind of 104 kt, while the Air Force crew
        has observed peak 700-mb flight-level winds of 121 kt and peak SFMR
        winds of 104 kt. The lastest minimum pressure estimated from
        aircraft data is 956 mb, indicating a pressure drop of 27 mb over
        the past 12 hours. Based on the aircraft data, the initial wind
        speed was increased to 100 kt on the 1200 UTC intermediate advisory,
        and is now set at 110 kt based on the latest flight-level and SFMR
        winds.

        Laura is likely to continue strengthening today while it moves over
        warm waters of the northwestern Gulf of Mexico and the vertical
        wind shear remains low. Laura's intensity could level-off by this
        evening due to the possibility of an eyewall replacement cycle
        and the expected increase in shear around the time of landfall.
        Even if the rate of strengthening eases, Laura is expected to be
        an extremely powerful category 4 hurricane when it reaches the
        northwestern Gulf coast. After landfall, rapid weakening will
        occur, but Laura will bring a swath of damaging winds well inland
        over western Louisiana and eastern Texas. The UKMET and ECMWF models
        suggest that there is some chance that Laura re-intensifies as a
        tropical cyclone off the mid-Atlantic coast, but given the
        uncertainties at that time range the forecast continues to show it
        as a post-tropical cyclone at days 4 and 5.

        Laura is moving northwestward at about 13 kt. A gradual turn toward
        the north-northwest and north are expected within the next 12-18
        hours as the hurricane moves around the western portion of a mid-
        level ridge that extends from the western Atlantic into the
        southeastern United States. This motion will bring the center of
        Laura onshore in southwestern Louisiana or extreme eastern Texas
        tonight. By Thursday night, Laura is forecast to turn northeastward,
        and then east-northeastward on Friday as it becomes embedded in the
        mid-latitude westerlies. The dynamical track models are in good
        agreement, and little adjustment to the previous NHC forecast track
        was required.

        Laura is a large hurricane and users are reminded to not focus on
        the precise track forecast since wind, storm surge, and rainfall
        hazards extend far from the center.


        Key Messages:

        1. Unsurvivable storm surge with large and destructive waves will
        cause catastrophic damage from Sea Rim State Park, Texas, to
        Intracoastal City, Louisiana, including Calcasieu and Sabine Lakes.
        This surge could penetrate up to 30 miles inland from the immediate
        coastline. Only a few hours remain to protect life and property and
        all actions should be rushed to completion.

        2. Hurricane-force winds are expected tonight in portions of the
        hurricane warning area from San Luis Pass, Texas, to west of Morgan
        City, Louisiana, with catastrophic wind damage expected where
        Lauras eyewall makes landfall. Hurricane-force winds and widespread
        damaging wind gusts will spread well inland across portions of
        eastern Texas and western Louisiana early Thursday.

        3. Widespread flash flooding along small streams, urban areas, and
        roadways is expected to begin this afternoon into Thursday from far
        eastern Texas, across Louisiana and Arkansas. This will also lead
        to minor to isolated moderate freshwater river flooding. The heavy
        rainfall threat and localized flash and urban flooding potential
        will spread northeastward into the middle-Mississippi, lower Ohio
        and Tennessee Valleys Friday night and Saturday.

        FORECAST POSITIONS AND MAX WINDS

        INIT 26/1500Z 27.0N 92.0W 110 KT 125 MPH
        12H 27/0000Z 28.5N 93.2W 125 KT 145 MPH
        24H 27/1200Z 31.0N 93.8W 75 KT 85 MPH
        36H 28/0000Z 33.7N 93.5W 40 KT 45 MPH...INLAND
        48H 28/1200Z 35.8N 92.2W 25 KT 30 MPH...INLAND
        60H 29/0000Z 37.2N 89.1W 25 KT 30 MPH...INLAND
        72H 29/1200Z 37.6N 83.9W 25 KT 30 MPH...INLAND
        96H 30/1200Z 40.0N 70.0W 40 KT 45 MPH...POST-TROP/EXTRATROP
        120H 31/1200Z 48.0N 55.0W 45 KT 50 MPH...POST-TROP/EXTRATROP

        $$
        Forecaster Brown

        "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
        -Nelson Mandela

        Comment


        • #5
          A hurricane tracker - h/t Michael Coston

          Comment


          • #6


            000 WTNT63
            KNHC 261857
            TCUAT3

            Hurricane Laura Tropical Cyclone Update NWS National Hurricane Center Miami FL AL132020 200 PM CDT Wed Aug 26 2020 ...200 PM

            CDT POSITION UPDATE... ...

            CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING

            EXPECTED ALONG THE NORTHWEST GULF COAST TONIGHT...

            ...LITTLE TIME REMAINS TO PROTECT LIFE AND PROPERTY...

            Water levels are beginning to rise along the coast of Louisiana. A National Ocean Service water level station at Eugene Island, Louisiana, recently reported about 3.2 feet of inundation above ground level.

            The Eugene Island NOS station also recently measured sustained winds of 35 mph (56 km/h) and a gust to 41 mph (66 km/h).

            more..

            https://www.nhc.noaa.gov/text/refres.../261857.shtml?

            Comment


            • #7


              400 PM CDT Wed Aug 26 2020

              MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H

              Unsurvivable storm surge with large and destructive waves will cause catastrophic damage from Sea Rim State Park, Texas, to Intracoastal City, Louisiana, including Calcasieu and Sabine Lakes. This surge could penetrate up to 40 miles inland from the immediate coastline, and flood waters will not fully recede for several days after the storm.

              https://www.nhc.noaa.gov/text/refres.../262050.shtml?

              Comment


              • #8
                National Weather Service
                @NWS
                ?
                17m

                If you were not ordered to evacuate, be prepared to take shelter in a sturdy structure in an interior room away from windows on the lowest floor possible. Dangerous winds will last for hours in many locations tonight and/or tomorrow.

                http://weather.gov for the latest.

                "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
                -Nelson Mandela

                Comment


                • #9
                  000
                  WTNT33 KNHC 262342
                  TCPAT3

                  BULLETIN
                  Hurricane Laura Intermediate Advisory Number 28A
                  NWS National Hurricane Center Miami FL AL132020
                  700 PM CDT Wed Aug 26 2020

                  ...WINDS INCREASING AS EXTREMELY DANGEROUS HURRICANE LAURA TAKES AIM
                  AT THE NORTHWEST GULF COAST...
                  ...CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING
                  EXPECTED ALONG THE NORTHWEST GULF COAST TONIGHT...



                  SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION
                  ----------------------------------------------
                  LOCATION...28.4N 92.9W
                  ABOUT 120 MI...190 KM S OF LAKE CHARLES LOUISIANA
                  ABOUT 120 MI...190 KM SSE OF PORT ARTHUR TEXAS
                  MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H
                  PRESENT MOVEMENT...NNW OR 330 DEGREES AT 15 MPH...24 KM/H
                  MINIMUM CENTRAL PRESSURE...940 MB...27.76 INCHES


                  WATCHES AND WARNINGS
                  --------------------
                  CHANGES WITH THIS ADVISORY:

                  None.

                  SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

                  A Storm Surge Warning is in effect for...
                  * Freeport Texas to the Mouth of the Mississippi River

                  A Hurricane Warning is in effect for...
                  * San Luis Pass Texas to Intracoastal City Louisiana

                  A Tropical Storm Warning is in effect for...
                  * Sargent Texas to San Luis Pass
                  * East of Intracoastal City Louisiana to the Mouth of the
                  Mississippi River

                  A Hurricane Watch is in effect for...
                  * East of Intracoastal City to west of Morgan City Louisiana

                  A Storm Surge Warning means there is a danger of life-threatening
                  inundation, from rising water moving inland from the coastline in
                  the indicated locations. For a depiction of areas at risk, please
                  see the National Weather Service Storm Surge Watch/Warning Graphic,
                  available at hurricanes.gov. This is a life-threatening situation.
                  Persons located within these areas should take all necessary
                  actions to protect life and property from rising water and the
                  potential for other dangerous conditions. Promptly follow
                  evacuation and other instructions from local officials.

                  A Hurricane Warning means that hurricane conditions are expected
                  somewhere within the warning area. Preparations to protect life
                  and property should be rushed to completion.

                  A Hurricane Watch means that hurricane conditions are possible
                  within the watch area.

                  A Tropical Storm Warning means that tropical storm conditions are
                  expected somewhere within the warning area.

                  For storm information specific to your area, including possible
                  inland watches and warnings, please monitor products issued by your
                  local National Weather Service forecast office.


                  DISCUSSION AND OUTLOOK
                  ----------------------
                  At 700 PM CDT (0000 UTC), the eye of Hurricane Laura was located
                  near latitude 28.4 North, longitude 92.9 West. Laura is moving
                  toward the north-northwest near 15 mph (24 km/h). A turn toward the
                  north is expected overnight, and a northward motion should continue
                  on Thursday. A northeastward to east-northeastward motion is
                  expected Thursday night and Friday. On the forecast track, Laura
                  will approach the upper Texas and southwest Louisiana coasts this
                  evening and move inland within that area tonight. The center of
                  Laura is forecast to move over northwestern Louisiana tomorrow,
                  across Arkansas Thursday night, and over the mid-Mississippi Valley
                  on Friday.

                  Reports from a NOAA Hurricane Hunter aircraft indicate that the
                  maximum sustained winds have increased to near 150 mph (240 km/h)
                  with higher gusts. Laura is an extremely dangerous category 4
                  hurricane on the Saffir-Simpson Hurricane Wind Scale. Some
                  additional strengthening is possible tonight before Laura reaches
                  the northwest Gulf coast overnight. Rapid weakening is expected
                  after Laura moves inland.


                  Hurricane-force winds extend outward up to 60 miles (95 km) from
                  the center and tropical-storm-force winds extend outward up to 205
                  miles (335 km).
                  A sustained wind of 48 mph (78 km/h) was recently
                  reported at Cypremort Point, Louisiana, on Vermilion Bay.

                  The minimum central pressure estimated from NOAA Hurricane Hunter
                  aircraft observations is 940 mb (27.76 inches).


                  HAZARDS AFFECTING LAND
                  ----------------------
                  Key messages for Laura can be found in the Tropical Cyclone
                  Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC.

                  Storm surge and tropical-storm-force winds will arrive within the
                  warning areas well in advance of Laura's center. All preparations
                  to protect life and property should be rushed to completion in the
                  next few hours.

                  STORM SURGE: The combination of a dangerous storm surge and the
                  tide will cause normally dry areas near the coast to be flooded by
                  rising waters moving inland from the shoreline. The water could
                  reach the following heights above ground somewhere in the indicated
                  areas if the peak surge occurs at the time of high tide...

                  Johnson Bayou LA to Rockefeller Wildlife Refuge including Calcasieu
                  Lake...15-20 ft
                  Sea Rim State Park TX to Johnson Bayou LA including Sabine
                  Lake...10-15 ft
                  Rockefeller Wildlife Refuge to Intracoastal City LA...10-15 ft
                  Intracoastal City LA to Morgan City including Vermilion Bay...8-12
                  ft
                  Port Bolivar TX to Sea Rim State Park...6-9 ft
                  Morgan City LA to Mouth of the Mississippi River...4-7 ft
                  Freeport TX to Port Bolivar including Galveston Bay...2-4 ft
                  Mouth of the Mississippi River to Ocean Springs MS including Lake
                  Borgne...1-3 ft
                  Lake Pontchartrain and Lake Maurepas...1-3 ft

                  The deepest water will occur along the immediate coast near and to
                  the right of the landfall location, where the surge will be
                  accompanied by large and destructive waves.

                  Unsurvivable storm surge with large and destructive waves will cause
                  catastrophic damage from Sea Rim State Park, Texas, to Intracoastal
                  City, Louisiana, including Calcasieu and Sabine Lakes. This surge
                  could penetrate up to 40 miles inland from the immediate coastline,
                  and flood waters will not fully recede for several days after the
                  storm.

                  Surge-related flooding depends on the relative timing of the surge
                  and the tidal cycle, and can vary greatly over short distances. For
                  information specific to your area, please see products issued by
                  your local National Weather Service forecast office.

                  WIND: Hurricane conditions are expected in the hurricane warning
                  area tonight and Thursday, with catastrophic wind damage expected
                  where Laura's eyewall moves onshore tonight. Tropical storm
                  conditions are moving onshore along the coast of Louisiana within
                  the tropical storm warning area and are expected to spread
                  northwestward within the warning areas this evening.

                  Hurricane-force winds and damaging wind gusts are also expected to
                  spread well inland into portions of eastern Texas and western
                  Louisiana early Thursday.

                  RAINFALL: From this evening through Friday, Laura is expected to
                  produce the following rainfall totals:

                  Across the northwestern Gulf Coast from far southwest Louisiana and
                  the Golden Triangle of Southeast Texas: 8 to 12 inches with isolated
                  totals of 18 inches.

                  Across central and the rest of western Louisiana into far eastern
                  Texas: 5 to 10 inches with isolated totals of 15 inches.

                  Across much of Arkansas: 3 to 7 inches with isolated totals of 10
                  inches.

                  This rainfall will cause widespread flash and urban flooding, small
                  streams and creeks to overflow their banks, and minor to moderate
                  freshwater river flooding.

                  By Friday into Saturday, Laura is expected to produce the following
                  rainfall totals:

                  Across the mid-Mississippi and portions of the Tennessee Valley,
                  Lower Ohio Valley, and central Appalachians: 2 to 4 inches with
                  isolated maximum amounts of 6 inches.

                  This rainfall may lead to flash and urban flooding and rapid rises
                  on small streams.

                  Across the Mid-Atlantic Region: 1 to 3 inches.

                  TORNADOES: Several tornadoes are expected this evening through
                  tonight over Louisiana, far southeast Texas, and southwestern
                  Mississippi. The risk for a few tornadoes will continue into
                  Thursday across Louisiana, Arkansas, and western Mississippi.

                  SURF: Swells produced by Laura are affecting the U.S. Gulf coast
                  from the west coast of Florida to Texas and northeastern Mexico.
                  These swells are likely to cause life-threatening surf and rip
                  current conditions. Please consult products from your local
                  weather office.


                  NEXT ADVISORY
                  -------------
                  Next complete advisory at 1000 PM CDT.




                  --------------------------------------------------------



                  https://cdn.star.nesdis.noaa.gov/GOE.../1000x1000.jpg
                  "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
                  -Nelson Mandela

                  Comment


                  • #10
                    Hurricane Laura Causes Mississippi River to Flow Backwards

                    August 27, 2020

                    Hurricane Laura is causing the Mississippi River to reverse directions. Take a look.

                    VIDEO: https://weather.com/storms/hurricane...-flow-backward

                    Comment

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