Tags

, , , , , ,

As can be seen anything can happen once they get into the Gulf of Mexico. At 150 mph, Laura was far stronger than the initially predicted 100 mph.

NORTHERN EYEWALL OF LAURA MOVING OVER CAMERON PARISH…
…CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING OCCURING IN SOUTHWESTERN LOUISIANA…
12:00 AM CDT Thu Aug 27
Location: 29.5°N 93.3°W
Moving: NNW at 15 mph
Min pressure: 938 mb
Max sustained: 150 mph

SEE VARIOUS NHC UPDATES 10 pm August 26th to 5 am August 27th Further BELOW

Hurricane Laura is tied with the 1856 Last Island hurricane as the strongest Atlantic hurricane to make landfall in the U.S. state of Louisiana.https://en.wikipedia.org/wiki/Hurricane_Laura

August 23 forecast: https://www.katc.com/weather/2-tropical-systems-could-impact-gulf-coast-on-the-same-day

See Camille 1969 predictions: https://en.wikipedia.org/wiki/Hurricane_Camille

Residents in Hurricane Laura’s Path Prepare for Worst“By Matt Haines August 27, 2020 01:26 AM
https://www.voanews.com/usa/residents-hurricane-lauras-path-prepare-worst

Hurricane Laura Makes Landfall on US Gulf Coast as Powerful Category 4 Storm” By VOA News August 27, 2020 03:33 AM https://www.voanews.com/usa/hurricane-laura-makes-landfall-us-gulf-coast-powerful-category-4-storm

Ahead of Hurricane Laura, Texas Ranchers Move Cattle Out of Harm’s Way” By VOA News August 27, 2020 01:40 AM https://www.voanews.com/usa/ahead-hurricane-laura-texas-ranchers-move-cattle-out-harms-way

Hurricane Audrey was one of the deadliest tropical cyclones in U.S. history, killing at least 416 people in its devastation of the southwestern Louisiana coast in 1957.https://en.wikipedia.org/wiki/Hurricane_Audrey

In 1957, Cameron was nearly destroyed by Hurricane Audrey. A storm surge of 12 feet (3.7 m) and winds of 125 miles per hour (201 km/h) caused the deaths of more than 300 residents of the town.[3] Nearly fifty years later, in late September 2005, Hurricane Ritahit Cameron. A 15-foot (4.6 m) storm surge and winds of 120 miles per hour (190 km/h) destroyed much of the town. Everyone had evacuated beforehand.[4] On September 13, 2008, Hurricane Ike leveled Cameron with a 12-foot (3.7 m) storm surge while the town was still recovering from Rita in 2005.[5] Ike destroyed more than 90 percent of the homes in the parish seat and caused catastrophic flooding in every part of the parish… On August 27, 2020, at 1:00 am CDT, Hurricane Laura made landfall near Cameron with maximum sustained winds of 150 mph.[7]https://en.wikipedia.org/wiki/Cameron,_Louisiana

Hurricane Laura is tied with the 1856 Last Island hurricane as the strongest Atlantic hurricane to make landfall in the U.S. state of Louisiana…
As of 11 pm, August 26:
130 kt (150 mph; 240 km/h) (1-min mean)
gusting to 155 kt (180 mph; 285 km/h)
Pressure:
938 mbar (hPa; 27.73 inHg)

https://en.wikipedia.org/wiki/Hurricane_Laura
Previous major hurricanes in region 1851 to ca 2008

Early on August 23, Laura made landfall near San Pedro de Macorís, Dominican Republic, with 45 miles per hour (72 km/h) winds.[9] Later that day, Laura’s center passed near Santo Domingo, the capital city of the Dominican Republic. While the storm crossed the island, the outflow and convective pattern improved.[10] Later on August 23, Laura emerged from Haiti and crossed the Windward Passage,[11] making a second landfall near Santiago de Cuba Province, Cuba, as a mid-range tropical storm, with winds of 60 miles per hour (95 km/h) and a minimum central pressure of 1000 mbar (29.53 inHg).[12] The storm’s structure degraded, losing its inner core of thunderstorms, and Laura made landfall in western Cuba in Pinar del Río Province around 00:00 UTC on August 25.[13] The storm reorganized after it emerged into the Gulf of Mexico later that day.[14]https://en.wikipedia.org/wiki/Hurricane_Laura

000
WTNT63 KNHC 270953
TCUAT3

Hurricane Laura Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL132020
500 AM CDT Thu Aug 27 2020

…HURRICANE CONDITIONS SPREADING FARTHER INLAND ACROSS SOUTHWESTERN
LOUISIANA…
…CATASTROPHIC STORM SURGE, HURRICANE FORCE WINDS, AND FLASH
FLOODING WILL CONTINUE THIS MORNING…

Beauregard Regional Airport in De Ridder, Louisiana recently
reported a wind gust of 82 mph (132 km/h).

An NWS RAWS site at Lacassine, Louisiana recently reported a wind
gust of 85 mph (137 km/h).

Acadiana Regional Airport reported a wind gust of 76 mph within the
past 30 minutes.

SUMMARY OF 500 AM CDT…1000 UTC…INFORMATION
———————————————–
LOCATION…30.7N 93.4W
ABOUT 45 MI…70 KM NNW OF LAKE CHARLES LOUISIANA
MAXIMUM SUSTAINED WINDS…110 MPH…175 KM/H
PRESENT MOVEMENT…N OR 355 DEGREES AT 15 MPH…24 KM/H
MINIMUM CENTRAL PRESSURE…954 MB…28.17 INCHES
$$
Forecaster Zelinsky/Cangialosi
https://www.nhc.noaa.gov/text/refresh/MIATCUAT3+shtml/270456.shtml


..LAURA MOVING NORTHWARD OVER SOUTHWESTERN LOUISIANA… …CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING CONTINUES IN PORTIONS OF LOUISIANA…
4:00 AM CDT Thu Aug 27
Location: 30.5°N 93.4°W
Moving: N at 15 mph
Min pressure: 948 mb
Max sustained: 120 mph

019
WTNT33 KNHC 270844
TCPAT3

BULLETIN
Hurricane Laura Advisory Number 30
NWS National Hurricane Center Miami FL AL132020
400 AM CDT Thu Aug 27 2020

…LAURA MOVING NORTHWARD OVER SOUTHWESTERN LOUISIANA…
…CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING
CONTINUES IN PORTIONS OF LOUISIANA…

SUMMARY OF 400 AM CDT…0900 UTC…INFORMATION
———————————————-
LOCATION…30.5N 93.4W
ABOUT 30 MI…50 KM NNW OF LAKE CHARLES LOUISIANA
ABOUT 50 MI…80 KM NE OF PORT ARTHUR TEXAS
MAXIMUM SUSTAINED WINDS…120 MPH…195 KM/H
PRESENT MOVEMENT…N OR 355 DEGREES AT 15 MPH…24 KM/H
MINIMUM CENTRAL PRESSURE…948 MB…28.00 INCHES

WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:

The Storm Surge Warning west of High Island, Texas has been
discontinued.

The Tropical Storm Warning from San Luis Pass to High Island, Texas
has been discontinued.

The Hurricane Watch from east of Intracoastal City to west of
Morgan City Louisiana has been canceled.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for…
* High Island Texas to the Mouth of the Mississippi River

A Hurricane Warning is in effect for…
* High Island Texas to Intracoastal City Louisiana

A Tropical Storm Warning is in effect for…
* East of Intracoastal City Louisiana to the Mouth of the
Mississippi River

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 400 AM CDT (0900 UTC), the center of Hurricane Laura was located
near latitude 30.5 North, longitude 93.4 West. Laura is moving
toward the north near 15 mph (24 km/h) and this motion should
continue through the day. A northeastward to east-northeastward
motion is expected tonight and Friday. On the forecast track, Laura
will move across southwestern Louisiana this morning, and then
continue northward across the state through this afternoon. The
center of Laura is forecast to move over Arkansas tonight, the
mid-Mississippi Valley on Friday, and the mid-Atlantic states on
Saturday.

Maximum sustained winds are near 120 mph (195 km/h) with higher
gusts. Laura is a category 3 hurricane on the Saffir-Simpson
Hurricane Wind Scale. Rapid weakening is forecast, and Laura is
expected to become a tropical storm later today.

Hurricane-force winds extend outward up to 60 miles (95 km) from the
center and tropical-storm-force winds extend outward up to 175 miles
(280 km). An observation in Chennault, Louisiana, recently
reported sustained winds of 76 mph (122 km/h) and a wind gust of 93
mph (150 km/h).

The estimated minimum central pressure is 948 mb (28.00 inches).
An unofficial observation of 948 mb (28.00 inches) was recently
measured in the eye of Laura.

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: 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 to Rockefeller Wildlife Refuge including Calcasieu
Lake…15-20 ft
Rockefeller Wildlife Refuge to Intracoastal City…10-15 ft
Intracoastal City to Morgan City including Vermilion Bay…8-12 ft
Sea Rim State Park to Johnson Bayou including Sabine Lake…4-8 ft
Morgan City to Mouth of the Mississippi River…4-7 ft
High Island to Sea Rim State Park…2-4 ft
Mouth of the Mississippi River to Ocean Springs 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 through the morning, with catastrophic wind damage
expected near Laura’s eyewall. Tropical storm conditions will
spread northward within the warning areas through the day.

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

RAINFALL: Through Friday, Laura is expected to produce the following
rainfall totals:

Across portions of Louisiana, Mississippi, across Arkansas: 6 to 12
inches with isolated totals of 18 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.

Through Saturday, Laura is expected to produce 1 to 3 inches with
isolated maximum amounts of 5 inches across the mid-Mississippi
Valley and portions of the Tennessee and Lower Ohio Valley, the
central Appalachians and the Mid-Atlantic States.

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

TORNADOES: Tornadoes are possible today and tonight over parts of
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 intermediate advisory at 700 AM CDT.
Next complete advisory at 1000 AM CDT.

$$
Forecaster Cangialosi/Zelinsky/Blake

https://www.nhc.noaa.gov/text/refresh/MIATCPAT3+shtml/270844.shtml

…EYEWALL OF LAURA PUSHING INLAND ACROSS SOUTHWESTERN LOUISIANA… …CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING ONGOING…
2:00 AM CDT Thu Aug 27
Location: 30.0°N 93.3°W
Moving: N at 15 mph
Min pressure: 941 mb
Max sustained: 140 mph

000
WTNT63 KNHC 270655
TCUAT3

Hurricane Laura Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL132020
200 AM CDT Thu Aug 27 2020

…EYEWALL OF LAURA PUSHING INLAND ACROSS SOUTHWESTERN LOUISIANA…
…CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING
ONGOING…

The eyewall of Laura will continue to move inland across
southwestern Louisiana during the next several hours. TAKE COVER
NOW! Treat these imminent extreme winds as if a tornado was
approaching and move immediately to the safe room in your shelter.
Take action now to protect your life!

The safest place to be during a major landfalling hurricane is in a
reinforced interior room away from windows. Get under a table or
other piece of sturdy furniture. Use mattresses, blankets or pillows
to cover your head and body. Remain in place through the passage of
these life-threatening conditions.

A National Ocean Service tide station at Calcasieu Pass, Louisiana
observed a water level rise of 9.19 ft Mean Higher High Water
at 100 CDT.

The Lake Charles, Louisiana airport recently reported a sustained
wind of 85 mph (137 km/h) with a gust to 128 mph (206 km/h).

A University of Florida observing tower near Lake Charles recently
reported a sustained wind of 86 mph (138 km/h) with a gust to 112
mph (180 km/h)

A Texas Coastal Ocean Observing Network site at Sabine Pass on the
Texas/Louisiana border recently reported sustained winds of 74 mph
(119 km/h) with a gust to 90 mph (145 km/h).

SUMMARY OF 200 AM CDT…0700 UTC…INFORMATION
———————————————–
LOCATION…30.0N 93.3W
ABOUT 10 MI…15 KM SW OF LAKE CHARLES LOUISIANA
ABOUT 40 MI…65 KM E OF PORT ARTHUR TEXAS
MAXIMUM SUSTAINED WINDS…140 MPH…225 KM/H
PRESENT MOVEMENT…N OR 350 DEGREES AT 15 MPH…24 KM/H
MINIMUM CENTRAL PRESSURE…941 MB…27.79 INCHES
$$
Forecaster Zelinsky/Cangialosi/Blake

https://www.nhc.noaa.gov/text/refresh/MIATCUAT3+shtml/270655.shtml

At 100 AM CDT (0600 UTC), Doppler radar images indicate that the eye of Hurricane Laura has made landfall at the coast near Cameron, Louisiana, near latitude 29.8 North, longitude 93.3 West. Laura is moving toward the north near 15 mph (24 km/h), and this motion should continue through the day. A northeastward to east-northeastward motion is expected tonight and Friday….

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 to Rockefeller Wildlife Refuge including Calcasieu Lake…15-20 ft Rockefeller Wildlife Refuge to Intracoastal City…10-15 ft Intracoastal City to Morgan City including Vermilion Bay…8-12 ft Sea Rim State Park to Johnson Bayou including Sabine Lake…6-9 ft Morgan City to Mouth of the Mississippi River…4-7 ft High Island to Sea Rim State Park…3-6 ft Freeport to High Island including Galveston Bay…2-4 ft Mouth of the Mississippi River to Ocean Springs 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.
https://www.nhc.noaa.gov/mobile/refresh/MIATCPAT3+html/MIATCPAT3_270558.html

NORTHERN EYEWALL OF LAURA MOVING OVER CAMERON PARISH… …CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING OCCURING IN SOUTHWESTERN LOUISIANA…
12:00 AM CDT Thu Aug 27
Location: 29.5°N 93.3°W
Moving: NNW at 15 mph
Min pressure: 938 mb
Max sustained: 150 mph

Public
Advisory
#29
1000 PM CDT
Aviso
Publico*
#29
1000 PM CDT
Forecast
Advisory
#29
0300 UTC
Forecast
Discussion
#29
1000 PM CDT
Wind Speed
Probabilities
#29
0300 UTC

000
WTNT63 KNHC 270456
TCUAT3

Hurricane Laura Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL132020
1200 AM CDT Thu Aug 27 2020

…NORTHERN EYEWALL OF LAURA MOVING OVER CAMERON PARISH…
…CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING
OCCURING IN SOUTHWESTERN LOUISIANA…

The eyewall of Laura is moving onshore over southwestern Louisiana.
TAKE COVER NOW! Treat these imminent extreme winds as if a tornado
was approaching and move immediately to the safe room in your
shelter. Take action now to protect your life!

The safest place to be during a major landfalling hurricane is in a
reinforced interior room away from windows. Get under a table or
other piece of sturdy furniture. Use mattresses, blankets or pillows
to cover your head and body. Remain in place through the passage of
these life-threatening conditions.

A Weatherflow site in Cameron recently reported a sustained
wind of 84 mph (135 km/h) with a gust to 110 mph (177 km/h).

A HurrNet Station in Cameron recently reported a sustained wind of
74 mph (119 km/h) with a gust to 93 mph (150 km/h).

A National Ocean Service site at Calcasieu Pass reported a wind
gust of 89 mph (132 km/h) within the last hour.

SUMMARY OF 1200 AM CDT…0500 UTC…INFORMATION
———————————————–
LOCATION…29.5N 93.3W
ABOUT 40 MI…65 KM S OF LAKE CHARLES LOUISIANA
ABOUT 45 MI…70 KM SE OF PORT ARTHUR TEXAS
MAXIMUM SUSTAINED WINDS…150 MPH…240 KM/H
PRESENT MOVEMENT…NNW OR 345 DEGREES AT 15 MPH…24 KM/H
MINIMUM CENTRAL PRESSURE…938 MB…27.70 INCHES

$$
Forecaster Zelinsky/Cangialosi

https://www.nhc.noaa.gov/text/refresh/MIATCUAT3+shtml/270456.shtml

227
WTNT33 KNHC 270253
TCPAT3

BULLETIN
Hurricane Laura Advisory Number 29
NWS National Hurricane Center Miami FL AL132020
1000 PM CDT Wed Aug 26 2020

…EXTREMELY DANGEROUS HURRICANE LAURA CLOSING IN ON THE NORTHWEST
GULF COAST…
…CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING
EXPECTED TONIGHT AND EARLY THURSDAY…

SUMMARY OF 1000 PM CDT…0300 UTC…INFORMATION
———————————————–
LOCATION…29.0N 93.2W
ABOUT 75 MI…120 KM S OF LAKE CHARLES LOUISIANA
ABOUT 75 MI…120 KM SE OF PORT ARTHUR TEXAS
MAXIMUM SUSTAINED WINDS…150 MPH…240 KM/H
PRESENT MOVEMENT…NNW OR 340 DEGREES AT 15 MPH…24 KM/H
MINIMUM CENTRAL PRESSURE…939 MB…27.73 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 1000 PM CDT (0300 UTC), the center of Hurricane Laura was located
near latitude 29.0 North, longitude 93.2 West. Laura is moving
toward the north-northwest near 15 mph (24 km/h). A turn toward
the north is expected by early Thursday, and a northward
motion should continue through the day. A northeastward to
east-northeastward motion is expected Thursday night and Friday. On
the forecast track, Laura will make landfall along the southwest
Louisiana coast within the next few hours and move inland within
that area early Thursday. The center of Laura is forecast to move
over northwestern Louisiana on Thursday, across Arkansas Thursday
night, and over the mid-Mississippi Valley on Friday.

Maximum sustained winds are near 150 mph (240 km/h) with higher
gusts. No significant change in strength is likely before landfall.
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 43 mph (69 km/h) and a gust to 49
mph (80 km/h) were recently reported by a National Ocean Service
station at Texas Point, Texas, at Sabine Pass. A wind gust to 58
mph (93 km/h) was recently reported at Cameron, Louisiana.

The minimum central pressure estimated from Air Force and NOAA
Hurricane Hunter observations is 939 mb (27.73 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 morning, with catastrophic wind damage
expected where Laura’s eyewall moves onshore. Tropical storm
conditions are moving onshore along the coast of Louisiana within
the tropical storm warning area and are expected to spread northward
within the warning areas overnight.

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: 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 tonight over Louisiana,
far southeast Texas, and southwestern Mississippi. The risk for
tornadoes will continue on 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 intermediate advisory at 100 AM CDT.
Next complete advisory at 400 AM CDT.

$$
Forecaster Pasch

https://www.nhc.noaa.gov/text/refresh/MIATCPAT3+shtml/270253.shtml