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Tropical Storm Claudette Intermediate Advisory Number 7A
NWS National Hurricane Center Miami FL AL032021
700 AM CDT Sat Jun 19 2021
...CLAUDETTE INLAND OVER SOUTHEASTERN LOUISIANA...
...HEAVY RAINS AND TROPICAL-STORM-FORCE WINDS CONTINUE ALONG
PORTIONS OF THE NORTHERN GULF COAST...
SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION
ABOUT 30 MI...45 KM N OF NEW ORLEANS LOUISIANA
ABOUT 120 MI...195 KM W OF MOBILE ALABAMA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...NNE OR 15 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Tropical Storm Warning is in effect for...
* East of Morgan City, Louisiana to the Okaloosa/Walton County line
* Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
Interests elsewhere along the northern Gulf Coast and across the
southeast U.S. should monitor the progress of this system.
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 center of Tropical Storm Claudette was
located inland near latitude 30.4 North, longitude 90.1 West.
Claudette is moving toward the north-northeast near 12 mph (19
km/h). A turn toward the northeast is expected later today, followed
by a motion toward the east-northeast tonight or Sunday. On the
forecast track, the system should move farther inland over Louisiana
during the next few hours, then move across portions of the
southeastern states later today and Sunday, and over the western
Atlantic Ocean on Monday.
Maximum sustained winds remain near 45 mph (75 km/h) with higher
gusts. Claudette is expected to weaken to a tropical depression by
tonight and become a post-tropical cyclone on Sunday. The system is
forecast to become a tropical storm again over the western Atlantic
Ocean on Monday.
Tropical-storm-force winds extend outward up to 205 miles (335 km)
east of the center. A National Ocean Service station on Petit Bois
Island, Mississippi, recently reported maximum winds of 39 mph (63
km/h) with a gust to 46 mph (74 km/h).
The estimated minimum central pressure based on surface
observations is 1006 mb (29.71 inches).
HAZARDS AFFECTING LAND
Key messages for Claudette can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC,
and on the web at
RAINFALL: Claudette is expected to produce rainfall totals of 5 to
10 inches with isolated maximum amounts of 15 inches across portions
of the central Gulf Coast. Life-threatening flash flooding impacts
are possible across coastal Mississippi and Alabama, and the far
western Florida Panhandle through the afternoon. Considerable flash,
urban and small stream flooding impacts as well as new and renewed
minor to isolated moderate river flooding are likely across the
remainder of the Central Gulf Coast.
As the system continues to lift northeast through the weekend, heavy
rain will expand across central Alabama, central and northern
Georgia, and into the Piedmont of the Carolinas, resulting in
rainfall totals of 3 to 6 inches with isolated maximum amounts of 8
inches. Flash, urban, small stream and isolated minor river
flooding impacts are possible.
STORM SURGE: The combination of 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...
Morgan City, LA to Okaloosa/Walton County Line, FL...2-3 ft
Lake Borgne and Mobile Bay...2-3 ft
Lake Pontchartrain and Lake Maurepas...1-2 ft
Okaloosa/Walton County Line, FL to Panama City, FL...1-2 ft
Pensacola Bay, Choctawhatchee Bay, and Saint Andrew Bay...1-2 ft
Cameron, LA to Morgan City, LA...1-2 ft
Vermilion Bay...1-2 ft
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: Tropical storm conditions should continue along the coast in
the warning area today.
TORNADOES: A few tornadoes are possible today and tonight across
southern Mississippi, southern Alabama, the western Florida
Panhandle, and southwest Georgia.
Next complete advisory at 1000 AM CDT.