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000
WTNT34 KWNH 170237
TCPAT4

BULLETIN
Post-Tropical Cyclone Nicholas Advisory Number 20
NWS Weather Prediction Center College Park MD AL142021
1000 PM CDT Thu Sep 16 2021


...POST-TROPICAL CYCLONE NICHOLAS DRIFTING NORTH INTO CENTRAL LOUISIANA...
...FLASH FLOODING REMAINS A POSSIBILITY ACROSS PORTIONS OF THE CENTRAL GULF COAST OVER THE NEXT COUPLE OF DAYS...



SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
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LOCATION...30.7N 92.4W ABOUT 40 MI...65 KM S OF ALEXANDRIA LOUISIANA ABOUT 40 MI...65 KM NW OF LAFAYETTE LOUISIANA MAXIMUM SUSTAINED WINDS...15 MPH...30 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES



WATCHES AND WARNINGS
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Flash Flood Watches are in effect along the central Gulf Coast from portions of southeast Louisiana, across southern Mississippi and Alabama, to the Florida Panhandle.



DISCUSSION AND OUTLOOK
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At 1000 PM CDT (0300 UTC), Post-Tropical Cyclone Nicholas was located near latitude 30.7 North, longitude 92.4 West. The low center was moving toward the north near 5 mph (7 km/h), and this motion is expected to continue through Friday.

Maximum sustained winds are near 15 mph (30 km/h) with higher gusts. Continued gradual weakening is forecast during the next 36 hours with the low center eventually dissipating.

The estimated minimum central pressure is 1009 mb (29.80 inches).



HAZARDS AFFECTING LAND
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RAINFALL: Nicholas is expected to produce additional rainfall of 2 to 4 inches across the central Gulf coast through the end of the week, with isolated storm total amounts of 14 inches possible. Flash flooding impacts, especially in urban areas, are possible across these regions.

Widespread minor to scattered moderate river flooding is ongoing or forecast across portions of southeastern Louisiana, southern Mississippi, southern Alabama, and the Florida Panhandle.

For the latest rainfall reports and wind gusts associated with Post Tropical Cyclone Nicholas see the companion storm summary at WBCSCCNS4 with the WMO header ACUS44KWBC or at the following link:

https://www.wpc.ncep.noaa.gov/discussions/nfdscc4.html



NEXT ADVISORY
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Next complete advisory at 400 AM CDT.

$$ Forecaster Hurley

FORECAST POSITIONS AND MAX WINDS

INIT 17/0300Z 30.7N 92.4W 15 KT 15 MPH...POST-TROP/REMNT LOW 12H 17/1200Z 31.3N 92.2W 15 KT 15 MPH...POST-TROP/REMNT LOW 24H 18/0000Z 32.3N 91.9W 15 KT 15 MPH...POST-TROP/REMNT LOW 36H 18/1200Z 32.9N 91.7W 15 KT 15 MPH...POST-TROP/REMNT LOW

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