ZCZC NFDTCPAT4 ALL TTAA00 KWNH DDHHMM BULLETIN Post-Tropical Cyclone Nicholas Advisory Number 19 NWS Weather Prediction Center College Park MD AL142021 400 PM CDT Thu Sep 16 2021 ...POST-TROPICAL CYCLONE NICHOLAS NEAR LOUISIANA COAST... ...FLASH FLOODING REMAINS A POSSIBILITY ACROSS PORTIONS OF THE CENTRAL GULF COAST OVER THE NEXT COUPLE OF DAYS... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...29.9N 92.5W ABOUT 95 MI...155 KM S OF ALEXANDRIA LOUISIANA ABOUT 35 MI...60 KM SW OF LAFAYETTE LOUISIANA MAXIMUM SUSTAINED WINDS...25 MPH...35 KM/H PRESENT MOVEMENT...NNE OR 25 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- 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 ---------------------- At 400 PM CDT (2100 UTC), Post-Tropical Cyclone Nicholas was located near latitude 29.9 North, longitude 92.5 West. The low center was moving toward the north-northeast near 5 mph (7 km/h) and this motion is expected to continue through Friday. Maximum sustained winds are near 25 mph (35 km/h) with higher gusts. Continued gradual weakening is forecast during the next 48 hours with the low center eventually dissipating. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- 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 amounts of 6 inches possible. Flash flooding impacts, especially in urban areas, are possible across these regions. Widespread minor river flooding is expected, while scattered moderate river flooding is possible, 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 ------------- Next complete advisory at 1000 PM CDT. $$ Forecaster Carbin FORECAST POSITIONS AND MAX WINDS INIT 16/2100Z 29.9N 92.5W 20 KT 25 MPH...POST-TROP/REMNT LOW 12H 17/0600Z 30.4N 92.3W 20 KT 25 MPH...POST-TROP/REMNT LOW 24H 17/1800Z 31.2N 92.1W 20 KT 25 MPH...POST-TROP/REMNT LOW 36H 18/0600Z 32.1N 91.9W 15 KT 15 MPH...POST-TROP/REMNT LOW 48H 18/1800Z...DISSIPATED NNNN
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