ZCZC NFDTCPAT4 ALL TTAA00 KWNH DDHHMM BULLETIN Post-Tropical Cyclone Nicholas Advisory Number 22 NWS Weather Prediction Center College Park MD AL142021 1000 AM CDT Fri Sep 17 2021 ...POST-TROPICAL CYCLONE NICHOLAS DRIFTING NORTHWEST INTO WESTERN LOUISIANA... ...FLASH FLOODING REMAINS POSSIBLE ACROSS PORTIONS OF THE CENTRAL GULF COAST... SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...31.7N 93.2W ABOUT 65 MI...100 KM SSE OF SHREVEPORT LOUISIANA ABOUT 50 MI...80 KM NW OF ALEXANDRIA LOUISIANA MAXIMUM SUSTAINED WINDS...15 MPH...30 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...1012 MB...29.89 INCHES WATCHES AND WARNINGS -------------------- Flash Flood Watches are in effect along sections of the central Gulf Coast from southeast Louisiana across southern Mississippi and southern Alabama into the Florida Panhandle. DISCUSSION AND OUTLOOK ---------------------- At 1000 AM CDT (1500 UTC), the center of Post-Tropical Cyclone Nicholas was located near latitude 31.7 North, longitude 93.2 West. The post-tropical cyclone is moving toward the north near 7 mph (11 km/h) and this motion is expected to continue today. Maximum sustained winds are near 15 mph (30 km/h). The low center will become increasingly ill-defined over the next 24-36 hours. The estimated minimum central pressure is 1012 mb (29.89 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Nicholas is expected to produce additional rainfall of 1 to 3 inches across the central Gulf coast through the end of the week, with localized amounts of 6 inches possible. Within this region, isolated storm total rainfall amounts may reach 14 inches. 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 ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Carbin FORECAST POSITIONS AND MAX WINDS INIT 17/1500Z 31.7N 93.2W 15 KT 15 MPH...POST-TROP/REMNT LOW 12H 18/0000Z 32.4N 93.1W 15 KT 15 MPH...POST-TROP/REMNT LOW 24H 18/1200Z 32.4N 93.4W 15 KT 15 MPH...POST-TROP/REMNT LOW NNNN
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Page last modified: Friday, 31-Dec-2021 12:09:30 UTC