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| #987696 (Received by flhurricane at: 10:57 PM 25.Oct.2019) TCPAT2 BULLETIN Post-Tropical Cyclone Olga Advisory Number 3 NWS National Hurricane Center Miami FL AL172019 1000 PM CDT Fri Oct 25 2019 ...OLGA BECOMES POST-TROPICAL... ...EXPECTED TO BRING HEAVY RAIN AND SEVERE WEATHER TO THE CENTRAL GULF COAST AND LOWER MISSISSIPPI VALLEY ON SATURDAY... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...27.8N 92.2W ABOUT 170 MI...275 KM SSE OF LAKE CHARLES LOUISIANA MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES WATCHES AND WARNINGS -------------------- There are no coastal tropical cyclone watches or warnings in effect. Please see High Seas Forecasts issued by the National Weather Service and products from local National Weather Service forecast offices for information on the non-tropical watches and warnings associated with this system. DISCUSSION AND OUTLOOK ---------------------- At 1000 PM CDT (0300 UTC), the center of Post-Tropical Cyclone Olga was located near latitude 27.8 North, longitude 92.2 West. The post-tropical cyclone is moving toward the northeast near 17 mph (28 km/h). Olga is forecast to move quickly northward to north-northeastward on Saturday and then turn northeastward late Saturday or Sunday. On the forecast track, the center of the post-tropical cyclone will move up the Mississippi Valley tomorrow and toward the Great Lakes later this weekend. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Weakening is expected after the cyclone moves over land Saturday morning. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure based on earlier data from an Air Force Reserve hurricane hunter aircraft and surface observations over the northern Gulf of Mexico is 999 mb (29.50 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Gale-force winds associated with Olga and its remnants should spread over portions of the northern Gulf coast tonight and Saturday morning. RAINFALL: The post-tropical cyclone, along with rainfall ahead of the system along and north of the frontal boundary across the Central Gulf coast, is expected to produce total rainfall accumulations of 3 to 6 inches with maximum totals of 8 inches across the Central Gulf coast into portions of the Lower Mississippi Valley and western Tennessee Valley through Saturday morning. These rains may produce flash flooding across the Central Gulf coast into the Lower Mississippi Valley and western Tennessee Valley. COASTAL FLOODING: Above-normal tides and associated coastal flooding are possible across portions of the northern Gulf coast. Please see products from local National Weather Service forecast offices for additional information. TORNADOES: Isolated tornadoes are possible tonight into Saturday morning across parts of southeast Louisiana, southern Mississippi, and western Alabama. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on this system. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php Additional information about heavy rainfall and wind gusts can be found in storm summary products issued by the Weather Prediction Center at www.wpc.ncep.noaa.gov/discussions/nfdscc3.html $$ Forecaster Zelinsky |
