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Tropical Storm Gamma Public Advisory Number 4
2020-10-03 11:00:52| National Hurricane Center (Atlantic)
Issued at 400 AM CDT Sat Oct 03 2020 847 WTNT35 KNHC 030900 TCPAT5 BULLETIN Tropical Storm Gamma Advisory Number 4 NWS National Hurricane Center Miami FL AL252020 400 AM CDT Sat Oct 03 2020 ...GAMMA CONTINUES TO STRENGTHEN AS IT MOVES TOWARD THE YUCATAN PENINSULA... ...HEAVY RAINFALL EXPECTED TO BE THE MAIN THREAT... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...19.4N 86.9W ABOUT 75 MI...120 KM S OF COZUMEL MEXICO MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.29 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Government of Mexico has issued a Tropical Storm Warning for the north coast of the Yucatan Peninsula from Cabo Catoche to Dzilam, and a Tropical Storm Watch for the north coast of the Yucatan Peninsula west of Dzilam to Progreso. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Punta Herrero to Dzilam Mexico A Tropical Storm Watch is in effect for... * South of Punta Herrero to Puerto Costa Maya Mexico * West of Dzilam to Progreso Mexico A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 400 AM CDT (0900 UTC), the center of Tropical Storm Gamma was located near latitude 19.4 North, longitude 86.9 West. Gamma is moving toward the northwest near 9 mph (15 km/h), and this motion should continue at a slower forward speed today. A turn toward the north is expected on Sunday, followed by a turn to the west or west-southwest Sunday night or Monday. On the forecast track, the center of Gamma should move inland over the northeastern Yucatan Peninsula later today, and be near the north coast of the Yucatan Peninsula on Sunday. Reports from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 50 mph (85 km/h) with higher gusts. Additional strengthening is expected before Gamma makes landfall on the Yucatan Peninsula. After landfall, a slight weakening is expected. Tropical-storm-force winds extend outward up to 80 miles (130 km) from the center. The minimum central pressure extrapolated by the Hurricane Hunter aircraft is 992 mb (29.29 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Tropical Storm Gamma can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT5, WMO header WTNT45 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT5.shtml. RAINFALL: Gamma is expected to produce rainfall of 4 to 8 inches across portions of the Yucatan Peninsula and far western Cuba, with maximum rainfall amounts as high as 10 to 15 inches possible across the northeastern portion of the Mexican state of Quintana Roo. This rainfall may produce life-threatening flash floods. A separate area of significant rain is expected to develop well away from the center in the Mexican states of Campeche, Tabasco, and northern Chiapas with rainfall of 8 to 12 inches and isolated maximum amounts of 20 inches. This rainfall may produce life-threatening flash floods and mudslides. Rainfall of 1 to 3 inches with maximum amounts of 5 inches is expected in the Bay Islands of Honduras and over the Cayman Islands. WIND: Tropical storm conditions are spreading into the Tropical Storm Warning area on the east coast of the Yucatan Peninsula, and these conditions should spread across the remainder of the warning area through Sunday. Tropical Storm conditions are possible within the Tropical Storm Watch area later today and on Sunday. NEXT ADVISORY ------------- Next intermediate advisory at 700 AM CDT. Next complete advisory at 1000 AM CDT. $$ Forecaster Beven
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