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Tropical Storm Gamma Forecast Advisory Number 7

2020-10-04 04:31:07| National Hurricane Center (Atlantic)

Issued at 0300 UTC SUN OCT 04 2020 000 WTNT25 KNHC 040230 TCMAT5 TROPICAL STORM GAMMA FORECAST/ADVISORY NUMBER 7 NWS NATIONAL HURRICANE CENTER MIAMI FL AL252020 0300 UTC SUN OCT 04 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * NORTH AND WEST OF PUNTA ALLEN TO DZILAM MEXICO...INCLUDING COZUMEL A TROPICAL STORM WATCH IS IN EFFECT FOR... * WEST OF DZILAM TO PROGRESO MEXICO A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. TROPICAL STORM CENTER LOCATED NEAR 21.3N 88.0W AT 04/0300Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 325 DEGREES AT 6 KT ESTIMATED MINIMUM CENTRAL PRESSURE 990 MB MAX SUSTAINED WINDS 50 KT WITH GUSTS TO 60 KT. 50 KT....... 40NE 0SE 0SW 0NW. 34 KT....... 90NE 70SE 0SW 90NW. 12 FT SEAS.. 30NE 0SE 0SW 120NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 21.3N 88.0W AT 04/0300Z AT 04/0000Z CENTER WAS LOCATED NEAR 21.0N 87.9W FORECAST VALID 04/1200Z 21.8N 88.2W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 40NW. 34 KT...100NE 50SE 0SW 90NW. FORECAST VALID 05/0000Z 22.2N 88.5W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 40NW. 34 KT...100NE 40SE 20SW 90NW. FORECAST VALID 05/1200Z 22.1N 88.9W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 40NW. 34 KT...100NE 40SE 20SW 90NW. FORECAST VALID 06/0000Z 21.8N 89.9W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 40NW. 34 KT...100NE 40SE 20SW 90NW. FORECAST VALID 06/1200Z 21.3N 90.9W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 40NW. 34 KT...100NE 40SE 20SW 90NW. FORECAST VALID 07/0000Z 20.7N 91.7W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 40NW. 34 KT...100NE 40SE 20SW 90NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 08/0000Z 20.0N 92.5W MAX WIND 50 KT...GUSTS 60 KT. OUTLOOK VALID 09/0000Z 19.9N 93.3W MAX WIND 50 KT...GUSTS 60 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.3N 88.0W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPAT5...AT 04/0600Z NEXT ADVISORY AT 04/0900Z $$ FORECASTER CANGIALOSI

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Summary for Tropical Storm Gamma (AT5/AL252020)

2020-10-04 01:35:05| National Hurricane Center (Atlantic)

...GAMMA INLAND OVER THE YUCATAN PENINSULA PRODUCING HEAVY RAINFALL... As of 7:00 PM CDT Sat Oct 3 the center of Gamma was located near 21.0, -87.9 with movement NW at 8 mph. The minimum central pressure was 990 mb with maximum sustained winds of about 60 mph.

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Tropical Storm Gamma Public Advisory Number 6A

2020-10-04 01:35:05| National Hurricane Center (Atlantic)

Issued at 700 PM CDT Sat Oct 03 2020 000 WTNT35 KNHC 032334 TCPAT5 BULLETIN Tropical Storm Gamma Intermediate Advisory Number 6A NWS National Hurricane Center Miami FL AL252020 700 PM CDT Sat Oct 03 2020 ...GAMMA INLAND OVER THE YUCATAN PENINSULA PRODUCING HEAVY RAINFALL... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...21.0N 87.9W ABOUT 60 MI...100 KM NNW OF TULUM MEXICO MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...990 MB...29.23 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * North and west of Punta Allen to Dzilam Mexico, including Cozumel A Tropical Storm Watch is in effect for... * West of Dzilam to Progreso Mexico A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 700 PM CDT (0000 UTC), the center of Tropical Storm Gamma was located inland near latitude 21.0 North, longitude 87.9 West. Gamma is moving toward the northwest near 8 mph (13 km/h), and a turn toward the north-northwest with decreasing forward speed is expected tonight and Sunday, followed by a turn to the west or west-southwest Sunday night or Monday. On the forecast track, the center of Gamma will continue to move over the northeastern Yucatan Peninsula through tonight, move into the southern Gulf of Mexico on Sunday, and pass near or north of the northern coast of the Yucatan Peninsula Sunday night and Monday. Maximum sustained winds have decreased to near 60 mph (95 km/h) with higher gusts. Additional weakening is forecast tonight and Sunday, followed by some re-intensification by Monday. Tropical-storm-force winds extend outward up to 80 miles (130 km) from the center. The estimated minimum central pressure is 990 mb (29.23 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 northeastern Quintana Roo and northern Yucatan. This rainfall may produce life-threatening flash floods. A separate area of significant rain is possible in the Mexican states of Campeche, Tabasco, northern Chiapas, and southeast Veracruz, with rainfall of 6 to 8 inches and isolated maximum amounts of 12 inches. This rainfall may produce life-threatening flash floods and mudslides. The storm will also result in an area of heavy rains to the south that will affect the Gulf of Fonseca region between eastern El Salvador, southern Honduras, and northwest Nicaragua with accumulation of 4 to 6 inches and isolated maximum amounts of 8 inches. Rainfall of 1 to 3 inches with maximum amounts of 5 inches is expected over the Cayman Islands. WIND: Tropical storm conditions should continue within the Tropical Storm Warning area on the east coast of the Yucatan Peninsula for the next few hours, 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 on Monday. NEXT ADVISORY ------------- Next complete advisory at 1000 PM CDT. $$ Forecaster Cangialosi

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