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Tropical Storm Gamma Intermediate Advisory Number 7A
NWS National Hurricane Center Miami FL AL252020
100 AM CDT Sun Oct 04 2020
...GAMMA MOVES OVER THE EXTREME SOUTHERN GULF OF MEXICO...
...TORRENTIAL RAINS OCCURRING OVER THE NORTHERN YUCATAN PENINSULA...
SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION
ABOUT 100 MI...160 KM WNW OF CANCUN MEXICO
ABOUT 100 MI...160 KM ENE OF PROGRESO MEXICO
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NW OR 325 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.38 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
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 100 AM CDT (0600 UTC), the center of Tropical Storm Gamma was
located near latitude 21.8 North, longitude 88.2 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 later
today, followed by a turn to the west or west-southwest tonight or
Monday. On the forecast track, the center of Gamma will meander
offshore of the northern Yucatan Peninsula and over the extreme
southern Gulf of Mexico today, and pass near or just offshore of the
northern coast of the Yucatan Peninsula on Monday and Tuesday.
Maximum sustained winds have decreased to near 50 mph (95 km/h)
with higher gusts. Some re-strengthening is expected during the next
day or so now that the center of Gamma has moved back out over open
Tropical-storm-force winds extend outward up to 105 miles (165 km)
from the center.
The estimated minimum central pressure is 995 mb (29.38 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 storm total 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 from southern Guatemala towards the Gulf of
Fonseca region between eastern El Salvador, southern Honduras, and
northwest Nicaragua, with accumulations of 4 to 6 inches and
isolated maximum amounts of 8 inches.
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 on the north coast of the Yucatan through
today. Tropical Storm conditions are possible within the Tropical
Storm Watch area on Monday.
Next complete advisory at 400 AM CDT.