BULLETIN
Tropical Storm Gamma Advisory Number 6
NWS National Hurricane Center Miami FL AL252020
400 PM CDT Sat Oct 03 2020
…GAMMA MOVING OVER THE NORTHEASTERN YUCATAN PENINSULA…
SUMMARY OF 400 PM CDT…2100 UTC…INFORMATION
———————————————-
LOCATION…20.7N 87.7W
ABOUT 35 MI…60 KM NNW OF TULUM MEXICO
MAXIMUM SUSTAINED WINDS…65 MPH…100 KM/H
PRESENT MOVEMENT…NW OR 325 DEGREES AT 8 MPH…13 KM/H
MINIMUM CENTRAL PRESSURE…985 MB…29.09 INCHES
WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:
The government of Mexico has changed the Hurricane Warning to a
Tropical Storm Warning north of Punta Allen to Cancun Mexico,
including Cozumel, and discontinued all watches and warnings from
Punta Allen southward.
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 400 PM CDT (2100 UTC), the center of Tropical Storm Gamma was
located near latitude 20.7 North, longitude 87.7 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 65 mph (100 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 985 mb (29.09 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 several 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.