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BULLETIN
Hurricane Tammy Advisory Number  21
NWS National Hurricane Center Miami FL       AL202023
1100 AM AST Mon Oct 23 2023
 
...TAMMY MOVING NORTHWARD...
...HEAVY RAINS LINGERING OVER PORTIONS OF THE LEEWARD ISLANDS...
 
 
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...21.9N 63.9W
ABOUT 260 MI...420 KM N OF ANGUILLA
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...N OR 5 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES
 
 
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 1100 AM AST (1500 UTC), the center of Hurricane Tammy was located 
near latitude 21.9 North, longitude 63.9 West. Tammy is moving 
toward the north near 7 mph (11 km/h). A turn toward the 
north-northeast or northeast is expected to begin later today and 
continue into Tuesday.
 
Maximum sustained winds are near 80 mph (130 km/h) with higher 
gusts.  Some slight strengthening is possible during the next day or 
so followed by weakening.
 
Hurricane-force winds extend outward up to 25 miles (35 km) from the
center and tropical-storm-force winds extend outward up to 125 miles
(205 km).
 
The estimated minimum central pressure is 993 mb (29.33 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Tammy can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT5 and WMO header WTNT45 KNHC
and on the web at hurricanes.gov/text/MIATCDAT5.shtml
 
RAINFALL:  Rain bands south of Hurricane Tammy are expected to
produce an additional 1 to 3 inches of rainfall across portions of
the Virgin Islands and northern Leeward Islands today, bringing
storm total maximum amounts to 12 inches in the Leeward Islands. The
additional rainfall may produce isolated flash and urban flooding,
along with isolated mudslides in areas of higher terrain.
 
SURF:  Swells generated by Tammy will continue to affect portions of
the Leeward Islands, the British and U.S. Virgin Islands, and Puerto
Rico during the next few days.  These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.
 
 
NEXT ADVISORY
-------------
Next complete advisory at 500 PM AST.
 
$$
Forecaster Bucci
 
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