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SAM Advisory
Expires:No;;394587
WTNT33 KNHC 242048
TCPAT3
BULLETIN
Tropical Storm Gaston Advisory Number 18
NWS National Hurricane Center Miami FL AL082022
900 PM GMT Sat Sep 24 2022
...GASTON CONTINUING WESTWARD...
SUMMARY OF 900 PM GMT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...38.2N 31.8W
ABOUT 170 MI...275 KM W OF FAIAL ISLAND IN THE CENTRAL AZORES
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
None.
SUMMARY OF WATCHES AND WARNING IN EFFECT:
A Tropical Storm Warning is in effect for...
* Flores and Corvo in the western Azores
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 24 hours.
For storm information specific to your area, please monitor
products issued by your national meteorological service.
DISCUSSION AND OUTLOOK
----------------------
At 900 PM GMT (2100 UTC), the center of Tropical Storm Gaston was
located near latitude 38.2 North, longitude 31.8 West. Gaston is
moving toward the west near 12 mph (19 km/h), and this general
motion is expected to continue through Sunday. A turn to the
southwest is forecast by late Sunday.
Maximum sustained winds are near 40 mph (65 km/h) with higher gusts.
Gradual weakening is forecast over the next few days, and Gaston is
expected to become a post-tropical cyclone overnight or Sunday
morning.
Tropical-storm-force winds extend outward up to 125 miles (205 km)
from the center.
The estimated minimum central pressure is 1002 mb (29.59 inches).
HAZARDS AFFECTING LAND
----------------------
Key messages for Gaston can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC
and on the web at hurricanes.gov/text/MIATCDAT3.shtml.
WIND: Tropical-storm-force winds are expected in portions of the
western Azores for the next several hours. See products issued by
the meteorological service in the Azores for more information.
SURF: Swells generated by Gaston are expected to affect portions of
the Azores through tonight. These swells are likely to cause
life-threatening surf and rip current conditions.
RAINFALL: Gaston is expected to produce additional rainfall
accumulations of 1 to 2 inches across the western and central
Azores. This will result in storm total rainfall maxima up to 6
inches which may result in landslides and areas of flooding.
NEXT ADVISORY
-------------
Next intermediate advisory at 1200 AM GMT.
Next complete advisory at 300 AM GMT.
$$
Forecaster Bucci
Expires:No;;394549
WTNT23 KNHC 242048
TCMAT3
TROPICAL STORM GASTON FORECAST/ADVISORY NUMBER 18
NWS NATIONAL HURRICANE CENTER MIAMI FL AL082022
2100 UTC SAT SEP 24 2022
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
NONE.
SUMMARY OF WATCHES AND WARNING IN EFFECT...
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* FLORES AND CORVO IN THE WESTERN AZORES
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE
NEXT 24 HOURS.
TROPICAL STORM CENTER LOCATED NEAR 38.2N 31.8W AT 24/2100Z
POSITION ACCURATE WITHIN 20 NM
PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 10 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1002 MB
MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT.
34 KT....... 90NE 90SE 100SW 110NW.
12 FT SEAS..240NE 90SE 120SW 240NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
REPEAT...CENTER LOCATED NEAR 38.2N 31.8W AT 24/2100Z
AT 24/1800Z CENTER WAS LOCATED NEAR 38.1N 31.2W
FORECAST VALID 25/0600Z 38.6N 33.7W...POST-TROPICAL
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 90NE 70SE 70SW 100NW.
FORECAST VALID 25/1800Z 38.6N 36.1W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 26/0600Z 38.3N 38.0W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 26/1800Z 38.0N 39.9W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 27/0600Z 37.5N 42.0W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.
FORECAST VALID 27/1800Z 37.0N 45.0W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 125 NM
ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
OUTLOOK VALID 28/1800Z...DISSIPATED
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 38.2N 31.8W
INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 25/0000Z
NEXT ADVISORY AT 25/0300Z
$$
FORECASTER BUCCI
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