Atlantic Tropical Weather Discussion (Text)

AXNT20 KNHC 250554

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1254 AM EST Sat Nov 25 2017

Tropical Weather Discussion for North America, Central America
Gulf of Mexico, Caribbean Sea, northern sections of South
America, and Atlantic Ocean to the African coast from the
Equator to 32N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.

Based on 0000 UTC surface analysis and satellite imagery through 
0430 UTC.


The monsoon trough extends from the African coast near 11N15W to 
06N21W. The Intertropical Convergence Zone extends from 06N21W to
06N38W. Scattered moderate convection is from 03N to 08N between
09W and 14W. 



High pressure dominates the Gulf of Mexico tonight with a 1018 mb
high centered over the Alabama/Georgia border, and a 1015 mb high
centered over the SW Gulf near 23N95W. These high pressure centers 
are supporting fair weather over the basin. Light to gentle winds
cover the western Gulf. Gentle to moderate winds cover the 
eastern Gulf. Little change is expected through Sunday. A weak 
trough of low pressure with showers may develop Sunday night over 
the SE Gulf. 


The tail end of a cold front is over the NW Caribbean from W Cuba
at 22N81W to 19N85W. Deep moisture in SW flow covers the Caribbean
betweenthe cold front and 74W to support scattered showers and 
isolated thunderstorms. A surface trough extends over the SW gulf
from 15N79W to 10N76W. This trough is interacting with a moist 
air mass to support widely scattered moderate convection S of 15N 
and W of 73W. Gentle to moderate NW winds are west of 82W, except
fresh near the coast of Honduras and Nicaragua. Mainly moderate 
easterly trades cover the Caribbean E of 82W. Over the next 24 
hours the front will dissipate. Otherwise little change is 


Isolated showers and thunderstorms continue over the area tonight
as moist SW flow aloft prevails over the region. Little change is
expected through Sunday. 


A 1008 mb low is centered near 30.5N78W. A cold front extends from
this low to the Bahamas near 25N78W to Cuba near 23N80W. The
combination of this cold front and an upper trough to the west
supports scattered moderate convection N of 26N within 450 nm E 
of a line from 31N73W to 25N78W. Farther east, a cold front
extends from 31N53W to 25N60W. No significant convection is noted
with this front. A 1001 mb low is centered near 30N36W. This low
supports a cold front that enters the area of discussion near
31N20W to 24N23W to 21N33W to 22N40W. Scattered moderate
convection is N of 25N between 16W and 21W. Fresh to strong NW 
winds are N of the front as well as large swell. 

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Page last modified: Saturday, 25-Nov-2017 05:54:48 UTC