Atlantic Tropical Weather Discussion (Text)

AXNT20 KNHC 251116

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
616 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 0600 UTC surface analysis and satellite imagery through 
1015 UTC.


The monsoon trough extends from the African coast near 11N15W to 
03N21W. The Intertropical Convergence Zone extends from 03N21W to
03N40W. Scattered moderate convection is from 02N to 08N between 
09W and 16W, and from 03N to 11N between 24W and 32W.  



High pressure dominates the Gulf of Mexico this morning with a 
1017 mb high centered over SE Alabama, and a stationary 1015 mb 
high centered over the SW Gulf near 23N94W. These high pressure 
centers are supporting generally fair weather over the basin. The
only exception are showers over the eastern Gulf within 90 nm of a
surface trough that extends from 29N86W to 22N85W. Light to gentle
winds cover the majority of the Gulf, except for moderate winds
over the far NW and SE corners of the Gulf basin. Little change 
is expected through tonight. 


The tail end of a cold front is over the NW Caribbean from central 
Cuba near 22N80W to 19N83W. Deep moisture in SW flow covers the 
Caribbean between the cold front and 74W supporting scattered 
showers and isolated thunderstorms. A surface trough extends over 
the SW Caribbean from 16N80W to 10N78W. This trough is 
interacting with a moist air mass to support scattered moderate 
convection S of 13N and W of 75W, and scattered thunderstorms 
elsewhere within 90 nm of the surface trough. 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 stall over the NW
Caribbean and then dissipate through Monday. Otherwise, little 
change is expected.


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


A cold front extends into the area of discussion over the SW N
Atlantic near 31N75W to the Bahamas near 24N77W to Cuba near 
22N80W. The combination of this cold front and an upper trough to
the west supports scattered moderate convection N of 23N within 
450 nm E of a line from 31N71W to 23N77W. Farther east, a cold 
front extends from 31N52W to 26N58W. No significant convection is
noted with this front. A 1000 mb low is centered near 31N26W. 
This low supports a cold front that enters the area of discussion 
near 31N19W to 22N25W to 18N38W. Scattered moderate convection is
N of 25N between 15W and 23W. Fresh to strong NW winds are N of 
the front as well as large swell. Over the next 24 hours the
southern portion of the W Atlantic cold front will become
stationary. The other fronts will continue to move E. 

For additional information please visit 


Standard version of this page

Alternate Formats
About Alternates - E-Mail Advisories - RSS Feeds

Cyclone Forecasts
Latest Advisory - Past Advisories - About Advisories

Marine Forecasts
Latest Products - About Marine Products

Tools & Data
Satellite Imagery - US Weather Radar - Aircraft Recon - Local Data Archive - Forecast Verification - Deadliest/Costliest/Most Intense

Learn About Hurricanes
Storm Names Wind Scale - Prepare - Climatology - NHC Glossary - NHC Acronyms - Frequently Asked Questions - AOML Hurricane-Research Division

About Us
About NHC - Mission/Vision - Other NCEP Centers - NHC Staff - Visitor Information - NHC Library

Contact Us

NOAA/ National Weather Service
National Centers for Environmental Prediction
National Hurricane Center
11691 SW 17th Street
Miami, Florida, 33165-2149 USA
Privacy Policy
About Us
Career Opportunities
Page last modified: Saturday, 25-Nov-2017 11:16:36 UTC