Atlantic Tropical Weather Discussion (Text)

AXNT20 KNHC 300519

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0605 UTC Fri Jul 30 2021

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 31N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.

Based on 0000 UTC surface analysis and satellite imagery through 
0500 UTC.


An Atlantic tropical wave is along 31W from 16N southward, 
moving W at 10 to 15 kt. Scattered moderate convection is noted 
from 05N to 08N between 30W to 33W. 

An Atlantic tropical wave is along 55W from 18N southward, 
moving W around 15 to 20 kt. Scattered showers are noted from 
11N to 13N between 54W to 56W. 

A Caribbean Sea tropical wave is along 79W from 21N southward, 
moving W around 15 to 20 kt. Scattered moderate convection from 
17N to 22N between 78W to 81W. 


The monsoon trough extends off the coast of Senegal near 14N17W 
to 06N41W. At this time, there is no coherent ITCZ west of the 
monsoon trough. Scattered moderate convection is noted along and 
south of the monsoon trough from 02N to 11N between 17W and 36W. 


High pressure ridging extends across the Gulf of Mexico, 
anchored by a 1017 mb high near 27N89W. A trough extends across 
the western Gulf from 20N95W to 28N95W. Scattered moderate 
convection is noted over the Bay of Campeche, S of 23N between 
91W and 97W. An area of scattered moderate convection is along 
the northeast Gulf from 28N to 30N between 84W and 86W. Light to 
gentle winds are noted across the basin with seas ranging 1 to 3 

For the forecast, the trough across the western Gulf will drift 
west and gradually dissipate through this afternoon. High 
pressure over the Gulf will drift westward and dominate the Gulf 
region during the upcoming weekend, then re-establish itself over 
the eastern Gulf by early next week.


Numerous strong convection is noted right along the Colombian 
coast, S of 12N between 75W to 79W. Scattered moderate convection
is in the NW Caribbean, N of 17N between 75W and 89W. Latest 
scatterometer data depicts fresh to strong winds north of 
Colombia, with moderate to fresh winds across the central 
Caribbean. Gentle to moderate winds are noted across the western 
Caribbean. Seas range 5 to 8 ft in the central Caribbean with seas
3 to 5 ft elsewhere. 

For the forecast, fresh to strong trades over the central 
Caribbean will continue through early Mon, then diminish to fresh
speeds through Tue night as Atlantic high pressure weakens.


The Atlantic ridge extends west southwest from a 1027 mb high 
near 31N51W to northeast Florida. Isolated showers and 
thunderstorms are noted across the SW N Atlantic with light to 
gentle winds across the area. Seas range 3 to 5 ft. In the 
central Atlantic, a trough extends from 22N42W to 30N44W with no 
significant convection. Otherwise, high pressure ridging also 
extends across this area with light to gentle winds and seas 3 
to 6 ft. 

For the forecast west of 65W, high pressure ridging near 27N 
will change little into early next week. Expect fresh to locally 
strong east winds during the late afternoons and at night just 
off the northern coast of Hispaniola, including approaches to 
the Windward Passage through early next week. Moderate to fresh 
south to southwest winds are expected across the far northwest 
waters Sun night through Mon night.

In the eastern Atlantic, moderate to fresh N to NE winds are 
noted especially off the coast of Morocco. Seas range 3 to 6 ft. 


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: Friday, 30-Jul-2021 05:19:34 UTC