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Atlantic Tropical Weather Discussion (Text)



000
AXNT20 KNHC 260606
TWDAT

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0605 UTC Tue Jan 26 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 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
0530 UTC.

...SPECIAL FEATURES...

Gulf of Mexico Gale Warning: A reinforcing cold front will reach 
the NW Gulf coast Wednesday and combined with the stationary 
front in the region. The cold front will quickly move southeast 
across the basin through Thu. Fresh to strong N winds will follow 
the front, with gales force winds developing over W-central Gulf 
on Wed and over SW Gulf late Wed through Thu. Wave heights are 
forecast to range between 9-12 ft Wed night. Please read the 
latest NWS High Seas Forecast issued by the National Hurricane 
Center at the website 
https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml for more details.

Caribbean Gale Warning: High pressure located north of the 
Caribbean combined with the Colombian/Panamanian low will 
continue to support pulsing winds to gale force within about 90 
nm off the coast of Colombia each night through early Wed 
morning. Wave heights generated by these winds are forecast to 
range between 10-14 ft each day. Please read the latest NWS High 
Seas Forecast issued by the National Hurricane Center at the 
website https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml for more 
details.

...MONSOON TROUGH/ITCZ...

The monsoon trough extends from Sierra Leone near 07N13W to 
05N16W. The ITCZ then continues from 04N18W to 03N30W to the 
coast of Brazil near 00N47W. Scattered moderate convection is 
noted from 01N-06N between 22W-37W. Near the coast of Brazil, 
scattered moderate isolated strong convection is noted along the 
coast near the ITCZ from 01S-02N and west of 43W. 

GULF OF MEXICO...

Please refer to the Special Features section above for details 
about gale force winds in the SW Gulf.

Surface ridging prevails across most of the basin, anchored by a
1021 mb high centered over the west Atlantic. Cold front has 
moved into the northwest Gulf from 29N94W to near 26N97W near 
Port Mansfield, Texas. Scattered showers are noted along the cold 
front. ASCAT depicts moderate to fresh SE winds prevailing across 
the basin.

The weak cold front currently located over the far NW Gulf will 
stall there through today. A reinforcing cold front will reach 
the stationary front and merged by Wed morning. The combined front
will quickly move southeastward across the basin through Thu. 
Fresh to strong N winds will follow the front, with gales 
developing over W-central Gulf on Wed and over SW Gulf late Wed 
through Thu. Winds and seas will diminish on Fri. Return S winds 
should begin building over W Gulf on Sat.

CARIBBEAN SEA...

Please refer to the Special Features section above for details 
about gale force winds during the overnight and early morning 
hours near the coast of Colombia. 

Latest ASCAT data depicts moderate to fresh winds across the 
central Caribbean between 70W-78W from 14N to 17N, while fresh 
to strong are present south of 14N to the coast of Colombia 
between 71W-77W. Mid-level water vapor imagery shows dry and 
stable air over the basin, with only a few plumes of shallow 
moisture depicted in the low-level precipitable water imagery. 
This shallow moisture along with middle to upper-level diffluent 
flow may support scattered showers mainly over the NW Caribbean. 

Moderate to fresh trades will prevail, pulsing fresh to strong
over the Gulf of Honduras tonight through Tue night. N swell
will propagate into the Tropical N Atlantic waters Tue through 
Thu. A frontal boundary will remain north of the northeast 
Caribbean enhancing winds/seas/convection over the Greater 
Antilles. A strong cold front will enter the NW Caribbean 
on Thu followed by fresh to strong NE winds over the NW 
Caribbean waters on Fri and through the passes on Sat.

ATLANTIC OCEAN...

A cold front extends across the central Atlantic from 30N40W to 
22N54W, then becomes stationary from that point to 20N68W. Fresh 
SW to W winds associated with the front are north of 25N between 
35W and 55W as indicated by the latest scatterometer data. Fresh
to strong N to NW winds prevail behind the front mainly N of 
27N. Scattered moderate convection is within 60 nm either side of
the front mainly N of 26N. Surface ridge prevails over the W 
Atlantic waters, anchored by a 1021 mb high centered near 27N69W. 
ASCAT indicates moderate to fresh southerly winds north of the 
Bahamas to 32N. Surface ridging also prevail across the eastern 
Atlantic, anchored by a 1028 mb high centered near 32N16W. 
Moderate to fresh winds are present along the southern periphery 
of the ridge. 

Looking ahead in the western Atlantic, the reinforcing cold 
front extending along 21N will continue to move southward over 
the Greater Antilles today. S to SW winds will increase across 
the waters east of N Florida tonight. Low pressure crossing 
north of Bermuda will bring fresh to strong W winds to the NE 
waters on Tue. A strong cold front will move off the SE U.S 
coast Wed night while the associated low pressure rapidly 
intensifies north of the forecast area. Gale force winds and 
very large seas are expected with this system Wed night through 
Thu night, mainly N of 27N. Winds and seas should 
diminish Fri and Sat.

$$ 
Torres

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Page last modified: Tuesday, 26-Jan-2021 06:06:29 UTC