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Atlantic Tropical Weather Discussion



000
AXNT20 KNHC 230621 CCA
TWDAT 

Tropical Weather Discussion...CORRECTED
NWS National Hurricane Center Miami FL
221 AM EDT Mon Sep 23 2019

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 
0545 UTC.

...SPECIAL FEATURES...

Tropical Storm Karen is centered near 13.3N 63.6W at 23/0600 UTC 
or 315 nm SSE of St. Croix moving NW at 7 kt. Estimated minimum 
central pressure is 1007 mb. T.S. Karen has maximum sustained 
winds of 35 kt with gusts to 45 kt. Scattered moderate isolated 
strong convection extends 140 nm SW quadrant from 10N-12N between 
62W-65W. On the forecast track, the center of Karen will move 
across the eastern Caribbean Sea through tonight. On Tuesday, 
Karen is expected to pass near or over Puerto Rico and the Virgin 
Islands. Little change in strength is expected during the next 
couple of days. See the latest NHC forecast/advisory under 
AWIPS/WMO headers MIATCMAT2/WTNT22 KNHC for more details.

Tropical Storm Jerry is centered near 27.5N 67.2W at 23/0600 UTC 
or 365 nm SSW of Bermuda moving NNW at 7 kt. Estimated minimum 
central pressure is 993 mb. Maximum sustained wind speed is 55 kt 
with gusts to 65 kt. Scattered to numerous moderate to strong 
convection prevails 200 nm in the NE and SE quadrant, from 23N-
29N between 61W-67W. Scattered showers extend out 400 nm on the NE
quadrant and 250 nm SE quadrant. A turn to the north is expected 
Monday night followed by a turn to the northeast on Tuesday. On 
the forecast track, the center of Jerry is expected to pass near 
Bermuda by Tuesday night. Gradual weakening is expected during the
next few days. See the latest NHC forecast/advisory under 
AWIPS/WMO headers MIATCMAT5/WTNT25 KNHC or www.hurricanes.gov for 
more details.

Tropical Depression Thirteen has formed in the far Eastern Atlantic
at 23/0300 UTC. T.D. Thirteen is located near 10.8N 20.9W or 365
nm SE of the southernmost Cabo Verde Islands, moving W at 13 kt.
Estimated minimum pressure is 1007 mb. Maximum sustained winds of
30 kt with gust to 40 kt. A general motion toward the west is 
expected through Monday, with a motion toward the west-northwest 
expected Monday night and Tuesday. On the forecast track, the 
center of the depression should pass well south of the Cabo Verde 
Islands. Steady strengthening is expected, with the depression 
forecast to become a tropical storm on Monday and a hurricane by 
Tuesday night. See the latest NHC forecast/advisory under 
AWIPS/WMO headers MIATCMAT3/WTNT23 KNHC or www.hurricanes.gov for
more details. 

...TROPICAL WAVES...

An Atlantic tropical wave with axis along 35W from 21N southward 
is moving W at 10-15 kt. Model diagnostics depict this wave well. 
Scattered showers are noted along the wave axis. 

...MONSOON TROUGH/ITCZ...

The monsoon trough extends from the coast of Mauritania near 17N16W
to a 1008 mb low near 10N20W to 09N30W to 07N44W. The ITCZ extends
from 07N44W to 07N54W. Aside from the convection mentioned in the
sections above, scattered moderate convection is from 05N-09N 
between 24W-34W and 07N-10N between 42W-47W.

GULF OF MEXICO...

Surface ridging prevails across the northern Gulf of Mexico,
anchored by a 1022 mb high centered in the western Atlantic. This
feature is keeping east to southeast surface flow across much of 
the Gulf of Mexico. A weakening stationary front over the western
Atlantic passes through the Bahamas near 24N78W to the Florida 
Straits near 23N80W to the eastern Gulf near 23N85W. Scattered 
moderate convection is seen along the boundary. Scattered showers
are present from 22N-26N and west of 91W. Latest ASCAT data depicts
fresh to strong NE to E winds over the eastern Gulf of Mexico north
of the front mainly east of 81W from 23N-29N. Gentle to moderate 
east to southeast winds prevail elsewhere across the basin. 

The pressure gradient between high pressure to the north and 
lower pressure associated with a diminishing stationary front to 
the south will weaken as the high spreads southward and the front 
dissipates for the start of the week. Thus, winds and seas will 
gradually lessen into Monday. Overall high pressure will dominate 
through much of the week.

CARIBBEAN SEA...

Refer to the section above for information on Tropical Storm 
Karen in the SE Caribbean. 

An E-W stationary front is over the Florida Straits enhancing 
convection near NW Cuba. Scattered showers and tstorms are also 
seen over Hispaniola, the Mona Passage and eastern Cuba. In the
SW Caribbean south of 10N and west of 79W, scattered showers 
are present due to the proximity of the East Pacific monsoon 
trough. Latest scatterometer data depicts light to gentle winds 
across most of the basin, except the eastern Caribbean near T.S. 
Karen.

Tropical Storm Karen will move north of Puerto Rico by Wednesday 
morning, then continue moving north into late week, slowing in 
forward speed with time. 

ATLANTIC OCEAN...

Refer to the sections above for details on the tropical waves and
Tropical Storm Jerry. 

A cold front enters the forecast area near 31N45W to 27N58W. A 
weakening stationary front is analyzed west of T.S. Jerry and 
extends from 26N71W across the Bahamas to 24N78W into the Gulf of 
Mexico. Scattered moderate convection is seen 100 nm of the cold 
front and scattered showers are seen in the vicinity of the 
weakening stationary front. Further East, a stationary front pass
through the Canary Islands near 31N10W to 28N19W to 28N25W. No 
significant convection is noted with the front.

Jerry will move north of the region by Wednesday and pass near 
Bermuda on Thursday. Little chance in strength is forecast through
Fri with a continued north and northeast motion anticipated. 
Meanwhile, Tropical Storm Karen will move north of Puerto Rico 
and the area by Wednesday morning, then continue moving north into
the SW Atlantic late week, slowing in forward speed with time. 

$$
NATIONAL HURRICANE CENTER