Tampa Weather

Marine Data

Below you'll find the latest marine forecast for our area. This forecast updates daily.


marine weather discussion
NWS National Hurricane Center Miami FL
250 am EST Wed Nov 22 2017

Marine weather discussion for the Gulf of Mexico, Caribbean Sea,
and tropical North Atlantic from 07n to 19n between 55w and 64w
and the southwest North Atlantic including the Bahamas

...Gulf of Mexico...

A rather complex weather pattern is noted over the Gulf waters. A
1011 mb low pressure has developed over the NW Gulf near 27n92w
while a cold front is approaching to the coast of Texas. Another
1012 mb low pressure is over the NE Gulf with a stationary front
extending eastward across northern Florida. A vigorous short-wave
trough over the NW Gulf supports this weather pattern. Doppler
radar shows scattered showers and thunderstorms over the NW Gulf.
The low over the NE Gulf will rapidly track east-northeastward
across N central Florida into the Atlantic Ocean today. The cold
front currently approaching the coast of Texas will merge with
the second low pressure located over the NW Gulf. Gale conditions
are expected this morning in the wake of the front across the
west-central Gulf, spreading across the SW Gulf early this
afternoon. Wave model guidance suggests that combined seas will
peak to a maximum of around 14 ft with these gale force conditions
tonight before subsiding to around 10 ft early Thursday night
and to less than 8 ft early on Friday as high pressure settles
back over the entire area. The related pressure gradient will
bring generally moderate to fresh northerly flow through Friday
night and light to gentle northerly flow Saturday through Sunday
night, except for light anticyclonic flow over the central Gulf
on Saturday and over the NW Gulf on Sunday. Seas will lower to
2-3 ft over the entire waters on Saturday, except for the se part
of the Gulf where seas will be higher in the 3-5 ft range due to
a NW swell.

...Caribbean Sea and tropical N Atlantic from 07n to 19n between
55w and 64w...

A surface trough persists across the basin and now extends from
eastern Cuba near 21n78w to 17n81w to 11n80w. Isolated showers
are along and near the trough forecast to linger over the west-
central Caribbean through at least Friday. Scatterometer data
detected a NE to se wind shift of mainly gentle winds across the
trough axis, with the exception of moderate northerly winds just
off the coast of Nicaragua. Moderate to locally fresh easterly
winds are noted over the eastern Caribbean, with mainly fresh
winds off the coast of Venezuela, including also the ABC Islands.
Winds will diminish over the S central and se portion late this
week as high pressure N of the area weakens in response to the
developing low pressure along the East Coast of the United
States. Seas will be quite low, in the 2-4 ft range for the next
few days. The weak pressure gradient should remain in place over
the Caribbean until Thursday, when a cold front will enter the NW
Caribbean from the Gulf of Mexico. Model guidance indicates that
the front will then stall and weaken over the NW Caribbean
Friday. The pressure gradient between building high pressure over
Central America and the frontal boundary should bring an increase
in northerly winds of mostly 20 kt with possible pockets of 25
kt within about 120 nm off the Nicaragua coast Thursday night
through Sunday night along with Max combined seas of 6 or 7 ft.

...SW N Atlantic including the Bahamas...

A ridge dominates the waters NE of the Bahamas, while lower
pressures are noted between the Bahamas and Cuba, and also over
Florida and regional Atlantic waters due to the presence of a
couple of surface troughs. A stationary front, extending from a
1012 mb low pressure located over the NE Gulf of Mexico, crosses
the NW portion of the forecast area. Under this weather pattern,
scatterometer data show an area of fresh to strong E to se winds
across the waters N of 22n and E of a line from 31n75w to 22n72w.
As previously mentioned, the low pressure situated over the NE
Gulf of Mexico will rapidly track east-northeastward across N
central Florida into the Atlantic Ocean today dragging a cold
front across the NW and central waters through Saturday night.
Scattered to numerous showers and thunderstorms with gusty winds
are expected with both the low and the cold front. Another low
will form over the NE waters today, and quickly track northeastward
crossing just se of Bermuda tonight into early Thu morning.
Strong to near gale force winds are expected with southerly flow
to the E and se of the low beginning later today as the gradient
between it and strong central Atlantic high pressure tightens.
This low will push a weak frontal boundary across the central and
eastern waters through Thu. Another low pressure system will move
across Florida into the SW N Atlantic by Fri evening. The associated
cold front will move across the forecast area through sun.


.Warnings...Any changes impacting coastal NWS offices will be
coordinated through AWIPS ii collaboration chat, or by

.Gulf of Mexico...
.gmz017...W central Gulf from 22n to 26n W of 94w...
Gale Warning today.
.Gmz023...SW Gulf S of 22n W of 94w...
Gale Warning today into Thu.

.Caribbean Sea and tropical N Atlantic from 07n to 19n between
55w and 64w...

.SW N Atlantic including the Bahamas...


*For detailed zone descriptions, please visit:

Note: gridded marine forecasts are available in the National
digital forecast database (ndfd) at:

For additional information, please visit:


.Forecaster gr. National Hurricane Center.


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