Marine Interpretation Message
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
000
AGXX40 KNHC 231709
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
109 PM EDT Wed Aug 23 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...

Recently re-developed Tropical Depression Harvey was near 21.5N
92.5W at 23/1500 UTC, moving northwest, or 310 degrees, at 8 kt.
Maximum sustained winds are 30 kt gusting to 40 kt. Harvey is
forecast to intensify to tropical storm strength this evening,
moving inland over southern Texas Friday night.

Weak low pres in the southeast Gulf will linger over the area
through Thu evening, before moving northeast across central
Florida. This low pressure will have minimal impact on winds and
seas, but may serve as a focus for scattered showers and
thunderstorms over the southeast Gulf.

...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...

Recent scatterometer data along with ship and buoy data indicate
moderate winds over the central Caribbean, gentle to moderate
over the eastern Caribbean, and light to gentle winds over the
western Caribbean as well as the forecast zones in the tropical
north Atlantic waters. Seas are in the 4-6 ft range over the
central Caribbean, 2-4 ft over the eastern Caribbean, 2-3 ft over
the western Caribbean, and 3-4 ft over the tropical north
Atlantic waters. High pressure building north of the area will
tighten the pressure gradient between the ridge and
climatological low pressure over Colombia. This will help pulsing
of strong winds off the coast of northwest Venezuela and
northeast Colombia the next several days. Little change is
expected elsewhere through the next several days.

...SW N ATLANTIC INCLUDING THE BAHAMAS...

A surface trough prevails off the eastern Florida coast while a
ridge of high pressure extends across the area. Recent
scatterometer data along with ship and buoy data indicate light
to gentle winds prevail over the area. Seas are in the 3-4 ft
range outside the Bahamas, and 1-2 ft west of the Bahamas. The
subtropical ridge will gradually build along 28N into Fri with
little change in winds or seas. The main forecast issue
continues to be the emergence of weak low pressure off the coast
of northeast Florida toward the end of the week into the weekend.
Currently, the low looks to deepen north of the forecast waters,
which will keep the main marine impacts north of the discussion
area.

$$

.WARNINGS...Any changes impacting coastal NWS offices will be
coordinated through AWIPS II Collaboration Chat, or by
telephone:

.GULF OF MEXICO...
.GMZ011...NW GULF INCLUDING STETSON BANK...
     Tropical Storm Warning Thu night.
.GMZ017...W CENTRAL GULF FROM 22N TO 26N W OF 94W...
     Tropical Storm Warning tonight into Thu night.
.GMZ019...CENTRAL GULF FROM 22N TO 26N BETWEEN 87W AND 94W...
     Tropical Storm Warning tonight into Thu night.

.CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...
     None.

.SW N ATLANTIC INCLUDING THE BAHAMAS...
     None.

$$

*For detailed zone descriptions, please visit:
http://www.nhc.noaa.gov/abouttafbprod.shtml#OWF

Note: gridded marine forecasts are available in the National
Digital Forecast Database (NDFD) at:
http://www.nhc.noaa.gov/marine/grids.php

For additional information, please visit:
http://www.nhc.noaa.gov/marine

$$

.Forecaster AL. National Hurricane Center.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.