000 AGXX40 KNHC 250724 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 324 AM EDT Fri Aug 25 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... Harvey was upgraded to hurricane status at 24/1800 UTC. At 25/0600 UTC, It is near 25.6N 95.1W, moving toward the NW, or 315 degrees, at 9 kt. Estimated minimum central pressure is 967 mb. Maximum sustained winds have increased to 90 kt with higher gusts. On the forecast track, Harvey will approach the middle Texas coast later today and make landfall tonight or early Saturday. Harvey is then likely to stall near or just inland of the middle Texas coast through the weekend. Harvey is expected to become a major hurricane before it reaches the middle Texas coast. A recent scatterometer pass over Harvey indicates that wind of 20-33 kt extends within 180 nm N semicircle, 210 nm SE quadrant, and 120 nm SW quadrant of the center. See hurricanes.gov for the latest information on Harvey. Farther east, a trough of low pressure persists over the eastern Gulf with a weak 1010 mb low pressure near 27N83W. This system will move across Florida today, and will have minimal impact on winds and seas across the Gulf waters. A band of showers with embedded thunderstorms associated with this low is 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 to fresh winds over the central Caribbean, gentle to moderate over the eastern Caribbean, and light to gentle winds over the western Caribbean. 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. High pressure building north of the area will tighten the pressure gradient between the ridge and the Colombian/Panamanian low. As a result, expect fresh to locally strong winds off the coast of northwest Venezuela and northeast Colombia the next several days with building seas to 8-9 ft by early Saturday morning. Little change is expected elsewhere through the next several days. In the Tropical N Atlantic waters expect gentle to moderate trades and seas in the 4-6 ft range through the forecast period. ...SW N ATLANTIC INCLUDING THE BAHAMAS... As previously mentioned, a weak low pressure is forecast to move across Florida today, entering the SW N Atlantic waters on Saturday. Southerly winds will increase to 20-25 KT across forecast zone AMZ111 tonight through Sunday, with seas building to 5-6 ft. These marine conditions could also impact forecast zone AMZ113 on Monday. Although strong upper-level winds could limit tropical cyclone formation, some subtropical development is possible over the weekend or early next week while the system moves northeastward over the western Atlantic before it merges with a front. The remainder of the area will be under the influence of the subtropical ridge. Moderate to locally fresh easterly winds are expected across the waters S of 22N, and just north of Hispaniola, including also the approaches to the Windward Passage each night from Saturday through Monday. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... .GMZ011...NW GULF INCLUDING STETSON BANK... Hurricane Warning early today into tonight. Tropical Storm Warning Sat. .GMZ013...N CENTRAL GULF INCLUDING FLOWER GARDEN BANKS MARINE SANCTUARY... Tropical Storm Warning early today. .GMZ017...W CENTRAL GULF FROM 22N TO 26N W OF 94W... Hurricane Warning early today into today. .GMZ019...CENTRAL GULF FROM 22N TO 26N BETWEEN 87W AND 94W... Tropical Storm Warning early today. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 GR. National Hurricane Center.