000 AXNT20 KNHC 080536 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 136 AM EDT Sat Apr 8 2017 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 0515 UTC. ...ITCZ/MONSOON TROUGH... The Monsoon Trough passes through the coastal sections of Sierra Leone near 08N13W, curving to the Equator along 22W, to 02S28W, 01S40W, to the coast of Brazil near 02S45W. Convective precipitation: isolated moderate to locally strong from 10N southward from 52W eastward. ...DISCUSSION... ...THE GULF OF MEXICO... Middle level to upper level NW wind flow covers the northern one- third of the Gulf of Mexico. This wind flow is related to a deep- layer trough that is along the Eastern coast of the U.S.A. from Florida northward. Upper level W-to-NW wind flow covers the rest of the area. The upper level wind flow is pushing high level moisture from Mexico across the open Gulf waters to the Straits of Florida. Surface anticyclonic wind flow spans the entire area. A 1022 mb high pressure center is near 28N93W in the NW corner of the area. One ridge extends from the 1022 mb high center toward Florida and Cuba. A second ridge extends from the 1022 mb high center into the SW corner of the Gulf of Mexico. ...LOW LEVEL CLOUD CEILINGS AND WEATHER FOR THE OFFSHORE OIL PLATFORM SITES THAT ARE IN THE AREA WHOSE BOUNDARIES ARE FROM 27N NORTHWARD AND FROM 88W WESTWARD... LIFR: none. IFR: none. MVFR: KHHV and KIKT. LOW LEVEL CLOUD CEILINGS AND WEATHER...FOR THE COASTAL PLAINS OF THE U.S.A. FROM THE DEEP SOUTH OF TEXAS TO FLORIDA... from TEXAS to Florida: VFR. ...THE CARIBBEAN SEA... A middle level to upper level trough passes across SE Cuba to 14N78W. Middle level-to-upper level NW wind flow is to the west of the trough. Upper level SW wind flow covers the area that is to the east of the trough. The wind flow from 350 mb to 800 mb is from the E from 70W eastward. Rainshowers are possible, in scattered to broken low level clouds, from 14N northward from 70W eastward, and from 73W westward. 24-hour rainfall totals that are listed for the period that ended at 08/0000 UTC...according to the PAN AMERICAN TEMPERATURE AND PRECIPITATION TABLES...MIATPTPAN/SXCA01 KNHC...0.08 in Guadeloupe. ...HISPANIOLA... Middle level-to-upper level SW wind flow is moving across the island. A cold front passes through 23N74W in the Bahamas, across SE Cuba to 19N81W in the Caribbean Sea. A surface trough is within 90 nm to 120 nm to the E/SE of the cold front, from 17N to 23N. Rainshowers are possible inland, and in the coastal waters. SURFACE OBSERVATIONS...for Port-au-Prince in Haiti: MVFR for visibility. for the DOMINICAN REPUBLIC: Barahona: VFR. Santo Domingo: VFR. La Romana: VFR. Punta Cana: VFR. Santiago: VFR. Puerto Plata: VFR. The GFS MODEL forecast for 250 mb shows that SW wind flow will cover the area during the next 48 hours. The GFS MODEL forecast for 500 mb shows that NW wind flow will be moving across the area at the start of the 48-hour forecast period, with a trough in the Mona Passage. The wind flow will shift and be from the W, and then from the SW, and it will continue from the SW during the rest of forecast period, from the end of day one and during all of day two. The GFS MODEL forecast for 700 mb shows that broad and weak anticyclonic wind flow will cover the area during the next 48 hours. ...THE ATLANTIC OCEAN... A deep-layer trough is along the Eastern coast of the U.S.A. from Florida northward. Cyclonic wind flow covers the Atlantic Ocean from Cuba northward from 60W westward. The trough is supporting a cold front that passes through 32N66W to 27N70W, across the Bahamas near 23N74W, across SE Cuba, to 19N81W in the Caribbean Sea. A surface trough is within 90 nm to 120 nm to the E/SE of the cold front, from 17N to 23N.Convective precipitation: widely scattered moderate to isolated strong within 60 nm to the east of the line that passes through 32N65W 28N68W 24N72W. An upper level cyclonic circulation center is near 28N39W. Cyclonic wind flow covers the area that is from 13N northward between 30W and 51W. A stationary front is along 30N27W 26N32W, to a 1015 mb low pressure center that is near 24N38W. A surface trough continues from the 1015 mb low pressure center to 20N39W and 17N42W. A 1016 mb low pressure is near 32N45W. A surface trough is along 32N42W 30N41W 27N42W 25N45W 25N49W. Convective precipitation: scattered moderate to isolated strong from 22N to 27N between 33W and 38W. A 1021 mb high pressure center is near 28N56W. Surface anticyclonic wind flow covers the area that is from 23N northward between 50W and 62W. For additional information please visit http://www.hurricanes.gov/marine $$ MT