Hurricane and Tropical Cyclones
Tropical Weather Discussion
000 axnt20 knhc 290604 twdatTropical weather discussion NWS National Hurricane Center Miami FL 204 am EDT Sat Apr 29 2017Tropical 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....Special features...The 42-hour forecast consists of a cold front whose position will be 30n92w 26n94w 22n96w 19n96w. Expect NW-to-N gale force winds, and sea heights ranging from 8 feet to 10 feet, within the area that is bounded by 21.5n96.5w to 21.5n97w to 22n97.5w to 23.5n97.5w to 23.5n97w to 23n96.5w to 21.5n96.5w. Please refer to the latest National Hurricane Center High Seas Forecast under AWIPS/WMO headers miahsfat2/fznt02 knhc, for more details.Please refer to the Meteo-France High Seas Forecast, that is listed on the website: www.Meteofrance.Com/previsions-meteo- marine/bulletin/grandlarge/metarea2. Gale-force winds are forecast for the areas: Irving and meteor. An upper level trough passes through 32n14w to 25n25w and 17n30w. A cold front passes through 32n10w to 30n20w, to a 1010 mb low pressure center that is near 27n25w. Convective precipitation: isolated moderate to locally strong from 28n northward between 13w and 24w. Rainshowers are possible elsewhere from 18n northward between Africa and 44w....ITCZ/monsoon trough...The monsoon trough passes through the coastal sections ofsierra Leone near 08n13w to 06n14w. The ITCZ continues from 06n14w, crossing the Equator along 36w, to 02s45w along the coast of Brazil. Convective precipitation: numerous strong from 04n to 09n between 11w and 14w. Scattered moderate to strong from 01n to 05n between 32w and 40w. Isolated moderate to locally strong from 08n southward from 60w eastward....Discussion......The Gulf of Mexico...An upper level ridge is along 86w. High level moisture is covering much of the Gulf of Mexico, except for some parts of the se corner.A surface ridge is along 30n, from 74w in the Atlantic Ocean, into the eastern sections of Texas....Visibility and weather for the offshore oil platform sites that are in the area whose boundaries are from 27n northward and from 88w westward...Mist and haze, with areas of 1 to 3 miles at many of the platform sites, and some smaller areas of 3 to 5 miles.Visibility and weather...for the coastal plains of the U.S.A. From the deep south of Texas to Florida...Texas: mist and haze and 3 to 5 miles in the coastal plains. Louisiana: mist and haze and 3 to 5 miles in some parts of the coastal plains. Florida: light rain in Milton. Mist and 5 miles near Panama City and Perry....The Caribbean Sea...Upper level NW wind flow is moving through much of the Caribbean Sea. Upper level anticyclonic wind flow is from 14n southward from 71w eastward.Upper level anticyclonic wind flow covers the area that is from 14n southward from 80w eastward.24-hour rainfall totals that are listed for the period that ended at 29/0000 UTC...according to The Pan American temperature and precipitation tables...miatptpan/sxca01 knhc...are 0.76 in Guadeloupe....Hispaniola...The southernmost part of a middle level-to-upper level trough is spreading broad cyclonic wind flow across the island. Convective precipitation: rainshowers are possible, inland and in the coastal waters.Surface observations...for Port-au-Prince in haiti: VFR. For the dominican republic: barahona: VFR. Few cumulonimbus clouds. Santo domingo: MVFR. Ceiling 1600 feet. La romana: MVFR. Ceiling 1600 feet. Punta cana: nearby rainshowers. VFR. Few cumulonimbus clouds. Santiago and Puerto plata: VFR. Few cumulonimbus clouds.The GFS model forecast for 250 mb shows that a trough will be moving across the area during the next 6 hours to 12 hours. NW wind flow will move across the area during the rest of the 48- hour forecast period. The GFS model forecast for 500 mb shows that broad cyclonic wind flow will move across the area during the next 48 hours. The GFS model forecast for 700 mb shows that more than one inverted trough will move across Hispaniola during the next 48 hours. Expect periods of broad cyclonic wind flow....The Atlantic Ocean...A middle level-to-upper level cyclonic circulation center is near 23n72w. A trough passes through 32n66w to the northern coastal areas of Haiti. Convective precipitation: broken to overcast multilayered clouds and isolated moderate from 15n in the Caribbean Sea,to 27n in the Atlantic Ocean, between 60w and 74w.A middle level-to-upper level trough passes through 32n52w, to 26n53w. Convective precipitation: rainshowers are possible from 16n northward between 50w and 60w.Surface anticyclonic wind flow covers the Atlantic Ocean from 10n northward between 30w and 80w.For additional information please visit http://www.Hurricanes.Gov/marine$$ Mt
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