Hurricane and Tropical Cyclones
Tropical Weather Discussion
000 axnt20 knhc 302348 twdatTropical weather discussion NWS National Hurricane Center Miami FL 748 PM EDT sun Apr 30 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 1800 UTC surface analysis and satellite imagery through 2315 UTC....Special features...As of 30/2100 UTC, a cold front extends over the Gulf of Mexico from se Louisiana at 29n91w to 23n94w to the Bay of Campeche at 19n94w. A small 1005 mb low is at the base of the front at 19n94w. Gale force winds are from 19n-21n W of front. The gale is expected to continue for a few more hours until 01/0000 UTC. The surface pressure gradient is expected to relax as the front moves quickly east. Please refer to the latest National Hurricane Center High Seas Forecast under AWIPS/WMO headers miahsfat2/fznt02 knhc, for more details....ITCZ/monsoon trough...The monsoon trough extends form the coast of west Africa near 10n13w to 05n18w. A surface trough is off the coast of west Africa from 09n20w to 01n21w moving W at 10 kt. The ITCZ extends from 03n23w to 01n30w to 01n42w to the coast of South America near 01s47w. Widely scattered moderate convection is from 5s-6n between 20w-50w....Discussion...Gulf of Mexico...As of 30/2100 UTC, a cold front extends over the Gulf of Mexico from se Louisiana at 29n91w to 23n94w to the Bay of Campeche at 19n94w. A small 1005 mb low is at the base of the front at 19n94w. Gale force winds are from 19n-21n W of front. 15-30 kt N winds are over the remainder of the W Gulf, W of front. A squall line is within 90 nm E of the front, N of 26n. Scattered moderate to strong convection is along the squall line. Radar imagery shows scattered moderate convection over W Cuba. Isolated showers are over the Florida Keys, and The Straits of Florida. Areas of smoke are over the Gulf moving N, basically E of front from S Mexico to the Florida Panhandle, restricting visibility. In the upper levels, an upper level trough is over Texas and the NW Gulf. A ridge is over the E Gulf with axis along 82w. Broken high clouds NE Gulf. Expect the front in 24 hours to extend from the Florida Panhandle to the se Bay of Campeche with showers and convection.Caribbean Sea...15-25 kt tradewinds are over the Caribbean Sea with strongest winds over the central Caribbean. Scattered moderate convection is over Cuba, Jamaica, Hispaniola, Puerto Rico, NW Venezuela, N Colombia, Panama, Costa Rica, Honduras, and Guatemala. Scattered showers are over the Leeward Islands. In the upper levels, a ridge is over the W Caribbean with axis along 82w. An upper level trough is over the E Caribbean E of 70w. Expect similar weather over the next 24 hours, especially during the afternoon and evening hours. Also expect additional convection over the Leeward Islands....Hispaniola...Presently scattered scattered showers and isolated thunderstorms are over the island due to maximum diurnal heating, and upper level diffluence. Expect a lessening of precipitation tomorrow, as most convection shifts E towards the Leeward Islands.Atlantic Ocean...A 1027 mb high is over the W Atlantic near 31n68w. An area of scattered showers are N of Puerto Rico and the Leeward Islands from 20n-24n between 60w-70w. Another 1024 mb high is over the E Atlantic near 32n31w. A surface trough is NW of the Cape Verde Islands from 22n27w to 16n27w. Of note in the upper levels, a small upper level low is centered over the W Atlantic near 24n69w. An upper level trough is over the central Atlantic N of 20n between 40w-60w. Another small upper level low is over Morocco.For additional information please visit http://www.Hurricanes.Gov/marine$$ Formosa
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