000 AXNT20 KNHC 082325 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 725 PM EDT Tue Aug 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 1800 UTC surface analysis and satellite imagery through 2315 UTC. ...SPECIAL FEATURE... Tropical Storm Franklin is centered near 20.2N 90.3W at 08/2100 UTC or about 22 nm NNE of Campeche Mexico, moving WNW at 10 kt. Estimated minimum central pressure is 1001 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Scattered strong convection is located over the eastern two-thirds of the Yucatan peninsula. See the latest NHC Intermediate Public Advisory under AWIPS/WMO headers MIATCPAT2/WTNT32 KNHC and the full Forecast/Advisory under AWIPS/WMO headers MIATCMAT2/WTNT22 KNHC for more details. ...TROPICAL WAVES... A tropical wave extends its axis from 21N23W to 09N24W, moving west at 10 kt. The wave is well depicted in the 700 mb streamline analysis. However, only minimal convection is associated with it. A tropical wave extends its axis from 22N49W to a 1012 mb low near 16N52W to 10N54W, moving west at 10-15 kt. This wave is also well depicted in the 700 mb streamline analysis. Scattered moderate to strong convection is observed from 16N-23N between 45W-52W. A tropical wave extends its axis from 20N73W to 10N73W, moving west at 10-15 kt. The wave is beneath a mid/upper-level trough with the axis along 73W and north of 17N. Scattered moderate convection is located over the northern third of the wave primarily over Hispaniola and surrounding waters. ...ITCZ/MONSOON TROUGH... The monsoon trough extends from the African coast near 17N16W to 10N23W to 08N28W to 12N41W. No significant convection is observed at this time along the portion of the monsoon trough that prevails over the water. ...DISCUSSION... GULF OF MEXICO... Tropical Storm Franklin continues tracking across the Yucatan peninsula and will move into the Bay of Campeche later tonight. Please refer to the section above for details. A middle/upper level inverted trough is located over the western Gulf with the axis along 97W/98W and is forecast to move west and gradually weaken. Broad anticyclonic flow aloft covers the remainder of the Gulf. A weak surface ridge extends from across northern Florida to the Louisiana coast. Isolated showers and thunderstorms are occurring across the northern half of the Gulf as a frontal boundary remains over land in the proximity. CARIBBEAN SEA... Tropical Storm Franklin continues tracking across the Yucatan peninsula and will move into the Bay of Campeche later tonight. Please refer to the section above for details. Scattered showers and thunderstorms are occurring over the far west Caribbean north of 18N and west of 84W affecting the Yucatan Channel and Peninsula, as well as the western tip of Cuba. A tropical wave is moving across the central Caribbean mainly affecting Hispaniola with scattered showers and thunderstorms. Refer to the section above for more details. Fair weather prevails across the remainder of the basin. Scatterometer data depicts moderate to fresh trades across the area, with higher speeds over the south-central waters within 90 nm north of the Colombian/Venezuelan coast. A similar weather pattern is expected during the next 24 hours. ...HISPANIOLA... A tropical wave is producing increasing cloudiness with scattered showers and thunderstorms over the western portion of the island. As the wave continues moving west, this activity will dissipate. ATLANTIC OCEAN... Two tropical waves are moving across the basin. Refer to the section above for details. A large and well-defined mid/upper level cyclonic circulation is located in the western Atlantic and centered near 21N73W and is forecast to move westward over the next two days enhancing convection. At this time, the low is reflected at the surface as a trough that extends from 25N70W to 21N73W with scattered showers and thunderstorms affecting the southern Bahamas. A pair of 1022 mb surface highs are centered near 28N56W and 29N33W supporting fair weather. For additional information please visit http://www.hurricanes.gov/marine $$ ERA