000 AXNT20 KNHC 092355 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 755 PM EDT Wed Aug 9 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 2345 UTC. ...SPECIAL FEATURES... The now Hurricane Franklin is centered near 20.1N 94.9W at 09/2100 UTC or about 152 nm east-southeast of Tuxpan Mexico, moving west at 10 kt. Estimated minimum central pressure is 984 mb. Maximum sustained wind speed is 65 kt with gusts to 80 kt. Numerous strong convection is from 16N-25N between 92W-100W. 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 is in the east Atlantic with axis extending from 20N28W to 07N31W, moving west at 10-15 kt. The wave is experiencing extensive Saharan dry air and dust intrusion to its environment, which is hindering convection at the time. A tropical wave is in the central Atlantic with axis extending from 24N54W to a 1014 mb low near 18N57W to 10N58W, and is moving west at 10 kt. Shallow moisture along with upper-level diffluent flow support scattered moderate convection from 16N-26N between 52W-59W. Environmental conditions are forecast to become somewhat conducive for development of this system late this week and this weekend while it move west over the western Atlantic. A tropical wave extends is in the west Caribbean with axis extending from 22N80W to 10N83W, moving west at 20-25 kt. A cluster of heavy showers and thunderstorms is west of the wave's axis enhancing convection across Central America. Scattered showers are also noted over the northern portion of the wave affecting central Cuba and adjacent waters. ...ITCZ/MONSOON TROUGH... The monsoon trough extends from the African coast near 14N17W to 07N38W. The Intertropical Convergence Zone extends from 07N38W to 10N50W. Scattered showers are observed along the ITCZ. ...DISCUSSION... GULF OF MEXICO... Hurricane Franklin continues its track to the west across the southwest waters. Numerous moderate to strong convection is south of 24N and west of 92W. Rapid weakening is expected after Franklin makes landfall over Mexico tonight. For further information, please see the Special Features section above. Isolated showers and tstms are across SW Louisiana and adjacent coastal waters associated with a 1015 mb low over south Texas and a stationary front that extends across the Gulf states. Fair weather and gentle to moderate southeast winds prevail elsewhere across the basin. A surface ridge will build across the area in the wake of the storm by this upcoming weekend. CARIBBEAN SEA... A tropical wave is moving across the west Caribbean while another one approaches from the east. Refer to the section above for details. Scattered showers and thunderstorms are south of 11N mainly associated with the EPAC's monsoon trough that extends from Costa Rica to Panama to northwest Colombia. In the southeast portion of the basin, shallow moisture and upper-level diffluence support isolated showers south of 13N east of 65W affecting the Windward Islands and adjacent waters. Water vapor imagery show dry air across the remainder Caribbean, which supports fair weather. Scatterometer data depicts fresh to strong winds in the central basin between 70W and 76W. These conditions will prevail through the next two days. Moderate to fresh trades prevail elsewhere. ...HISPANIOLA... Isolated showers are noted across Haiti mainly caused by daytime heating and orographic lifting. Dry conditions will prevail through the next few days as a deep layer dry airmass settles over the island. ATLANTIC OCEAN... Two tropical waves are moving across the basin. Refer to the section above for details. A surface trough is moving across the northern Bahamas supporting scattered showers and thunderstorms from 22N-26N between 75W-80W. Over the north-central waters, with lack of upper level support, a stationary front continues to weaken along 31N40W to 28N50W to 28N58W. Isolated showers are within 120 nm on either side of the front. A 1021 mb high is centered near 28N35W, which is forecast to dissipate by Thu morning. For additional information please visit http://www.hurricanes.gov/marine $$ ERA