000 AXNT20 KNHC 150525 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 0605 UTC Tue Sep 15 2020 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. ...SPECIAL FEATURES... Hurricane Sally is centered near 28.9N 87.6W at 15/0300 UTC or 80 nm E of the mouth of The Mississippi River moving WNW at 3 kt. Estimated minimum central pressure is 986 mb. Maximum sustained wind speed is 85 kt with gusts to 105 kt. Peak seas are currently to 24 ft. Numerous moderate to strong convection is noted from 27N-32N between 86W-90W. Scattered moderate and isolated strong convection is noted elsewhere from 25N-32N between 82W-86W. Some strengthening is forecast early Tuesday and Sally is expected to be a dangerous hurricane when it moves onshore along the north-central Gulf coast. A northward turn is likely by Tuesday afternoon, and a slow north-northeastward to northeastward motion is expected Tuesday night through Wednesday night. On the forecast track, the center of Sally will move near the coast of southeastern Louisiana tonight and Tuesday, and make landfall in the hurricane warning area Tuesday night or Wednesday. Please read the latest NHC Public Advisory at: https://www.nhc.noaa.gov/text/MIATCPAT4.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMAT4.shtml for more details. Hurricane Paulette is centered near 35.7N 62.3W at 15/0300 UTC or 240 nm NNE of Bermuda moving NE at 15 kt. Estimated minimum central pressure is 965 mb. Maximum sustained wind speed is 90 kt with gusts to 110 kt. Peak seas are currently well N of 32N. Numerous moderate and scattered strong convection is noted within 90 nm in the NE semicircle and within 60 nm in the SW semicircle of Paulette. Scattered moderate convection is noted elsewhere within 300 nm in the NE semicircle and within 120 nm in the SW semicircle. Strengthening is possible Tuesday and early Wednesday. Rapid weakening is forecast to begin by late Wednesday and will likely continue through the rest of the week. A faster motion toward the northeast or east-northeast is expected for the next couple of days. Paulette is then forecast to slow down and turn eastward by late Thursday. Please read the latest NHC Public Advisory at: https://www.nhc.noaa.gov/text/MIATCPAT2.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMAT2.shtml for more details. Tropical Storm Teddy is centered near 13.2N 45.0W at 15/0300 UTC or 960 nm E of the Lesser Antilles moving W at 11 kt. Estimated minimum central pressure is 1002 mb. Maximum sustained wind speed is 45 kt with gusts to 55 kt. Peak seas are currently to 15 ft. Scattered to numerous moderate convection is noted from 08N- 16N between 38W-50W. Strengthening is forecast for the next several days. Teddy is expected to become a hurricane Tuesday and could reach major hurricane strength on Thursday. A west-northwestward motion at a slower forward speed is expected overnight through Tuesday night, followed by a northwestward motion Wednesday and Thursday. Please read the latest NHC Public Advisory at: https://www.nhc.noaa.gov/text/MIATCPAT5.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMAT5.shtml for more details. Tropical Storm Vicky is centered near 19.5N 29.9W at 15/0300 UTC or 400 nm WNW of the Cabo Verde Islands moving NW at 6 kt. Estimated minimum central pressure is 1000 mb. Maximum sustained wind speed is 45 kt with gusts to 55 kt. Vicky continues to be a sheared tropical storm with scattered moderate and isolated strong convection noted from 19N-23N between 22W-29W. A turn toward the west-northwest is expected within the next day or so, followed by a turn toward the west. Weakening is forecast due to strong upper-level winds during the next 48 hours, and Vicky is likely to degenerate into remnant low by Wednesday. Please read the latest NHC Public Advisory at: https://www.nhc.noaa.gov/text/MIATCPAT1.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMAT1.shtml for more details. ...TROPICAL WAVES... A tropical wave axis is offshore of the W coast of Africa with axis along 19W, moving W at around 10 kt. Scattered moderate and convection is noted from 06N-14N between 14N-25N. This area has a low chance of developing into a tropical cyclone during the next 48 hours. ...MONSOON TROUGH/ITCZ... The monsoon trough axis extends from the coast of Mauritania near 20N16W to 18N23W. The eastern Pacific monsoon trough extends from northern Colombia near 10N76W then across Panama and Costa Rica. Scattered moderate convection is noted in the SW Caribbean S of 13N and W of 78W. GULF OF MEXICO... Please refer to the Special Features section above for details on Hurricane Sally. Elsewhere, a 1010 mb surface low is centered in the west-central Gulf near 23N95W along a surface trough that extends from 26N94W to 21N95W. Scattered showers are noted along the trough and in the vicinity of the low. This area has a low chance of developing into a tropical cyclone during the next 48 hours. Scatterometer data depicts moderate to fresh NW-N winds are noted west of the trough, with gentle to moderate winds elsewhere outside of Sally. Hurricane Sally will continue moving northwest while moving onshore over the east-central Gulf. The system will then move northwest while weakening through the end of the week. Elsewhere, the weak low pressure over the southwest Gulf will persist through Thu. Looking ahead, a weak front will move into the northern Gulf by late Sat. CARIBBEAN SEA... Please see the Special Features section for details on Tropical Storm Teddy which is forecast to move within 240 nm NE of the Leeward Islands by Fri. Elsewhere, an upper-level low centered well north of Hispaniola is inducing scattered showers and thunderstorms over the island and adjacent waters north of 17N between 68W-75W. Latest scatterometer data depicts gentle to moderate trades across the basin, with moderate to fresh winds noted within 90 nm north of the Colombian/Venezuelan coastline. Seas are mainly 2-4 ft W of 74W, and 3-5 ft E of 74W. A relatively weak pressure pattern will maintain gentle to moderate trades through late week, with fresh trades pulsing over the south-central Caribbean. ATLANTIC OCEAN... Please see the Special Features section for details on Hurricane Paulette, centered N of 32N, Tropical Storm Teddy, and Tropical Storm Vicky. Swells generated by Paulette are affecting the Greater Antilles, the Bahamas, Bermuda, and the east coast of the United States. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. Elsewhere, an upper-level low is centered near 27N69W. Scattered showers and isolated thunderstorms are noted across Hispaniola and the west Atlantic between 65W-71W. To the east, the remnants of T.D. Rene are analyzed as a 1012 mb low centered near 26N50W. Scattered showers are noted within 60 nm to the NE of the low center. Surface ridging prevails across the remainder of the basin outside of the tropical systems. T.S. Teddy is expected strengthen to a hurricane before reaches the waters well northeast of the Leeward Islands by late Fri, then continue to the NNE east of 65W through late Sat. T.S. Vicky will continue moving west while weakening. A front may approach the waters off northeast Florida by late Sat. $$ ERA