000 AXNT20 KNHC 161013 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 1215 UTC Wed Jul 16 2025 Tropical Weather Discussion for North America, Central America Gulf of America, Caribbean Sea, northern sections of South America, and Atlantic Ocean to the African coast from the Equator to 31N. The following information is based on satellite imagery, weather observations, radar and meteorological analysis. Based on 0600 UTC surface analysis and satellite imagery through 1000 UTC. ...SPECIAL FEATURES... Northeastern and north-central Gulf (AL93): Surface observations indicate that a broad area of low pressure continues to move westward across the Florida Panhandle and southwestern Georgia, and is producing disorganized shower and thunderstorm activity mainly south of its center over the Gulf waters. Recent satellite imagery suggests that a new surface low has formed along the Florida coast near 30N84W, estimated at 1012 mb, with a surface trough extending S-SW and well offshore. This system is forecast to continue moving westward, and could emerge or redevelop over the far northeastern to north-central portion of the Gulf, reaching the coast of Louisiana by Thursday. If this system moves far enough offshore, environmental conditions over the Gulf appear generally favorable for additional development, and a tropical depression could still form over the next couple of days before the system moves fully inland by the end of the week. Regardless of development, heavy rainfall could produce localized flash flooding over portions of Florida through through today. Heavy rainfall could also cause flash flooding for portions of the north-central Gulf Coast beginning late today and continuing through Friday. This system has a medium chance of tropical cyclone development during the next 48 hours and also during the next 7 days. Please refer to the latest NHC Tropical Weather Outlook at www.hurricanes.gov for more details. ...TROPICAL WAVES... A far eastern Atlantic tropical wave is along 22W, south of 22N to 10N, moving westward at 10 kt. A 1014 mb surface low along along the monsoon trough there near 21.5N21.5W. Scattered moderate isolated strong convection is observed from 09N to 14.5N and east of 24W. An Atlantic tropical wave is along 59W, south of 19N, moving westward near 20 kt. Scattered showers are noted north of the wave from 17.5N to 20N between 59W and 64W, and also behind the wave from 05N to 11.5N between 52W and 57W. An eastern Caribbean tropical wave is along 69W, south of 20N, moving westward at 15-20 kt. Scattered moderate convection is noted north of the wave from 20N to 25N between 69W and 73.5W. ...MONSOON TROUGH/ITCZ... The monsoon trough enters the Atlantic through the coast of Mauritania near 20N16W and continues to 1014 mb low pressure near 21.5N21.5W then southwestward to 07N41W. The ITCZ extends from 07N41W to the coast of French Guiana near 05N53W. Scattered moderate convection is found south of 08N and between 26W and 50W. ...GULF OF AMERICA... Please see the Special Features section for more information on AL93 over the Florida Panhandle. Complex middle to upper level low pressure extends from the Bahamas westward across the Gulf and into eastern Texas. Broad low to middle level cyclonic circulation continues to force bands and clusters of moderate to strong convection across the NE Gulf that is shifting westward across the waters south of the Florida Panhandle to the mouth of the Mississippi river. Elsewhere, scattered moderate convection is are noted across much of the SE Gulf waters, while generally dry conditions prevail west of 90W. A 1018 mb high is centered near 27.5N92W and extends a ridge southeast to the Yucatan Peninsula. This pattern is producing a weak pressure gradient across the Gulf, supporting moderate or weaker winds and slight to moderate seas. For the forecast, weak high pressure will meander about the NW Gulf through late Thu. A weak 1012 mb low pressure, Invest AL93, is along the coast of the Florida Big Bend near 30N84W. This system is expected to move generally westward and could emerge or redevelop over the far northeastern to north-central portion of the Gulf, reaching the coast of Louisiana by Thu. If this system moves far enough offshore, environmental conditions over the Gulf appear generally favorable for additional development, and a tropical depression could still form over the next couple of days before the system moves fully inland by the end of the week. Regardless, scattered to numerous showers and thunderstorms, some with strong gusty winds and locally rough seas, will accompany this system. The Atlantic ridge will build westward across the Gulf along 28N over the weekend. ...CARIBBEAN SEA... A sharp upper level trough extends from the central Bahamas southward across eastern Cuba and the Windward Passage to broad upper level low pressure over the SW Caribbean. This feature is providing lift to support scattered moderate convection both east and west of the trough, north of 19N between 74W and 82W. mainly affecting the waters south of Cuba. Fair and stable conditions generally prevail across the rest of the basin. Atlantic high pressure is centered along 32N between 50W and 63W, and extends a ridge westward to just offshore of the Georgia and South Carolina coasts. The pressure gradient south of the ridge is forcing fresh to strong easterly winds and seas of 6-9 ft in the central Caribbean south of 16N, with the strongest winds and highest seas occurring off northern Colombia. Moderate to fresh easterly breezes and moderate seas are prevalent in the eastern Caribbean. Moderate or weaker winds and slight seas are found elsewhere. For the forecast, the Central Atlantic high pressure will gradually build westward across Florida and into the eastern Gulf of America through Sat. Fresh to strong trades and rough seas over the south-central Caribbean will expand across most of the central portions of the basin this evening through Sat morning as the Atlantic high pressure gradually shifts westward to near 75W. These winds are expected to contract in aerial coverage late Sat through Sun as the high pressure weakens. Fresh E winds are expected in the Gulf of Honduras Thu through Sat. Moderate to fresh winds and moderate seas are expected in the eastern Caribbean through the period while gentle to moderate winds and slight to moderate seas will prevail NW portions through Fri. A pair of tropical waves across the eastern Caribbean and Tropical Atlantic waters this morning will race quickly across the basin through Fri, mainly producing active weather across the SW Caribbean waters Fri through Sat. ...ATLANTIC OCEAN... A cold front extends from 31N32.5W to 24N52W, followed by a dissipating. Scattered light showers are evident along this boundary east of 43W. The rest of the basin is dominated by an expansive subtropical ridge centered over the central Atlantic along 32N. The pressure gradient between this ridge and lower pressures associated with Invest 93L over the Florida Panhandle is sustaining moderate to fresh SE to S winds and moderate seas west of 72W. Scattered showers and occurring across the coastal waters of the Leeward Islands, Hispaniola and the southeast Bahamas associated with the two tropical waves. South of the ridge, moderate to fresh easterly winds and moderate seas are evident on recent satellite scatterometer wind data south of 25N and between 55W and 76W. Moderate to fresh winds and moderate seas are present between 35W and the Lesser Antilles and south of 20N. In the rest of the basin, moderate or weaker winds and moderate seas prevail. For the forecast west of 55W, Central Atlantic high pressure will build gradually westward across the region and across Florida today through Sat as low pressure across the NE Gulf of America shifts westward. The pressure gradient between the Atlantic ridge and this low pressure will support moderate to fresh SE to S winds across the Bahamas and through the NW zones through early Thu, then continue across the southern Bahamas through Fri night as the high slides west to 75W. High pressure will then weaken over the weekend. $$ Stripling
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Page last modified: Wednesday, 16-Jul-2025 15:30:10 UTC