


Tropical Weather Discussion
Issued by NWS
Issued by NWS
382 AXNT20 KNHC 151030 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 1215 UTC Tue Jul 15 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... East of the Florida Peninsula into the Northeastern Gulf (AL93): Recent satellite-derived scatterometer wind data indicated that the area of low pressure located just offshore of the east coast of Florida is gradually becoming better defined, with a 1014 mb low center analyzed near 29N79.5W. However, the shower and thunderstorm activity remains disorganized as upper level northerly winds are inducing wind shear across the area. This system is forecast to move westward across the Florida Peninsula today through tonight, then reach the northeastern Gulf by the middle part of this week. Environmental conditions appear generally favorable for additional development, and a tropical depression could form by the middle to latter part of this week as the system moves across the northeastern and north-central Gulf. Regardless of development, heavy rainfall could produce localized flash flooding over portions of Florida through mid-week. Heavy rainfall could also cause flash flooding for portions of the north-central Gulf Coast during the middle to latter portions of this week. 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 central Atlantic tropical wave is along 52W, south of 20N, moving westward at around 20 kt. Scattered showers and thunderstorms are noted from 06N to 09.5N between 48W and 55W. A tropical wave is analyzed along 63W, south of 20N and moving westward at around 15 kt. The wave is enhancing the rainfall in NE South America, while a small cluster of scattered moderate convection follows the wave from 11N to 14N between 58W and 61W. ...MONSOON TROUGH/ITCZ... The monsoon trough enters the Atlantic through the coast of Mauritania near 20.5N17W and continues southwestward to 10N27W and to 06N42W. The ITCZ extends from 06N42W to 06N51W. Scattered moderate to strong convection is observed from 10N to 12.5N E of 18W, and from 04.5N to 08.5N between 28W and 43W. ...GULF OF AMERICA... Bands of scattered to numerous showers and thunderstorms continue across the eastern Gulf waters indirectly associated with the low pressure system off eastern Florida (AL93). This active convection has continued throughout the night and is moving west and southwestward away from the Florida coast. Mariners in the area can expect gusty winds, heavy downpours, frequent lightning strikes and suddenly higher seas. Except for a few showers across northwest portions, generally dry conditions are present elsewhere. At the surface, a 1020 mb high pressure centered south of Louisiana near 27N90.5W and supports moderate to fresh E to SE winds and moderate seas to 5 ft south of a line from SE Texas to NE Yucatan. In the rest of the basin, outside of the areas of convection, light to gentle winds and slight seas prevail. For the forecast, high pressure across the north-central basin will drift slowly W-NW and settle across the NW Gulf through Thu. A 1014 mb low pressure is just offshore of central Florida near 29N79.5W and is forecast to move westward across Florida later today and tonight, and eventually emerge over the northeastern Gulf late Tue or early Wed. Environmental conditions appear generally favorable for additional development, and a tropical depression could form by the middle to latter part of this week as this system moves across the northeastern and north-central Gulf. Regardless, scattered to numerous showers and thunderstorms, some with strong gusty winds, will accompany this system. ...CARIBBEAN SEA... A sharp upper level trough across eastern Cuba and the Windward Passage continues to support scattered showers and a few thunderstorms between eastern Cuba and Jamaica, and across the Windward Passage. No significant convection is noted elsewhere across the basin this morning. Surface high pressure north of the area along 29N is forcing fresh to strong easterly trade winds in the central Caribbean south of 16N and across the Gulf of Honduras. These winds are sustaining moderate to rough seas, peaking near 9 ft off NW Colombia. Moderate to locally fresh easterly breezes and moderate seas are evident in the eastern Caribbean. Light to gentle winds and slight seas prevail elsewhere. Saharan Air accompanies a tropical wave entering the eastern Caribbean, where a few showers are seen across the Leeward Islands. For the forecast, a weak ridge along 29N and E of 75W 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 Wed through Sat as the Atlantic high pressure shifts due north of the area. 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 in the NW portions. A pair of tropical waves will move through the basin through Fri, mainly producing active weather across the SW Caribbean waters Fri through Sat. ...ATLANTIC OCEAN... A 1014 mb low pressure system (AL93) centered off Cape Canaveral near 29N79.5W continues to produce scattered showers and thunderstorms west of 77W and across the NW Bahamas and the Florida coastal waters south of 29N. Recent satellite scatterometer data captured fresh to strong S to SW winds within 90 across the south and east portions of this feature. To the east, a 1025 mb high is centered near 31N57W, and extends a ridge W-SW to 75W. Farther east, a cold front extends from the NE Atlantic and enters the area near 31N39W to 29N50W. Scattered showers and thunderstorms are noted within 60 nm ahead of this boundary. Moderate to locally fresh W to NW winds and moderate seas are found north of 28N and between 35W and 50W associated with this front. The rest of the tropical Atlantic is dominated by a persistent subtropical ridge that supports moderate to locally fresh SE to S winds and moderate seas to 5 ft west of 60W. To the south of the ridge, mainly moderate to locally fresh easterly winds and moderate seas are found south of 26N and between 25W and 60W. Lastly, in the far eastern Atlantic, moderate to locally strong NE winds and seas of 5-8 ft are occurring north of 20N and east of 25W. Elsewhere within the ridge, moderate or weaker winds and moderate seas prevail. For the forecast west of 55W, a weak ridge along 29N extends from the central Atlantic to 75W this morning, while a 1014 mb low has formed near 29N79.5W. The low is expected to move westward across Florida later today through tonight, and eventually emerge over the northeastern Gulf of America by late tonight or early Wed. Environmental conditions appear favorable and some development of this system is possible today before it moves over the Florida Peninsula. High pressure over the central Atlantic will then build westward across the region and across Florida late tonight through Sat in the wake of the low pressure. Active thunderstorms are expected in association with this system over the waters west of 76W through tonight. The pressure gradient between the Atlantic ridge building westward and the low pressure will support moderate to fresh SE to S winds across the Bahamas and through the NW zones today through early Thu. $$ Stripling