--------------------------------------------------------------------------- TROPICAL WEATHER DISCUSSION (NORTH ATLANTIC AREA) MESSAGES T1T2: AX A1A2: NT Date: 2026-04-11 --------------------------------------------------------------------------- Message File: T_AXNT20KNHC110609_C_KWBC_20260411060959_9109880-958-TWDAT.txt ****0000004379**** AXNT20 KNHC 110609 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 0615 UTC Sat Apr 11 2026 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 0000 UTC surface analysis and satellite imagery through 05 UTC. ...MONSOON TROUGH/ITCZ... A monsoon trough remains mostly over the Africa Continent. An ITCZ extends southwestward from 04N13W through 00N29W to near Sao Luis, Brazil. Scattered moderate to isolated strong convection is noted up to 200 nm along either side of the ITCZ. ...GULF OF AMERICA... A broad surface ridge extends southwestward from northern Florida to near Veracruz, Mexico. Moderate to fresh NE to E winds and seas of 4 to 7 ft exist at the north-central Gulf, Florida Straits and eastern Bay of Campeche. Gentle to moderate NE to E winds with 2 to 4 ft seas prevail for the rest of the Gulf. For the forecast, the broad surface ridge will maintain mostly moderate to fresh E winds across the Gulf through Sat night. The ridge is expected to strengthen some through late Sun night while gradually shifting northward through early next week before weakening into midweek. A tightening pressure gradient between the ridge and lower pressure to its southeast associated with a frontal boundary will funnel pulsing fresh to strong E winds through the Straits of Florida and into the southeastern Gulf starting on Mon. Seas across the Gulf will be at a mostly moderate state, except reaching a rough state, at times, in the Straits of Florida beginning on Mon. ...CARIBBEAN SEA... A fair trade-wind regime persist across much of the Caribbean Sea. Strong to locally near-gale NE to ENE winds and seas at 5 to 9 ft are present at the south-central basin, including the Gulf of Venezuela. Mostly fresh NE winds and 3 to 5 ft seas exist at the lee of Cuba and near the Windward Passage. Gentle to moderate NE to E winds and seas of 3 to 6 ft prevail elsewhere in the Caribbean Sea. For the forecast, strong high pressure building southward from the western Atlantic will tighten the pressure gradient and increase winds over the basin. This is going to sustain strong winds over the south-central basin into early next week. Fresh to strong NE winds and building seas will prevail south of Cuba, in the Windward Passage, and south of Hispaniola starting on Sat night. ...ATLANTIC OCEAN... A cold front extends southwestward from just east of Bermuda across 31N64W and Turks and Caicos Islands to eastern Cuba. Convergent southerly winds are triggering scattered moderate convection up to 210 nm southeast of this boundary east of 70W. A surface trough embedded within the trades is producing scattered showers east of the Lesser Antilles from 11N to 20N between 50W and 60W. Refer to the Monsoon Trough/ITCZ section at the beginning for additional convection in the Atlantic Basin. Moderate to fresh NE winds and seas of 8 to 10 ft are evident behind the cold front, except seas in the Bahamas are 5 to 7 ft. East of the front, fresh to strong SE to S winds and 8 to 10 ft are noted north of 28N between 52W and the front. To the south, gentle to moderate SE to S winds and seas at 6 to 8 ft are present. For the remainder of the Atlantic Basin west of 35W, moderate to fresh NE to E winds and seas of 7 to 9 ft in large NE to E swell prevail. For the forecast west of 55W, a strong high pressure near the U.S. Mid-Atlantic coast is building southward behind the aforementioned cold front. The pressure gradient between these two features will maintain mostly fresh NE winds west of the front through Sun. Winds become locally strong starting Sun night as the high pressure strengthens some. The winds then diminish back to mostly fresh starting Tue south of 28N as the high pressure weakens, with an associated ridge near 31N. Rough seas from large NE swell will linger into the start of next week between Bermuda and the Bahamas. $$ Chan ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXNT20KNHC111047_C_KWBC_20260411104806_9109880-971-TWDAT.txt ****0000005009**** AXNT20 KNHC 111047 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 1215 UTC Sat Apr 11 2026 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 1030 UTC. ...MONSOON TROUGH/ITCZ... The monsoon trough axis remains mostly over the Africa Continent. The ITCZ extends southwestward from 03N12W to 01N32W and to near 02N43W. Scattered moderate to isolated strong convection is within 120 nm north of the ITCZ between 11W and 18W and within 120 nm south of the ITCZ between 13W and 17W. Scattered moderate convection is within 180 nm north of the ITCZ between 32W and 36W and within 60 nm south of the ITCZ between 35W and the coast of Brazil. ...GULF OF AMERICA... Broad ridging stretches from the southeastern U.S. southwestward to central Texas. The related gradient is allowing for mostly moderate to fresh east winds across just about the entire basin. Seas are 5 to 7 ft east of 90W and south of 26N and 4 to 6 ft elsewhere, except for slightly lower seas of 3 to 5 ft in the SW Gulf. For the forecast, the moderate to fresh east winds should persist through tonight. The high pressure will strengthen some through late Sun night as it shifts eastward over the western Atlantic through early next week before it weakens into midweek. A ridge will stretch west-southwestward from the high to across the northern Gulf through the period. A tightening pressure gradient between the ridge and lower pressure to its southeast associated with a frontal boundary will funnel pulsing fresh to strong east winds through the Straits of Florida and into the southeastern Gulf starting on Mon. Seas across the basin will be at a mostly moderate state, except, at times, reaching a rough state in the Straits of Florida beginning on Mon. ...CARIBBEAN SEA... The present synoptic weather pattern, with a frontal system over the western Atlantic and building high pressure behind it is keeping fresh to strong trades confined to the south-central section of the sea, namely south of about 16N and between 70W and 78W. Seas with these winds are 7 to 10 ft. Fresh northeast winds have recently develop in the lee of Cuba and in the Windward Passage. Moderate to fresh trades are elsewhere south of 17N east of 85W, and gentle to moderate northeast to east winds are elsewhere in the western section of the basin. Seas of 4 to 6 ft are elsewhere in the Caribbean Sea, except north of 18N and east of 85W where slightly lower seas of 3 to 5 ft are found. For the forecast, strong high pressure building southward from the western Atlantic will tighten the pressure gradient and increase winds over the basin, leading to strong winds over the south- central Caribbean through the weekend and into early next week. Fresh to strong northeast winds and building seas will prevail south of Cuba, in the Windward Passage, and south of Hispaniola starting tonight. ...ATLANTIC OCEAN... A cold front extends southwestward from low pressure of 1011 mb north of the area near 33N61W to 31N61W to 28N65W and to the eastern tip of Cuba. Fresh to strong south winds are east of the front to near 52W and north of 28N. Seas with these winds are in the range of 8 to 10 ft. Scattered moderate convection is evident within about 120 nm east of the front north of 24N. A trough is analyzed from near 19N53W to 12N53W. Isolated showers are possible near this trough. Mostly fresh northeast winds and seas of 8 to 10 ft are evident behind the cold front, except seas in the Bahamas are 5 to 7 ft. Winds elsewhere east of the front are moderate to fresh in speeds, and east to southeast in direction to near 40W along with seas of 7 to 9 ft in long-period east swell. East of 40W, east winds of fresh speeds are present also with seas of 7 to 9 ft in long- period northeast swell. For the forecast west of 55W, high pressure centered over the southeastern U.S. is building southward over the western Atlantic behind the above described cold front. The pressure gradient between the high pressure and the front will maintain mostly fresh northeast winds west of the front through Sun. Winds become locally strong starting Sun night as the high pressure strengthens some. The winds then diminish back to mostly fresh speeds starting Tue south of 28N as the high pressure weakens, with an associated ridge near 31N. Rough seas from large NE swell will linger into the start of next week between Bermuda and the Bahamas. $$ Aguirre ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXNT20KNHC111550_C_KWBC_20260411155106_38666572-995-TWDAT.txt ****0000004311**** AXNT20 KNHC 111550 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 1815 UTC Sat Apr 11 2026 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 1200 UTC surface analysis and satellite imagery through 1530 UTC. ...MONSOON TROUGH/ITCZ... The monsoon trough extends from 10N13W to 04N20W. The ITCZ continues from 04N20W to 02S45W. Scattered moderate isolated strong convection is from 00N to 08N between 13W and 20W. Scattered moderate convection is elsewhere within 120 nm of either side of the ITCZ. GULF OF AMERICA... High pressure anchored over the SE United States continues to impart surface ridging across the Gulf, providing for moderate or weaker E to SE winds and 3-6 ft seas. For the forecast, high pressure over the eastern U.S. will build southward toward the region. The related gradient will continue to maintain mostly moderate to fresh east winds across the basin through tonight. The high pressure will strengthen some through late Sun night as it shifts eastward over the western Atlantic through early next week before it weakens into midweek. A ridge will stretch west- southwestward from the high to across the northern Gulf through the period. A tightening pressure gradient between the ridge and lower pressure to its southeast associated with a frontal boundary will funnel pulsing fresh to strong east winds through the Straits of Florida and into the southeastern Gulf starting on Mon. Seas across the basin will be at a mostly moderate state, except reaching a rough state, at times, in the Straits of Florida beginning on Mon. CARIBBEAN SEA... The present synoptic weather pattern, with a cold front north of Hispaniola over the W Atlantic, and high pressures centered over the SE United States and in the north-central Atlantic, limits fresh to locally strong trades to the south-central Caribbean off the coast of Colombia, with 7-9 ft seas. Within the Windward Passage, fresh NE winds are analyzed as some of the post-frontal airmass drains through the passage. Moderate NE winds prevail elsewhere in the NW Caribbean, with 3-5 ft seas. In the remaining sections of the Eastern and Central Caribbean, trades are moderate or weaker with 4-7 ft seas. For the forecast, high pressure building southward from the western Atlantic will tighten the pressure gradient and increase winds over the basin, leading to strong winds over the south- central Caribbean through the weekend and into early next week. Fresh to strong northeast winds and building seas will prevail south of Cuba, in the Windward Passage, and south of Hispaniola starting tonight. Winds and seas will diminish late next week. ATLANTIC OCEAN... A cold front extends from 31N61W to the coast of Hispaniola near 20N70W. Moderate to locally fresh N winds, and 7-9 ft seas, prevail west of the frontal boundary across the W Atlantic. Scattered showers and tstorms are along the front. The tropical Atlantic is dominated by 1035 mb high pressure centered near the Azores. Moderate to fresh trades prevail north of 15N, with moderate or weaker trades south of 15N. 8-10 ft seas, in decaying long period NE swell, are analyzed from 05N to 25N between 20W and 60W. Elsewhere, seas are 4-7 ft in open waters. For the forecast west of 55W, high pressure is building behind the aforementioned cold front over the western Atlantic. The pressure gradient between these two features will maintain moderate to fresh northeast winds west of the front through Sun. Winds become locally strong starting Sun night as the high pressure strengthens some. The winds then diminish back to mostly fresh speeds starting Tue south of 28N as the high pressure weakens, with an associated ridge near 31N. Rough seas from large NE swell will linger into the start of next week between Bermuda and the Bahamas. $$ Mahoney ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXNT20KNHC112257_C_KWBC_20260411225814_9109880-997-TWDAT.txt ****0000004492**** AXNT20 KNHC 112257 TWDAT Tropical Weather Discussion NWS National Hurricane Center Miami FL 0015 UTC Sun Apr 12 2026 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 1800 UTC surface analysis and satellite imagery through 2245 UTC. ...SPECIAL FEATURE... Meteo-France has issued a Gale warning for the area of Agadir, which will begin on 12/15Z through 13/00Z. Sustained northerly gale-force winds are expected in the area, with higher gusts. For more details, refer to the Meteo-France High Seas Forecast product, listed on their website at https://wwmiws.wmo.int. ...MONSOON TROUGH/ITCZ... The monsoon trough extends from 09N14W to 04N20W. The ITCZ continues from 04N20W to 03S45W. Scattered moderate isolated strong convection is from 00N to 15N and E of 24W, and from S of 03N and W of 32W. GULF OF AMERICA... High pressure anchored over the SE United States continues to impart surface ridging across the Gulf, providing for moderate or weaker E to SE winds and moderate seas. For the forecast, high pressure over the eastern United States will maintain mostly moderate to fresh east winds across the basin through tonight. The high pressure will strengthen some through late Sun night as it shifts southward over the western Atlantic through early next week before it weakens into midweek. A ridge will stretch west- southwestward from the high to across the northern Gulf through the period. A tightening pressure gradient between the ridge and lower pressure to its southeast associated with a frontal boundary will funnel pulsing fresh to strong east winds through the Straits of Florida and into the southeastern Gulf starting on Mon. Seas across the basin will be at a mostly moderate state, except reaching a rough state, at times, in the Straits of Florida beginning on Mon. CARIBBEAN SEA... The present synoptic weather pattern, with a cold front north of Hispaniola over the W Atlantic, and high pressures centered over the SE United States and in the north-central Atlantic, limits fresh to strong trades to the south-central Caribbean off the coast of Colombia, with 7-9 ft seas. Within the Windward Passage, fresh NE winds are analyzed as some of the post-frontal airmass drains through the passage. Moderate NE winds prevail elsewhere in the NW Caribbean, with 3-5 ft seas. In the remaining sections of the Eastern and Central Caribbean, trades are moderate or weaker with 4-7 ft seas. For the forecast, high pressure over the western Atlantic will increase winds over the basin, leading to strong winds and rough seas to 10 ft over the south-central Caribbean through the weekend and into early next week. Fresh to strong northeast winds and building seas will prevail south of Cuba, in the Windward Passage, and south of Hispaniola starting tonight. Winds and seas will diminish late next week. ATLANTIC OCEAN... A cold front extends from 31N61W to the coast of Hispaniola near 20N70W. Moderate to locally fresh N winds, and 7-9 ft seas, prevail west of the frontal boundary across the W Atlantic. Scattered showers and tstorms are along the front. The tropical Atlantic is dominated by 1035 mb high pressure centered near the Azores. Moderate to fresh trades prevail north of 15N, with moderate or weaker trades south of 15N. 8-10 ft seas, in decaying long period NE swell, are analyzed from 05N to 25N between 20W and 60W. Elsewhere, seas are 4-7 ft in open waters. For the forecast west of 55W, high pressure is building behind the aforementioned cold front over the western Atlantic. The pressure gradient between these two features will maintain mostly fresh northeast winds west of the front through Sun. Winds become fresh to strong starting Sun night as the high pressure strengthens some. The winds then diminish back to mostly fresh speeds starting Tue south of 28N as the high pressure weakens, with an associated ridge near 31N. Rough seas from large NE swell will linger into the start of next week between Bermuda and the Bahamas. $$ ERA ########################### END OF MESSAGE SET ############################