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Tropical Storm Nicholas Forecast Advisory Number 1

2021-09-12 16:57:33| National Hurricane Center (Atlantic)

Issued at 1500 UTC SUN SEP 12 2021 690 WTNT24 KNHC 121457 TCMAT4 TROPICAL STORM NICHOLAS FORECAST/ADVISORY NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142021 1500 UTC SUN SEP 12 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A TROPICAL STORM WARNING IS IN EFFECT FOR THE COAST OF TEXAS FROM THE MOUTH OF THE RIO GRANDE TO PORT ARANSAS. THE GOVERNMENT OF MEXICO HAS ISSUED A TROPICAL STORM WARNING FROM BARRA EL MEZQUITAL NORTHWARD TO THE U.S./MEXICO BORDER. A STORM SURGE WATCH IS IN EFFECT FOR THE COAST OF TEXAS FROM THE MOUTH OF THE RIO GRANDE TO HIGH ISLAND. A TROPICAL STORM WATCH IS IN EFFECT FOR THE COAST OF TEXAS FROM NORTH OF PORT ARANSAS TO HIGH ISLAND. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * MOUTH OF THE RIO GRANDE TO PORT ARANSAS TEXAS * BARRA EL MEZQUITAL TO THE U.S./MEXICO BORDER A STORM SURGE WATCH IS IN EFFECT FOR... * MOUTH OF THE RIO GRANDE TO HIGH ISLAND TEXAS A TROPICAL STORM WATCH IS IN EFFECT FOR... * NORTH OF PORT ARANSAS TO HIGH ISLAND TEXAS A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS. A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE-THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...IN THE INDICATED LOCATIONS DURING THE NEXT 48 HOURS. FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT HURRICANES.GOV. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE ALONG THE UPPER TEXAS COAST SHOULD MONITOR THE PROGRESS OF THIS SYSTEM. TROPICAL STORM CENTER LOCATED NEAR 20.5N 94.8W AT 12/1500Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 330 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 90NE 0SE 0SW 0NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 20.5N 94.8W AT 12/1500Z AT 12/1200Z CENTER WAS LOCATED NEAR 19.9N 94.4W FORECAST VALID 13/0000Z 21.9N 95.7W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 80NE 30SE 0SW 0NW. FORECAST VALID 13/1200Z 24.1N 96.6W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 70NE 40SE 0SW 0NW. FORECAST VALID 14/0000Z 26.4N 96.9W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 30NE 20SE 0SW 0NW. 34 KT... 70NE 50SE 20SW 30NW. FORECAST VALID 14/1200Z 28.2N 96.5W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 30NE 30SE 0SW 0NW. 34 KT... 70NE 60SE 30SW 30NW. FORECAST VALID 15/0000Z 29.4N 95.9W...INLAND MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 50NE 60SE 0SW 0NW. FORECAST VALID 15/1200Z 30.3N 95.2W...INLAND MAX WIND 30 KT...GUSTS 40 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 16/1200Z 31.0N 94.8W...INLAND MAX WIND 25 KT...GUSTS 35 KT. OUTLOOK VALID 17/1200Z 32.0N 94.5W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.5N 94.8W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 12/1800Z NEXT ADVISORY AT 12/2100Z $$ FORECASTER BROWN

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Atlantic Tropical Weather Outlook

2021-09-12 13:42:28| National Hurricane Center (Atlantic)

415 ABNT20 KNHC 121142 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 AM EDT Sun Sep 12 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: Showers and thunderstorms associated with a broad area of low pressure over the southwestern Bay of Campeche have increased overnight and are showing signs of organization. Environmental conditions are conducive for additional development, and a tropical depression is expected to form later today or tonight while the system moves northwestward and then northward near the coast of northeastern Mexico. Additional development is possible through the middle of next week if the system remains over water, and interests along the western and northwestern Gulf coast should monitor the progress of this disturbance as watches may be required for portions of the coasts of northeastern Mexico and Texas later this morning or this afternoon. An Air Force Hurricane Hunter aircraft is currently en route to investigate the system this morning. Regardless of development, the disturbance will continue to produce heavy rain across portions of southern Mexico today, which may lead to flash flooding and mudslides. By late today, heavy rain is expected to reach portions of the Texas and Louisiana coasts, with a heavy rain threat continuing across those coastal areas through the middle of the week. Localized significant rainfall amounts are possible, potentially resulting in areas of flash, urban, and isolated river flooding. * Formation chance through 48 hours...high...90 percent. * Formation chance through 5 days...high...90 percent. Disorganized showers and a few thunderstorms continue in association with a tropical wave located near the Cabo Verde Islands. Environmental conditions are becoming less conducive for development, and the chances of tropical depression formation are decreasing while the system moves westward over the far eastern tropical Atlantic. By the middle of the week, stronger upper-level winds and marginally warm ocean temperatures are expected to limit additional development. This disturbance could bring locally heavy rain across the Cabo Verde Islands today. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...low...20 percent. A non-tropical area of low pressure is located over the far northeastern Atlantic a few hundred miles east-northeast of the Azores. This system is forecast to move south-southeastward towards warmer waters, which could allow the low to gradually acquire some tropical or subtropical characteristics during the next couple of days. After that time, the system is forecast to move inland over Portugal ending any further development chance. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...low...20 percent. Another tropical wave is forecast to move off the west coast of Africa in a couple of days. Gradual development of this system is possible thereafter, and a tropical depression could form by the middle of the week while it moves westward across the eastern tropical Atlantic Ocean. * Formation chance through 48 hours...low...10 percent. * Formation chance through 5 days...medium...60 percent. An area of low pressure is expected to form north of the southeastern or central Bahamas in a few days resulting from a tropical wave interacting with an upper-level trough. Gradual development of this system is possible, and a tropical depression could form later this week several hundred miles southeast of the Carolinas while it moves northwestward across the western Atlantic. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...medium...50 percent. $$ Forecaster Brown

Tags: weather atlantic outlook tropical

 
 

Eastern North Pacific Tropical Weather Outlook

2021-09-12 13:30:34| National Hurricane Center (East Pacific)

000 ABPZ20 KNHC 121130 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 500 AM PDT Sun Sep 12 2021 For the eastern North Pacific...east of 140 degrees west longitude: An area of low pressure located near the southeastern coast of Mexico just east of Puerto Angel is producing limited shower and thunderstorm activity. Further development of this system is becoming less likely now that the low is interacting with land. However, a tropical depression could still form if the system moves westward away from the coast of Mexico during the next day or two. Regardless of development, this system will likely produce heavy rains across portions of southern Mexico through Tuesday. * Formation chance through 48 hours...medium...40 percent. * Formation chance through 5 days...medium...40 percent. $$ Forecaster Stewart

Tags: north weather pacific eastern

 

Atlantic Tropical Weather Outlook

2021-09-12 07:29:51| National Hurricane Center (Atlantic)

000 ABNT20 KNHC 120529 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 AM EDT Sun Sep 12 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: Showers and thunderstorms over the Bay of Campeche and southern Gulf of Mexico have been increasing during the past several hours near and east of a surface trough of low pressure. A tropical depression is expected to form later today or tonight while the system moves northwestward and then northward near the coast of northeastern Mexico. Additional development is possible through the middle of next week if the system remains over water, and interests along the western and northwestern Gulf coast should monitor the progress of this disturbance. An Air Force Hurricane Hunter aircraft is scheduled to investigate the system this morning, and potential tropical cyclone advisories could be initiated later today. Regardless of development, the disturbance will continue to produce heavy rain across portions of southern Mexico today, including the western Yucatan Peninsula, which may lead to flash flooding and mudslides. By late today, heavy rain is expected to reach portions of the Texas and Louisiana coasts with a heavy rain threat continuing across those coasts through the middle of the week. Localized significant rainfall amounts are possible, potentially resulting in areas of flash, urban, and isolated river flooding. * Formation chance through 48 hours...high...90 percent. * Formation chance through 5 days...high...90 percent. Disorganized showers and a few thunderstorms continue in association with a tropical wave located near the Cabo Verde Islands. Environmental conditions are becoming less conducive for development, and the chances of tropical depression formation are decreasing while the system moves westward over the far eastern Atlantic. By the middle of the week, stronger upper-level winds and marginally warm ocean temperatures are expected to limit additional development. This disturbance could bring locally heavy rain across the Cabo Verde Islands today. * Formation chance through 48 hours...low...30 percent. * Formation chance through 5 days...low...30 percent. A non-tropical area of low pressure is located over the far northeastern Atlantic several hundred miles northeast of the Azores. This system is forecast to move south-southeastward towards warmer waters, which could allow the low to gradually acquire some tropical or subtropical characteristics by the middle of next week. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...low...20 percent. Another tropical wave is forecast to move off the west coast of Africa in a couple of days. Gradual development of this system is possible thereafter, and a tropical depression could form by the middle of the week while it moves westward across the eastern tropical Atlantic Ocean. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...medium...60 percent. An area of low pressure is expected to form north of the southeastern Bahamas in a few days resulting from the northern end of a tropical wave interacting with an upper-level trough. Gradual development of this system is possible, and a tropical depression could form by the middle of the week several hundred miles southeast of the Carolinas while it moves northwestward across the western Atlantic. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...medium...40 percent. $$ Forecaster Blake

Tags: weather atlantic outlook tropical

 

Eastern North Pacific Tropical Weather Outlook

2021-09-12 07:17:23| National Hurricane Center (East Pacific)

000 ABPZ20 KNHC 120517 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 1100 PM PDT Sat Sep 11 2021 For the eastern North Pacific...east of 140 degrees west longitude: An area of low pressure over the Gulf of Tehuantepec continues to produce a large area of disorganized showers and thunderstorms. Further development of this system is possible during the next couple of days as long as it remains over water, and a tropical depression could form tomorrow or early Monday while the system moves northwestward toward the southern and southwestern coasts of Mexico. Further development is not expected by midweek due to interaction with land. Regardless of development, this system will likely produce heavy rains across portions of southern Mexico during the next couple of days. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...medium...60 percent. $$ Forecaster Blake

Tags: north weather pacific eastern

 

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