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Atlantic Tropical Weather Outlook

2021-09-17 19:45:23| National Hurricane Center (Atlantic)

000 ABNT20 KNHC 171740 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 PM EDT Fri Sep 17 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The Weather Prediction Center is issuing advisories on Post-Tropical Cyclone Nicholas, located over Louisiana. Recent satellite images indicate that a new and better-defined center of circulation has developed in association with a low pressure area located about 250 miles east of Norfolk, Virginia. In addition, shower and thunderstorm activity is becoming more organized near this new center. If these development trends continue, then a tropical depression or tropical storm is likely to form later today or tonight while the low moves toward the northeast or east-northeast at 10 to 15 mph, away from the United States Mid-Atlantic and Northeast coasts. The low is expected to transform into a non-tropical gale-force low Saturday or Saturday night while it is located south of Atlantic Canada, and it is likely to bring strong winds and heavy rains to portions of Newfoundland by Sunday and Sunday night. This system is also expected to bring high surf to portions of the Mid-Atlantic and Northeast U.S. coasts and Atlantic Canada through this weekend. Additional information on this system, including gale warnings, can be found in High Seas Forecasts issued by the NOAA Ocean Prediction Center. * Formation chance through 48 hours...high...80 percent. * Formation chance through 5 days...high...80 percent. Showers and thunderstorms associated with a tropical wave and broad area of low pressure located about midway between the Lesser Antilles and the Cabo Verde Islands have become a little better organized since yesterday. Environmental conditions are expected to be conducive for further development during the next couple of days, and a tropical depression is likely to form over the weekend or early next week while moving toward the west-northwest at about 15 mph across the central tropical Atlantic and then near the northern Leeward Islands by Monday and Tuesday. Upper-level winds could become less conducive for development over the southwestern Atlantic by the early to middle part of next week. Interests in the Leeward Islands should monitor the progress of this system during the next few days. * Formation chance through 48 hours...high...70 percent. * Formation chance through 5 days...high...80 percent. A broad area of low pressure located a few hundred miles south-southeast of the Cabo Verde Islands continues to produce disorganized showers and thunderstorms. This system is expected to move toward the west and then northwest at 5 to 10 mph over the far eastern Atlantic, and some gradual development is possible over the weekend before upper-level winds increase and the low moves over cooler waters. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...low...30 percent. && Public advisories issued by the Weather Prediction Center on Post-Tropical Cyclone Nicholas can be found under AWIPS header TCPAT4, WMO header WTNT34 KWNH, and on the web at https://www.wpc.ncep.noaa.gov or hurricanes.gov High Seas Forecasts for the system off the United States Mid-Atlantic coast issued by the NOAA Ocean Prediction Center can be found under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php $$ Forecaster Berg

Tags: weather atlantic outlook tropical

 

Eastern North Pacific Tropical Weather Outlook

2021-09-17 19:12:05| National Hurricane Center (East Pacific)

639 ABPZ20 KNHC 171711 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 1100 AM PDT Fri Sep 17 2021 For the eastern North Pacific...east of 140 degrees west longitude: Tropical cyclone formation is not expected during the next 5 days. $$ Forecaster Brown

Tags: north weather pacific eastern

 
 

Atlantic Tropical Weather Outlook

2021-09-17 13:52:24| National Hurricane Center (Atlantic)

000 ABNT20 KNHC 171152 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 AM EDT Fri Sep 17 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The Weather Prediction Center is issuing advisories on Post-Tropical Cyclone Nicholas, located over Louisiana. Showers and thunderstorms remain disorganized in association with a tropical wave and broad area of low pressure located about midway between the Lesser Antilles and the Cabo Verde Islands. However, environmental conditions are expected to be conducive for development during the next few days, and a tropical depression is still likely to form over the weekend or early next week while moving toward the west-northwest at 15 to 20 mph across the central tropical Atlantic and then near or north of the Leeward Islands by Monday and Tuesday. Interests in the Leeward Islands should monitor the progress of this system during the next few days. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...high...70 percent. The circulation associated with an area of low pressure located about 150 miles east of Cape Hatteras, North Carolina, remains broad and elongated, and most of the associated shower and thunderstorm activity is displaced well to the north and east of the center. However, this system is still likely to become a short-lived tropical depression or tropical storm before it makes a transition to a non-tropical gale-force low by Saturday or Saturday night while moving northeastward at about 15 mph away from the United States mid-Atlantic and Northeast coasts. Regardless of development, this system could bring high surf to portions of the mid-Atlantic and Northeast U.S. coasts and Atlantic Canada through this weekend. Additional information on this system, including gale warnings, can be found in High Seas Forecasts issued by the NOAA Ocean Prediction Center. * Formation chance through 48 hours...high...70 percent. * Formation chance through 5 days...high...70 percent. Disorganized cloudiness and thunderstorms over the far eastern tropical Atlantic are associated with a tropical wave located a couple of hundred miles southeast of the Cabo Verde Islands. Environmental conditions are forecast to be only marginally conducive, and development, if any, of this system should be slow to occur over the next few days while the system moves toward the west-northwest or northwest at 5 to 10 mph over the far eastern Atlantic. * Formation chance through 48 hours...low...10 percent. * Formation chance through 5 days...low...20 percent. && Public advisories issued by the Weather Prediction Center on Post-Tropical Cyclone Nicholas can be found under AWIPS header TCPAT4, WMO header WTNT34 KWNH, and on the web at https://www.wpc.ncep.noaa.gov or hurricanes.gov High Seas Forecasts for the system off the Outer Banks of North Carolina issued by the NOAA Ocean Prediction Center can be found under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php $$ Forecaster Berg

Tags: weather atlantic outlook tropical

 

Eastern North Pacific Tropical Weather Outlook

2021-09-17 13:15:55| National Hurricane Center (East Pacific)

000 ABPZ20 KNHC 171115 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 500 AM PDT Fri Sep 17 2021 For the eastern North Pacific...east of 140 degrees west longitude: Tropical cyclone formation is not expected during the next 5 days. $$ Forecaster Brown

Tags: north weather pacific eastern

 

Atlantic Tropical Weather Outlook

2021-09-17 07:43:46| National Hurricane Center (Atlantic)

000 ABNT20 KNHC 170543 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 AM EDT Fri Sep 17 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The Weather Prediction Center is issuing advisories on Post-Tropical Cyclone Nicholas, located over Louisiana. Showers and thunderstorms remain disorganized in association with a tropical wave and broad area of low pressure located about 1100 miles west-southwest of the Cabo Verde Islands. However, environmental conditions are expected to be conducive for development during the next few days, and a tropical depression could still form over the weekend. This system is expected to move westward to west-northwestward at 15 to 20 mph across the tropical Atlantic during the next several days. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...high...70 percent. A broad area of low pressure is located about 100 miles southeast of the Outer Banks of North Carolina. Although the circulation of this system has become a little better defined since yesterday, the associated showers and thunderstorms remain disorganized and located mainly well to the east of the center. Environmental conditions are becoming more conducive for development, and a tropical depression is likely to form during the next day or so while the system moves northward to north-northeastward off the southeast and mid-Atlantic U.S. coasts. Regardless of development, this system could bring high surf to portions of the southeast and mid-Atlantic U.S. coasts through this weekend. Additional information on this system, including gale warnings, can be found in High Seas Forecasts issued by the NOAA Ocean Prediction Center. * Formation chance through 48 hours...high...70 percent. * Formation chance through 5 days...high...70 percent. Disorganized cloudiness and thunderstorms over the far eastern tropical Atlantic are associated with a tropical wave located a few hundred miles southeast of the Cabo Verde Islands. Environmental conditions are forecast to be only marginally conducive, and development, if any, of this system should be slow to occur over the next few days while the system moves west-northwestward to northwestward over the far eastern Atlantic. * Formation chance through 48 hours...low...10 percent. * Formation chance through 5 days...low...20 percent. && Public advisories issued by the Weather Prediction Center on Post-Tropical Cyclone Nicholas can be found under AWIPS header TCPAT4, WMO header WTNT34 KWNH, and on the web at https://www.wpc.ncep.noaa.gov or hurricanes.gov High Seas Forecasts for the system off the Outer Banks of North Carolina issued by the NOAA Ocean Prediction Center can be found under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php $$ Forecaster Pasch

Tags: weather atlantic outlook tropical

 

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