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Hurricane Sam Public Advisory Number 31
2021-09-30 10:53:56| National Hurricane Center (Atlantic)
Issued at 500 AM AST Thu Sep 30 2021 000 WTNT33 KNHC 300853 TCPAT3 BULLETIN Hurricane Sam Advisory Number 31 NWS National Hurricane Center Miami FL AL182021 500 AM AST Thu Sep 30 2021 ...POWERFUL HURRICANE SAM CONTINUES NORTHWESTWARD... ...TROPICAL STORM WATCH ISSUED FOR BERMUDA... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...21.5N 59.1W ABOUT 345 MI...555 KM NE OF THE NORTHERN LEEWARD ISLANDS ABOUT 825 MI...1325 KM SSE OF BERMUDA MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...937 MB...27.67 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Bermuda Weather Service has issued a Tropical Storm Watch for Bermuda. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * Bermuda A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the eye of Hurricane Sam was located near latitude 21.5 North, longitude 59.1 West. Sam is moving toward the northwest near 12 mph (19 km/h), and this general motion with an increase in forward speed is expected through tonight. A turn toward the north is anticipated by late Friday, and a northeastward motion is forecast to begin on Saturday. On the forecast track, the core of Sam will continue to pass well to the northeast of the northern Leeward Islands this morning, and pass to the east of Bermuda early Saturday. Data from an Air Force Reserve Hurricane Hunter aircraft indicate that the maximum sustained winds are near 145 mph (230 km/h) with higher gusts. Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some fluctuations in intensity are expected during the next couple of days, but Sam is forecast to remain a major hurricane through Saturday, with more significant weakening anticipated later in the weekend. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). NOAA buoy 41044 has recently measured a peak one-minute sustained wind of 78 mph (126 km/h) and a gust to 98 mph (158 km/h). The latest minimum central pressure estimated from Air Force Reserve reconnaissance data is 937 mb (27.67 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the web at hurricanes.gov/graphics_at3.shtml?key_messages. WIND: Tropical storm conditions are possible on Bermuda beginning Friday night or early Saturday. SURF: Swells generated by Sam will impact the Northern Leeward Islands and the Greater Antilles, including Puerto Rico, during the next few days. Swells are expected to reach Bermuda and the Bahamas by Friday, and then spread to the United States east coast by this weekend. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Brown
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Hurricane Sam Forecast Advisory Number 31
2021-09-30 10:53:56| National Hurricane Center (Atlantic)
Issued at 0900 UTC THU SEP 30 2021 000 WTNT23 KNHC 300853 TCMAT3 HURRICANE SAM FORECAST/ADVISORY NUMBER 31 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 0900 UTC THU SEP 30 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE BERMUDA WEATHER SERVICE HAS ISSUED A TROPICAL STORM WATCH FOR BERMUDA. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * BERMUDA A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. HURRICANE CENTER LOCATED NEAR 21.5N 59.1W AT 30/0900Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 10 KT ESTIMATED MINIMUM CENTRAL PRESSURE 937 MB MAX SUSTAINED WINDS 125 KT WITH GUSTS TO 150 KT. 64 KT....... 50NE 40SE 35SW 40NW. 50 KT....... 80NE 70SE 50SW 60NW. 34 KT.......130NE 120SE 90SW 110NW. 12 FT SEAS..180NE 150SE 150SW 150NW. 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 21.5N 59.1W AT 30/0900Z AT 30/0600Z CENTER WAS LOCATED NEAR 21.0N 58.8W FORECAST VALID 30/1800Z 23.0N 60.2W MAX WIND 130 KT...GUSTS 160 KT. 64 KT... 50NE 45SE 35SW 45NW. 50 KT... 90NE 70SE 60SW 70NW. 34 KT...130NE 120SE 90SW 110NW. FORECAST VALID 01/0600Z 25.6N 61.4W MAX WIND 125 KT...GUSTS 150 KT. 64 KT... 50NE 45SE 35SW 45NW. 50 KT... 90NE 70SE 60SW 70NW. 34 KT...130NE 130SE 90SW 110NW. FORECAST VALID 01/1800Z 28.4N 61.8W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 50NE 45SE 40SW 45NW. 50 KT... 80NE 70SE 60SW 70NW. 34 KT...140NE 140SE 100SW 110NW. FORECAST VALID 02/0600Z 31.1N 61.3W MAX WIND 115 KT...GUSTS 140 KT. 64 KT... 50NE 50SE 40SW 40NW. 50 KT... 80NE 80SE 60SW 70NW. 34 KT...150NE 150SE 120SW 120NW. FORECAST VALID 02/1800Z 33.5N 59.9W MAX WIND 105 KT...GUSTS 130 KT. 50 KT... 80NE 80SE 60SW 70NW. 34 KT...160NE 180SE 130SW 150NW. FORECAST VALID 03/0600Z 35.5N 58.0W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 80NE 80SE 70SW 80NW. 34 KT...160NE 180SE 140SW 160NW. 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 04/0600Z 38.7N 52.6W MAX WIND 80 KT...GUSTS 100 KT. OUTLOOK VALID 05/0600Z 44.3N 45.0W...POST-TROP/EXTRATROP MAX WIND 65 KT...GUSTS 80 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.5N 59.1W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 30/1200Z NEXT ADVISORY AT 30/1500Z $$ FORECASTER BROWN
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Tropical Storm Victor Public Advisory Number 4
2021-09-30 10:42:37| National Hurricane Center (Atlantic)
Issued at 800 AM CVT Thu Sep 30 2021 000 WTNT35 KNHC 300842 TCPAT5 BULLETIN Tropical Storm Victor Advisory Number 4 NWS National Hurricane Center Miami FL AL202021 800 AM CVT Thu Sep 30 2021 ...VICTOR A LITTLE STRONGER... SUMMARY OF 800 AM CVT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...8.7N 27.3W ABOUT 550 MI...885 KM SSW OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 800 AM CVT (0900 UTC), the center of Tropical Storm Victor was located near latitude 8.7 North, longitude 27.3 West. Victor is moving toward the west-northwest near 13 mph (20 km/h). A west-northwest to northwest motion over the eastern tropical Atlantic is expected through the weekend. Maximum sustained winds have increased to near 45 mph (75 km/h) with higher gusts. Additional strengthening is forecast, and Victor could become a hurricane on Friday. A weakening trend is expected to begin over the weekend. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- None NEXT ADVISORY ------------- Next complete advisory at 200 PM CVT. $$ Forecaster Berg
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Tropical Storm Victor Forecast Advisory Number 4
2021-09-30 10:42:37| National Hurricane Center (Atlantic)
Issued at 0900 UTC THU SEP 30 2021 000 WTNT25 KNHC 300842 TCMAT5 TROPICAL STORM VICTOR FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL202021 0900 UTC THU SEP 30 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 8.7N 27.3W AT 30/0900Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1004 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 50NE 0SE 0SW 40NW. 12 FT SEAS..150NE 105SE 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 8.7N 27.3W AT 30/0900Z AT 30/0600Z CENTER WAS LOCATED NEAR 8.5N 26.8W FORECAST VALID 30/1800Z 9.4N 28.8W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 30NE 0SE 0SW 0NW. 34 KT... 90NE 50SE 30SW 60NW. FORECAST VALID 01/0600Z 10.2N 30.6W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 20SE 0SW 30NW. 34 KT...100NE 60SE 40SW 70NW. FORECAST VALID 01/1800Z 11.2N 32.3W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 0SE 0SW 0NW. 50 KT... 30NE 20SE 10SW 30NW. 34 KT...100NE 70SE 40SW 80NW. FORECAST VALID 02/0600Z 12.6N 33.8W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 10SE 0SW 0NW. 50 KT... 30NE 30SE 20SW 20NW. 34 KT... 90NE 70SE 40SW 70NW. FORECAST VALID 02/1800Z 14.4N 35.3W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 20SE 20SW 20NW. 34 KT... 80NE 70SE 30SW 60NW. FORECAST VALID 03/0600Z 16.6N 37.0W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 30NE 20SE 0SW 20NW. 34 KT... 70NE 70SE 30SW 50NW. 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 04/0600Z 22.0N 40.2W MAX WIND 40 KT...GUSTS 50 KT. OUTLOOK VALID 05/0600Z 27.3N 41.9W MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 8.7N 27.3W NEXT ADVISORY AT 30/1500Z $$ FORECASTER BERG
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Hurricane Sam Public Advisory Number 30
2021-09-30 04:52:50| National Hurricane Center (Atlantic)
Issued at 1100 PM AST Wed Sep 29 2021 760 WTNT33 KNHC 300252 TCPAT3 BULLETIN Hurricane Sam Advisory Number 30 NWS National Hurricane Center Miami FL AL182021 1100 PM AST Wed Sep 29 2021 ...SAM GAINING STRENGTH AND SIZE OVER THE WESTERN ATLANTIC... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...20.6N 58.4W ABOUT 350 MI...560 KM ENE OF THE NORTHERN LEEWARD ISLANDS ABOUT 900 MI...1445 KM SSE OF BERMUDA MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H PRESENT MOVEMENT...NW OR 315 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...940 MB...27.76 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. Interests in Bermuda should monitor the progress of Sam. A Tropical Storm Watch could be required for the island on Thursday. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Hurricane Sam was located near latitude 20.6 North, longitude 58.4 West. Sam is moving toward the northwest near 12 mph (19 km/h), and this general motion with an increase in forward speed is expected during the next couple of days. A turn toward the north and northeast is anticipated by Friday night. On the forecast track, Sam will continue to pass well to the east-northeast of the northern Leeward Islands through tonight, and pass to the east of Bermuda early Saturday. Data from a NOAA Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 145 mph (230 km/h) with higher gusts. Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some fluctuations in intensity are expected during the next couple of days, but Sam is forecast to remain a major hurricane through late this week, with more significant weakening anticipated over the weekend. Hurricane-force winds extend outward up to 65 miles (100 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). The estimated minimum central pressure based on NOAA Hurricane Hunter data is 940 mb (27.76 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC. SURF: Swells generated by Sam will impact the Lesser Antilles during the next several days. Swells are expected to reach Bermuda and the Bahamas in a day or so, and then spread to the United States east coast by this weekend. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Blake
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