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Tropical Storm Sam Public Advisory Number 4
2021-09-23 16:55:49| National Hurricane Center (Atlantic)
Issued at 1100 AM AST Thu Sep 23 2021 000 WTNT33 KNHC 231455 TCPAT3 BULLETIN Tropical Storm Sam Advisory Number 4 NWS National Hurricane Center Miami FL AL182021 1100 AM AST Thu Sep 23 2021 ...DEPRESSION STRENGTHENS INTO TROPICAL STORM SAM, THE 18TH NAMED STORM OF THE SEASON... ...NOW FORECAST TO BECOME A HURRICANE TOMORROW... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...10.9N 38.1W ABOUT 1745 MI...2805 KM ESE OF THE NORTHERN LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 16 MPH...26 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Tropical Storm Sam was located near latitude 10.9 North, longitude 38.1 West. Sam is moving toward the west near 16 mph (26 km/h) and this general motion is expected to continue over the next several days, but with a gradual slowdown in forward motion. Recent sallite wind data indicates maximum sustained winds have increased to near 50 mph (85 km/h) with higher gusts. Additional strengthening is forecast over the next several days, and Sam is now forecast to become a hurricane tomorrow and be near major hurricane intensity by the end of the weekend. Tropical-storm-force winds extend outward up to 45 miles (75 km) from the center. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Papin
Tropical Storm Sam Forecast Advisory Number 4
2021-09-23 16:54:48| National Hurricane Center (Atlantic)
Issued at 1500 UTC THU SEP 23 2021 245 WTNT23 KNHC 231454 TCMAT3 TROPICAL STORM SAM FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 1500 UTC THU SEP 23 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 10.9N 38.1W AT 23/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 14 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT....... 40NE 0SE 0SW 40NW. 12 FT SEAS.. 60NE 0SE 0SW 30NW. 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 10.9N 38.1W AT 23/1500Z AT 23/1200Z CENTER WAS LOCATED NEAR 10.8N 37.4W FORECAST VALID 24/0000Z 11.3N 40.3W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 30NE 0SE 0SW 0NW. 34 KT... 50NE 40SE 0SW 50NW. FORECAST VALID 24/1200Z 11.9N 42.9W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 0SE 0SW 20NW. 34 KT... 60NE 40SE 0SW 50NW. FORECAST VALID 25/0000Z 12.3N 45.0W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 20NE 0SE 0SW 0NW. 50 KT... 30NE 30SE 0SW 30NW. 34 KT... 70NE 40SE 30SW 50NW. FORECAST VALID 25/1200Z 12.7N 46.7W MAX WIND 80 KT...GUSTS 100 KT. 64 KT... 20NE 20SE 0SW 20NW. 50 KT... 30NE 30SE 20SW 30NW. 34 KT... 80NE 60SE 40SW 70NW. FORECAST VALID 26/0000Z 13.2N 48.2W MAX WIND 90 KT...GUSTS 110 KT. 50 KT... 40NE 30SE 20SW 30NW. 34 KT... 90NE 70SE 50SW 70NW. FORECAST VALID 26/1200Z 13.7N 49.4W MAX WIND 100 KT...GUSTS 120 KT. 50 KT... 50NE 40SE 40SW 50NW. 34 KT... 90NE 80SE 60SW 80NW. 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 27/1200Z 15.3N 52.1W MAX WIND 105 KT...GUSTS 130 KT. OUTLOOK VALID 28/1200Z 17.4N 55.2W MAX WIND 110 KT...GUSTS 135 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 10.9N 38.1W NEXT ADVISORY AT 23/2100Z $$ FORECASTER PAPIN
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Tropical Depression Eighteen Public Advisory Number 3
2021-09-23 10:34:16| National Hurricane Center (Atlantic)
Issued at 500 AM AST Thu Sep 23 2021 000 WTNT33 KNHC 230834 TCPAT3 BULLETIN Tropical Depression Eighteen Advisory Number 3 NWS National Hurricane Center Miami FL AL182021 500 AM AST Thu Sep 23 2021 ...TROPICAL DEPRESSION EXPECTED TO STRENGTHEN AS IT MOVES ACROSS THE TROPICAL CENTRAL ATLANTIC... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...10.5N 36.4W ABOUT 1860 MI...2995 KM ESE OF THE NORTHERN LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Tropical Depression Eighteen was located near latitude 10.5 North, longitude 36.4 West. The depression is moving toward the west near 15 mph (24 km/h) and this general motion is expected to continue through Friday. A slower motion toward the west-northwest is expected Friday night and continuing into the weekend. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Strengthening is forecast during the next few days, and the depression could become a tropical storm later today. It is then forecast to become a hurricane over the weekend. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi
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Tropical Depression Eighteen Forecast Advisory Number 3
2021-09-23 10:33:47| National Hurricane Center (Atlantic)
Issued at 0900 UTC THU SEP 23 2021 000 WTNT23 KNHC 230833 TCMAT3 TROPICAL DEPRESSION EIGHTEEN FORECAST/ADVISORY NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 0900 UTC THU SEP 23 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 10.5N 36.4W AT 23/0900Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 10.5N 36.4W AT 23/0900Z AT 23/0600Z CENTER WAS LOCATED NEAR 10.4N 35.7W FORECAST VALID 23/1800Z 10.8N 38.4W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 50NE 0SE 0SW 40NW. FORECAST VALID 24/0600Z 11.3N 40.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 70NE 0SE 0SW 50NW. FORECAST VALID 24/1800Z 11.9N 43.3W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 0NW. 34 KT... 80NE 40SE 0SW 50NW. FORECAST VALID 25/0600Z 12.5N 45.2W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 20NE 20SE 0SW 20NW. 34 KT... 80NE 50SE 20SW 40NW. FORECAST VALID 25/1800Z 13.0N 46.9W MAX WIND 70 KT...GUSTS 85 KT. 50 KT... 30NE 20SE 10SW 20NW. 34 KT... 80NE 60SE 30SW 50NW. FORECAST VALID 26/0600Z 13.7N 48.3W MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 40NE 30SE 20SW 30NW. 34 KT... 90NE 80SE 40SW 60NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 27/0600Z 15.0N 50.8W MAX WIND 90 KT...GUSTS 110 KT. OUTLOOK VALID 28/0600Z 16.9N 53.9W MAX WIND 100 KT...GUSTS 120 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 10.5N 36.4W NEXT ADVISORY AT 23/1500Z $$ FORECASTER CANGIALOSI
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Post-Tropical Cyclone Rose Public Advisory Number 17
2021-09-23 10:32:17| National Hurricane Center (Atlantic)
Issued at 900 AM GMT Thu Sep 23 2021 000 WTNT32 KNHC 230832 TCPAT2 BULLETIN Post-Tropical Cyclone Rose Advisory Number 17 NWS National Hurricane Center Miami FL AL172021 900 AM GMT Thu Sep 23 2021 ...ROSE IS NOW A REMNANT LOW... ...THIS IS THE LAST NHC ADVISORY... SUMMARY OF 900 AM GMT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...25.2N 41.6W ABOUT 1300 MI...2095 KM WNW OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...NW OR 310 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...1010 MB...29.83 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 AM GMT (0900 UTC), the center of Post-Tropical Cyclone Rose was located near latitude 25.2 North, longitude 41.6 West. The post-tropical cyclone is moving toward the northwest near 10 mph (17 km/h). A turn to the north is expected by tonight, followed by a northeast or east motion on Friday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Rose is expected to dissipate in a couple of days. The estimated minimum central pressure is 1010 mb (29.83 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on Rose. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php $$ Forecaster Cangialosi
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