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Tropical Storm Victor Forecast Discussion Number 10
2021-10-01 22:43:32| National Hurricane Center (Atlantic)
Issued at 500 PM AST Fri Oct 01 2021 000 WTNT45 KNHC 012043 TCDAT5 Tropical Storm Victor Discussion Number 10 NWS National Hurricane Center Miami FL AL202021 500 PM AST Fri Oct 01 2021 Victor is looking disorganized. Deep convection has decreased in organization and coverage this afternoon. No recent microwave imagery has been available to assess the structure of the storm, but visible images from MET-11 and GOES-17 suggest that the circulation of the tropical storm is still elongated southwest-to-northeast. The intensity estimate remains 55 kt for this advisory, but this is on the high end of the recent estimates and could be generous. Compared to the large changes made this morning, almost no change was made to the official track forecast this afternoon. The model consensus has shifted substantially back to the right, and now lies very near the previous NHC forecast. Victor is forecast to turn northwestward tomorrow, and then continue on that heading through early next week, steered by ridging to the northeast. The new NHC forecast is very near the model consensus through the end of the forecast. Despite the recent agreement between the NHC forecast and the consensus, confidence in the forecast will remain low until we see better run-to-run consistency in the track model guidance. Shear and dry air may already be taking a toll on Victor, and SHIPS diagnostics from the GFS and ECMWF suggest that the environment will get worse with time. All of the intensity models forecast that Victor will weaken over the next several days in response to the hostile environment, and this is reflected in the NHC forecast, which is heavily based on the IVCN multi-model consensus. By day 5, all of the dynamical models indicate that Victor will likely degenerate into a trough of low pressure, so dissipation is shown. Several models, including the HWRF, GFS, and ECMWF indicate dissipation could occur sooner than that. FORECAST POSITIONS AND MAX WINDS INIT 01/2100Z 12.0N 34.3W 55 KT 65 MPH 12H 02/0600Z 12.7N 35.5W 50 KT 60 MPH 24H 02/1800Z 13.9N 37.2W 45 KT 50 MPH 36H 03/0600Z 15.6N 39.0W 45 KT 50 MPH 48H 03/1800Z 17.6N 40.9W 40 KT 45 MPH 60H 04/0600Z 19.7N 42.9W 40 KT 45 MPH 72H 04/1800Z 21.5N 44.5W 35 KT 40 MPH 96H 05/1800Z 24.5N 47.5W 30 KT 35 MPH...POST-TROP/REMNT LOW 120H 06/1800Z...DISSIPATED $$ Forecaster D. Zelinsky
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Tropical Storm Victor Wind Speed Probabilities Number 10
2021-10-01 22:41:57| National Hurricane Center (Atlantic)
Issued at 2100 UTC FRI OCT 01 2021 000 FONT15 KNHC 012041 PWSAT5 TROPICAL STORM VICTOR WIND SPEED PROBABILITIES NUMBER 10 NWS NATIONAL HURRICANE CENTER MIAMI FL AL202021 2100 UTC FRI OCT 01 2021 AT 2100Z THE CENTER OF TROPICAL STORM VICTOR WAS LOCATED NEAR LATITUDE 12.0 NORTH...LONGITUDE 34.3 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 55 KTS...65 MPH...100 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 18Z FRI AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 18Z FRI 06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE PERIODS TO TO TO TO TO TO TO 06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE 18Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER D. ZELINSKY
Summary for Tropical Storm Victor (AT5/AL202021)
2021-10-01 22:41:36| National Hurricane Center (Atlantic)
...VICTOR LOSING ORGANIZATION OVER THE EASTERN TROPICAL ATLANTIC... As of 5:00 PM AST Fri Oct 1 the center of Victor was located near 12.0, -34.3 with movement WNW at 13 mph. The minimum central pressure was 997 mb with maximum sustained winds of about 65 mph.
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Tropical Storm Victor Public Advisory Number 10
2021-10-01 22:41:36| National Hurricane Center (Atlantic)
Issued at 500 PM AST Fri Oct 01 2021 000 WTNT35 KNHC 012041 TCPAT5 BULLETIN Tropical Storm Victor Advisory Number 10 NWS National Hurricane Center Miami FL AL202021 500 PM AST Fri Oct 01 2021 ...VICTOR LOSING ORGANIZATION OVER THE EASTERN TROPICAL ATLANTIC... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...12.0N 34.3W ABOUT 745 MI...1195 KM WSW OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...WNW OR 295 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 PM AST (2100 UTC), the center of Tropical Storm Victor was located near latitude 12.0 North, longitude 34.3 West. Victor is moving toward the west-northwest near 13 mph (20 km/h). The forward speed of the tropical storm has slowed and a turn to the northwest is anticipated by tomorrow. Victor is then expected to move northwestward over the weekend and into early next week with slight fluctuations in forward speed. Maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Victor is expected to gradually weaken over the next 72 hours. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure is 997 mb (29.44 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster D. Zelinsky
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Tropical Storm Victor Forecast Advisory Number 10
2021-10-01 22:40:01| National Hurricane Center (Atlantic)
Issued at 2100 UTC FRI OCT 01 2021 000 WTNT25 KNHC 012039 TCMAT5 TROPICAL STORM VICTOR FORECAST/ADVISORY NUMBER 10 NWS NATIONAL HURRICANE CENTER MIAMI FL AL202021 2100 UTC FRI OCT 01 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 12.0N 34.3W AT 01/2100Z POSITION ACCURATE WITHIN 45 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 997 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT. 50 KT....... 60NE 0SE 0SW 60NW. 34 KT.......120NE 60SE 80SW 120NW. 12 FT SEAS..210NE 120SE 90SW 210NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 12.0N 34.3W AT 01/2100Z AT 01/1800Z CENTER WAS LOCATED NEAR 11.8N 33.8W FORECAST VALID 02/0600Z 12.7N 35.5W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 50NE 0SE 0SW 50NW. 34 KT...110NE 60SE 60SW 100NW. FORECAST VALID 02/1800Z 13.9N 37.2W MAX WIND 45 KT...GUSTS 55 KT. 34 KT...110NE 60SE 60SW 90NW. FORECAST VALID 03/0600Z 15.6N 39.0W MAX WIND 45 KT...GUSTS 55 KT. 34 KT...110NE 50SE 0SW 70NW. FORECAST VALID 03/1800Z 17.6N 40.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT...100NE 50SE 0SW 70NW. FORECAST VALID 04/0600Z 19.7N 42.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT...100NE 40SE 0SW 60NW. FORECAST VALID 04/1800Z 21.5N 44.5W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 70NE 0SE 0SW 50NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 05/1800Z 24.5N 47.5W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. OUTLOOK VALID 06/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.0N 34.3W NEXT ADVISORY AT 02/0300Z $$ FORECASTER D. ZELINSKY
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