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Tropical Storm Rose Wind Speed Probabilities Number 5
2021-09-20 10:42:51| National Hurricane Center (Atlantic)
Issued at 0900 UTC MON SEP 20 2021 000 FONT12 KNHC 200842 PWSAT2 TROPICAL STORM ROSE WIND SPEED PROBABILITIES NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL AL172021 0900 UTC MON SEP 20 2021 AT 0900Z THE CENTER OF TROPICAL STORM ROSE WAS LOCATED NEAR LATITUDE 15.9 NORTH...LONGITUDE 32.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 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 06Z MON 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 06Z MON 18Z MON 06Z TUE 18Z TUE 06Z WED 06Z THU 06Z FRI PERIODS TO TO TO TO TO TO TO 18Z MON 06Z TUE 18Z TUE 06Z WED 06Z THU 06Z FRI 06Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER STEWART
Tropical Storm Rose Forecast Advisory Number 5
2021-09-20 10:42:30| National Hurricane Center (Atlantic)
Issued at 0900 UTC MON SEP 20 2021 000 WTNT22 KNHC 200842 TCMAT2 TROPICAL STORM ROSE FORECAST/ADVISORY NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL AL172021 0900 UTC MON SEP 20 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 15.9N 32.6W AT 20/0900Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 30NE 30SE 0SW 0NW. 12 FT SEAS.. 60NE 0SE 0SW 0NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 15.9N 32.6W AT 20/0900Z AT 20/0600Z CENTER WAS LOCATED NEAR 15.4N 32.1W FORECAST VALID 20/1800Z 17.5N 33.8W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 40NE 40SE 0SW 0NW. FORECAST VALID 21/0600Z 19.8N 35.5W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 50NE 40SE 0SW 0NW. FORECAST VALID 21/1800Z 21.7N 36.7W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 50NE 40SE 0SW 0NW. FORECAST VALID 22/0600Z 23.0N 37.7W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 50NE 40SE 0SW 0NW. FORECAST VALID 22/1800Z 24.2N 38.7W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 50NE 40SE 0SW 0NW. FORECAST VALID 23/0600Z 25.2N 39.8W MAX WIND 30 KT...GUSTS 40 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 24/0600Z 27.3N 41.3W MAX WIND 25 KT...GUSTS 35 KT. OUTLOOK VALID 25/0600Z 29.2N 40.6W MAX WIND 25 KT...GUSTS 35 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.9N 32.6W NEXT ADVISORY AT 20/1500Z $$ FORECASTER STEWART
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Tropical Storm Rose Graphics
2021-09-20 04:51:14| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Mon, 20 Sep 2021 02:51:14 GMT Wind Speed Probabilities last updated Mon, 20 Sep 2021 03:28:39 GMT
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Tropical Storm Rose Forecast Discussion Number 4
2021-09-20 04:50:08| National Hurricane Center (Atlantic)
Issued at 1100 PM AST Sun Sep 19 2021 000 WTNT42 KNHC 200250 TCDAT2 Tropical Storm Rose Discussion Number 4 NWS National Hurricane Center Miami FL AL172021 1100 PM AST Sun Sep 19 2021 The center of Rose has been very difficult to locate in infrared satellite imagery this evening. However, an earlier ASCAT-A overpass as well as an SSMIS microwave image from around of the time of the previous advisory were both helpful in establishing the initial position, motion, and intensity of the tropical cyclone. Rose's center is located on the eastern edge of the main convective mass due to some southeasterly shear. The ASCAT ambiguity data revealed an area of 30-35 kt winds around the southeastern portion of the circulation, so the wind speed remains 35 kt for this advisory. This is also in agreement with subjective Dvorak T-numbers of T2.5 form both SAB and TAFB. The ASCAT data indicated that Rose is located slightly west of the earlier estimates, and the initial motion estimate is now northwestward or 320/14 kt. The cyclone is forecast to move generally northwestward during the next several days around the southwestern and western portions of a subtropical ridge located over the far eastern Atlantic. After day 4, a strong mid- to upper-level trough over the north-central Atlantic should cause Rose to turn northward. The dynamical models are in reasonably good agreement through about 60-72 hours, but there is growing east-to-west (cross-track) spread after that time. The NHC track forecast is not too different from the previous advisory, and lies close to the various consensus models in deference to the increasing model spread late in the period. Rose has about 24 hours over warm waters and in low vertical wind shear conditions in which to strengthen, and the new NHC intensity forecast for that time is unchanged from before. After 24 hours, increasing westerly shear is likely to result in some gradual weakening. A further increase in shear is anticipated by day 3 as Rose approaches the aforementioned trough. This is likely to result in additional weakening, and Rose is forecast to weaken to a tropical depression by day 4. Some of the global model guidance suggests that weakening could occur faster than indicated below, and it is possible that Rose will degenerate into a remnant low by the end of the forecast period. FORECAST POSITIONS AND MAX WINDS INIT 20/0300Z 15.3N 31.1W 35 KT 40 MPH 12H 20/1200Z 16.9N 32.6W 40 KT 45 MPH 24H 21/0000Z 18.9N 34.2W 45 KT 50 MPH 36H 21/1200Z 20.9N 35.5W 40 KT 45 MPH 48H 22/0000Z 22.6N 36.6W 40 KT 45 MPH 60H 22/1200Z 23.9N 37.5W 40 KT 45 MPH 72H 23/0000Z 25.0N 38.7W 35 KT 40 MPH 96H 24/0000Z 27.1N 40.8W 30 KT 35 MPH 120H 25/0000Z 29.0N 40.5W 30 KT 35 MPH $$ Forecaster Brown
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Tropical Storm Rose Wind Speed Probabilities Number 4
2021-09-20 04:49:39| National Hurricane Center (Atlantic)
Issued at 0300 UTC MON SEP 20 2021 595 FONT12 KNHC 200249 PWSAT2 TROPICAL STORM ROSE WIND SPEED PROBABILITIES NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL172021 0300 UTC MON SEP 20 2021 AT 0300Z THE CENTER OF TROPICAL STORM ROSE WAS LOCATED NEAR LATITUDE 15.3 NORTH...LONGITUDE 31.1 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 00Z MON AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 00Z MON 12Z MON 00Z TUE 12Z TUE 00Z WED 00Z THU 00Z FRI PERIODS TO TO TO TO TO TO TO 12Z MON 00Z TUE 12Z TUE 00Z WED 00Z THU 00Z FRI 00Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER BROWN
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