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Tropical Storm Rose Graphics

2021-09-21 10:42:41| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Tue, 21 Sep 2021 08:42:41 GMT Wind Speed Probabilities last updated Tue, 21 Sep 2021 09:28:30 GMT

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Tropical Storm Rose Forecast Discussion Number 9

2021-09-21 10:37:16| National Hurricane Center (Atlantic)

Issued at 500 AM AST Tue Sep 21 2021 000 WTNT42 KNHC 210837 TCDAT2 Tropical Storm Rose Discussion Number 9 NWS National Hurricane Center Miami FL AL172021 500 AM AST Tue Sep 21 2021 Rose has lost organization over the past several hours. Satellite images show a fully exposed low-level center with only a small area of deep convection lingering in the southeastern quadrant. The Dvorak classifications have decreased, and the initial intensity is nudged downward to 40 kt. Rose is moving northwestward at 17 kt. This general heading but with a decrease in forward speed is expected during the next couple of days as the storm is steered by the flow on the southwest side of a low- to mid-level ridge. By late this week and over the weekend, a sharp turn to the north and then the northeast is expected as Rose becomes embedded in the flow on the south side of a broad deep-layer trough. Although there is some spread in the guidance, the models all show the same general theme. The NHC track forecast lies near the middle of the guidance envelope. The environment is expected to become increasingly unfavorable for Rose during the next several days with westerly shear increasing and dry air expected to wrap into the circulation. These conditions should promote a weakening trend, and the cyclone is forecast to become a remnant low by the weekend when it should be over cooler waters and in an environment of more than 30 kt of shear. Some of the models suggest that Rose could become a remnant low or open into a trough sooner than that, and if the current trend continues that is a distinct possibility. The new forecast is largely an update of the previous one, but does show the storm becoming a remnant low a day earlier. FORECAST POSITIONS AND MAX WINDS INIT 21/0900Z 21.0N 36.4W 40 KT 45 MPH 12H 21/1800Z 22.4N 37.2W 40 KT 45 MPH 24H 22/0600Z 23.8N 38.3W 35 KT 40 MPH 36H 22/1800Z 25.0N 39.5W 30 KT 35 MPH 48H 23/0600Z 26.4N 40.6W 30 KT 35 MPH 60H 23/1800Z 27.7N 41.0W 30 KT 35 MPH 72H 24/0600Z 29.0N 40.4W 30 KT 35 MPH 96H 25/0600Z 30.7N 36.6W 25 KT 30 MPH...POST-TROP/REMNT LOW 120H 26/0600Z 32.8N 31.4W 25 KT 30 MPH...POST-TROP/REMNT LOW $$ Forecaster Cangialosi

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Summary for Tropical Storm Rose (AT2/AL172021)

2021-09-21 10:36:48| National Hurricane Center (Atlantic)

...ROSE BEGINS TO WEAKEN... As of 5:00 AM AST Tue Sep 21 the center of Rose was located near 21.0, -36.4 with movement NW at 20 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 45 mph.

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Tropical Storm Rose Public Advisory Number 9

2021-09-21 10:36:48| National Hurricane Center (Atlantic)

Issued at 500 AM AST Tue Sep 21 2021 000 WTNT32 KNHC 210836 TCPAT2 BULLETIN Tropical Storm Rose Advisory Number 9 NWS National Hurricane Center Miami FL AL172021 500 AM AST Tue Sep 21 2021 ...ROSE BEGINS TO WEAKEN... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...21.0N 36.4W ABOUT 880 MI...1420 KM WNW OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 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 Storm Rose was located near latitude 21.0 North, longitude 36.4 West. Rose is moving toward the northwest near 20 mph (31 km/h). A slower northwestward motion is expected during the next couple of days followed by a turn to the north. Maximum sustained winds have decreased to near 45 mph (75 km/h) with higher gusts. Continued slow weakening is expected during the next few days. Tropical-storm-force winds extend outward up to 90 miles (150 km) from the center. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi

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Tropical Storm Rose Wind Speed Probabilities Number 9

2021-09-21 10:36:48| National Hurricane Center (Atlantic)

Issued at 0900 UTC TUE SEP 21 2021 000 FONT12 KNHC 210836 PWSAT2 TROPICAL STORM ROSE WIND SPEED PROBABILITIES NUMBER 9 NWS NATIONAL HURRICANE CENTER MIAMI FL AL172021 0900 UTC TUE SEP 21 2021 AT 0900Z THE CENTER OF TROPICAL STORM ROSE WAS LOCATED NEAR LATITUDE 21.0 NORTH...LONGITUDE 36.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 40 KTS...45 MPH...75 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 TUE 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 TUE 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT PERIODS TO TO TO TO TO TO TO 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT 06Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER CANGIALOSI

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