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Tropical Storm Oscar Forecast Discussion Number 13
2024-10-22 10:33:24| National Hurricane Center (Atlantic)
Issued at 500 AM EDT Tue Oct 22 2024 000 WTNT41 KNHC 220833 TCDAT1 Tropical Storm Oscar Discussion Number 13 NWS National Hurricane Center Miami FL AL162024 500 AM EDT Tue Oct 22 2024 Oscar is at best barely a tropical storm at this time. While convection associated with the system has increased since the last advisory, most of it is occurring in clusters well away from the center in the eastern semicircle, and there is only minimal convection near the center. Also, while 850 mb flight-level winds were as high as 45-50 kt during an earlier Air Force Reserve Hurricane Hunter mission, dropsonde and SFMR data suggests those winds were having trouble mixing down to the surface. The system will be maintained as a 35-kt tropical storm pending the next recon flight and whether convection will increase further during the upcoming diurnal maximum. The global models are in good agreement that a developing mid- to upper-level trough over the southwestern Atlantic will cause baroclinic cyclogenesis near or north of Oscar during the next 24-48 h. The UKMET shows Oscar become the main focus for the development and becoming a large extratropical low, while the GFS develops a second low to the north of Oscar with Oscar becoming absorbed into the new system. The ECMWF and Canadian models forecast a blend of these scenarios, with the baroclinic low forming close to Oscar. Given Oscar's organization and current trends in satellite imagery, the intensity forecast leans towards the GFS solution, with Oscar becoming a post-tropical low in less than 24 h and then being absorbed by the new low in 36-48 h. The initial motion is now 030/10 kt. Interaction with the above mentioned trough should steer Oscar generally northeastward with an increase in forward speed until it is absorbed by the new baroclinic low. The new forecast track is similar to the previous track. Key Messages: 1. Through Tuesday, localized flash flooding will be possible across the southeastern Bahamas as well as the Turks and Caicos Islands. With rainfall easing across Cuba, flooding from rainfall which has already occurred could remain a concern for the next several days. 2. Tropical storm conditions are expected in portions of the southeastern and central Bahamas today. FORECAST POSITIONS AND MAX WINDS INIT 22/0900Z 22.7N 74.8W 35 KT 40 MPH 12H 22/1800Z 23.8N 73.8W 35 KT 40 MPH 24H 23/0600Z 25.7N 71.7W 35 KT 40 MPH...POST-TROPICAL 36H 23/1800Z 28.5N 69.5W 35 KT 40 MPH...POST-TROP/EXTRATROP 48H 24/0600Z...DISSIPATED $$ Forecaster Beven
Category:Transportation and Logistics
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Tropical Storm Oscar Wind Speed Probabilities Number 13
2024-10-22 10:32:53| National Hurricane Center (Atlantic)
Issued at 0900 UTC TUE OCT 22 2024 000 FONT11 KNHC 220832 PWSAT1 TROPICAL STORM OSCAR WIND SPEED PROBABILITIES NUMBER 13 NWS NATIONAL HURRICANE CENTER MIAMI FL AL162024 0900 UTC TUE OCT 22 2024 AT 0900Z THE CENTER OF TROPICAL STORM OSCAR WAS LOCATED NEAR LATITUDE 22.7 NORTH...LONGITUDE 74.8 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 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 SAN SALVADOR 34 15 1(16) X(16) X(16) X(16) X(16) X(16) MAYAGUANA 34 17 X(17) X(17) X(17) X(17) X(17) X(17) $$ FORECASTER BEVEN
Category: Transportation and Logistics
Summary for Tropical Storm Oscar (AT1/AL162024)
2024-10-22 10:32:23| National Hurricane Center (Atlantic)
...POORLY ORGANIZED OSCAR MOVING THROUGH THE CENTRAL AND SOUTHEASTERN BAHAMAS... As of 5:00 AM EDT Tue Oct 22 the center of Oscar was located near 22.7, -74.8 with movement NNE at 12 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.
Category: Transportation and Logistics