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Summary for Hurricane Isaac (AT5/AL102024)
2024-09-27 16:39:24| National Hurricane Center (Atlantic)
...HURRICANE ISAAC HEADING EASTWARD OVER THE NORTH CENTRAL ATLANTIC OCEAN... As of 11:00 AM AST Fri Sep 27 the center of Isaac was located near 37.4, -46.8 with movement ENE at 18 mph. The minimum central pressure was 981 mb with maximum sustained winds of about 75 mph.
Category:Transportation and Logistics
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Tropical Storm Helene Forecast Discussion Number 17
2024-09-27 16:36:56| National Hurricane Center (Atlantic)
Issued at 1100 AM EDT Fri Sep 27 2024 000 WTNT44 KNHC 271436 TCDAT4 Tropical Storm Helene Discussion Number 17 NWS National Hurricane Center Miami FL AL092024 1100 AM EDT Fri Sep 27 2024 Helene has been racing northward and the low-level center is now located over the southern Appalachians. Strong bands of heavy rain and very gusty winds continue off and along the South Carolina coast. In addition, wind gusts to around hurricane force have been occurring this morning in portions of northeastern Georgia and the western portions of the Carolinas, especially in areas of higher terrain. The initial intensity is set at 40 kt, and these sustained winds are likely occurring off the south Carolina coast and over the Appalachians. The main hazard is the very heavy rainfall ongoing over portions of the southeastern U.S., which is causing historic and life-threatening flooding. Helene is expected to move slower to the northwest later today and then stall over the Tennessee Valley tonight and through the weekend as it merges with a mid- to upper-level low. This merger will also lead to extratropical transition, which is expected to occur later today. The expected slow motion could result in significant flooding over the Ohio and Tennessee Valleys, and over the southern Appalachians through the weekend. KEY MESSAGES: 1. Historic, catastrophic and life-threatening flash and urban flooding, including numerous significant landslides, will continue across portions of the Southern Appalachians through this evening. Widespread significant river flooding is ongoing, some of which will be major to record breaking. 2. Damaging wind gusts will continue over portions of Georgia, the Carolinas, Tennessee, and Kentucky today, particularly over the higher terrain of the southern Appalachians. 3. There is a possibility of long-duration power outages in portions of the southeast U.S. If you use a generator after the storm, be sure it is placed outside at least 20 feet away from doors, windows, and garages to avoid deadly carbon monoxide poisoning. FORECAST POSITIONS AND MAX WINDS INIT 27/1500Z 35.1N 83.8W 40 KT 45 MPH 12H 28/0000Z 37.3N 85.6W 30 KT 35 MPH...POST-TROP/EXTRATROP 24H 28/1200Z 37.5N 86.5W 25 KT 30 MPH...POST-TROP/EXTRATROP 36H 29/0000Z 37.5N 86.4W 20 KT 25 MPH...POST-TROP/EXTRATROP 48H 29/1200Z 37.5N 86.1W 20 KT 25 MPH...POST-TROP/EXTRATROP 60H 30/0000Z 37.6N 85.7W 20 KT 25 MPH...POST-TROP/EXTRATROP 72H 30/1200Z...DISSIPATED $$ Forecaster Cangialosi/Rosado
Category: Transportation and Logistics
Tropical Storm Helene Wind Speed Probabilities Number 17
2024-09-27 16:36:56| National Hurricane Center (Atlantic)
Issued at 1500 UTC FRI SEP 27 2024 000 FONT14 KNHC 271436 PWSAT4 TROPICAL STORM HELENE WIND SPEED PROBABILITIES NUMBER 17 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092024 1500 UTC FRI SEP 27 2024 AT 1500Z THE CENTER OF TROPICAL STORM HELENE WAS LOCATED NEAR LATITUDE 35.1 NORTH...LONGITUDE 83.8 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 12Z 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 12Z FRI 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE PERIODS TO TO TO TO TO TO TO 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE 12Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT CHARLOTTE NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) FLORENCE SC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) COLUMBIA SC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) GEORGETOWN SC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) CHARLESTON SC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) BEAUFORT MCAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ATLANTA GA 34 19 X(19) X(19) X(19) X(19) X(19) X(19) AUGUSTA GA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) SAVANNAH GA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) MACON GA 34 28 X(28) X(28) X(28) X(28) X(28) X(28) $$ FORECASTER CANGIALOSI
Category: Transportation and Logistics