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Post-Tropical Cyclone Sally Public Advisory Number 26
2020-09-17 17:00:52| National Hurricane Center (Atlantic)
The NHC has issued its final advisory on this system. Public Advisories from the Weather Prediction Center will provide updates as long as the system remains a flood threat. Issued at 1100 AM EDT Thu Sep 17 2020
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US Oil Producers, Exporters Tally Damages from Hurricane Sally, Begin Restarts
2020-09-17 15:33:35| OGI
Crews returned to at least 30 offshore oil and gas platforms.
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Tropical Depression Sally Graphics
2020-09-17 10:32:42| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Thu, 17 Sep 2020 08:32:42 GMT Wind Speed Probabilities last updated Thu, 17 Sep 2020 08:32:42 GMT
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Tropical Depression Sally Wind Speed Probabilities Number 25
2020-09-17 10:31:44| National Hurricane Center (Atlantic)
Issued at 0900 UTC THU SEP 17 2020 000 FONT14 KNHC 170831 PWSAT4 TROPICAL DEPRESSION SALLY WIND SPEED PROBABILITIES NUMBER 25 NWS NATIONAL HURRICANE CENTER MIAMI FL AL192020 0900 UTC THU SEP 17 2020 AT 0900Z THE CENTER OF TROPICAL DEPRESSION SALLY WAS LOCATED NEAR LATITUDE 31.8 NORTH...LONGITUDE 85.7 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 25 KTS...30 MPH...45 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 THU 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 THU 18Z THU 06Z FRI 18Z FRI 06Z SAT 06Z SUN 06Z MON PERIODS TO TO TO TO TO TO TO 18Z THU 06Z FRI 18Z FRI 06Z SAT 06Z SUN 06Z MON 06Z TUE FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT FAYETTEVILLE 34 X X( X) 4( 4) X( 4) X( 4) X( 4) X( 4) NEW RIVER NC 34 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) SURF CITY NC 34 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) WILMINGTON NC 34 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) BALD HEAD ISL 34 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) FLORENCE SC 34 X 1( 1) 4( 5) X( 5) X( 5) X( 5) X( 5) COLUMBIA SC 34 X 3( 3) 2( 5) X( 5) X( 5) X( 5) X( 5) LITTLE RIVER 34 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) MYRTLE BEACH 34 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) AUGUSTA GA 34 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) COLUMBUS GA 34 4 X( 4) X( 4) X( 4) X( 4) X( 4) X( 4) $$ FORECASTER STEWART
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Tropical Depression Sally Forecast Discussion Number 25
2020-09-17 10:31:43| National Hurricane Center (Atlantic)
Issued at 400 AM CDT Thu Sep 17 2020 000 WTNT44 KNHC 170831 TCDAT4 Tropical Depression Sally Discussion Number 25 NWS National Hurricane Center Miami FL AL192020 400 AM CDT Thu Sep 17 2020 Although the overall convective cloud and rain shield in satellite and radar imagery continues to erode, Tropical Depression Sally is still producing significant rainfall across east-central Alabama and west-central and central Georgia. Surface observations and Doppler radar data indicate that Sally has weakened to a 25-kt depression over southeastern Alabama. Sally will continue to weaken, and fairly rapidly at that, due to increasing friction and loss of convection owing to very hostile westerly to southwesterly vertical wind shear in excess of 40 kt. Sally will likely degenerate into a remnant low pressure system by tonight or early Friday, and merge with a frontal system over North Carolina by Friday evening. Sally is moving northeastward or 055/10 kt. A northeastward to east-northeastward motion will continue for the next 36 hours or so as the cyclone moves ahead of a broad deep-layer trough over the northeastern United States. The official track forecast is down the middle of the tightly packed NHC model guidance suite, and lies close to the previous advisory track and the consensus model HCCA. This is the last NHC advisory on Sally. Future information on this system, including the rainfall threat, can be found in Public Advisories issued by the Weather Prediction Center beginning at 10 AM CDT, under AWIPS header TCPAT3, WMO header WTNT34 KWNH, and on the web at http://www.wpc.ncep.noaa.gov KEY MESSAGES: 1. Widespread flooding is expected from central Georgia through southeastern Virginia. Along the central Gulf Coast, most widespread moderate to major river flooding from the historic rainfall event will crest by the weekend, but rivers will remain elevated well into next week. FORECAST POSITIONS AND MAX WINDS INIT 17/0900Z 31.8N 85.7W 25 KT 30 MPH...INLAND 12H 17/1800Z 32.8N 84.2W 25 KT 30 MPH...INLAND 24H 18/0600Z 34.0N 81.3W 20 KT 25 MPH...POST-TROP/REMNT LOW 36H 18/1800Z 35.1N 78.4W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 19/0600Z...MERGED WITH FRONTAL SYSTEM $$ Forecaster Stewart
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