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Hurricane Sally Graphics
2020-09-16 04:59:03| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Wed, 16 Sep 2020 02:59:03 GMT Wind Speed Probabilities last updated Wed, 16 Sep 2020 03:32:29 GMT
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Hurricane Sally Forecast Discussion Number 19
2020-09-16 04:57:52| National Hurricane Center (Atlantic)
Issued at 1000 PM CDT Tue Sep 15 2020 000 WTNT44 KNHC 160257 TCDAT4 Hurricane Sally Discussion Number 19 NWS National Hurricane Center Miami FL AL192020 1000 PM CDT Tue Sep 15 2020 Observations from an Air Force Hurricane Hunter aircraft and WSR-88D Doppler radar data indicate some strengthening. The eye has become a little better defined on the radar, and the central pressure has fallen to 972 mb. The eye has also become evident on recent IR imagery. Using a blend of flight-level and SFMR-observed surface winds, along with the Doppler velocities, gives a current intensity estimate of 75 kt. Given the recent trends, the official forecast allows for some more intensification before landfall, which is likely to occur in less than 12 hours. Rapid weakening will occur after the center moves inland, and the system should become a remnant low in a couple of days. This is consistent with the model guidance. Radar and aircraft center fixes indicate that the motion is now north-northeastward, or 020/2 kt. Sally should move north-northeastward, and then northeastward, with a gradual increase in forward speed, along the northwestern side of a weak mid-level high pressure area for the next couple of days. Then, as the system approaches the westerly flow at higher latitudes, the cyclone should turn toward the east-northeast with a slight further increase in forward speed until becoming a dissipating remnant low near the southeast U.S. coast in 2-3 days. The official forecast is close to the latest corrected dynamical model consensus, HCCA, prediction. KEY MESSAGES: 1. Historic, life-threatening flash flooding due to rainfall is likely through Wednesday along and just inland of the coast from the Florida Panhandle west of the Apalachicola River to the Alabama/Mississippi border. Widespread moderate to major river flooding is forecast across the Florida Panhandle and southern Alabama. Significant flash and urban flooding, as well as widespread minor to moderate river flooding, is likely across inland portions of Mississippi and Alabama, and into Georgia and the western Carolinas this week. 2. Life-threatening storm surge is expected along portions of the coastline from Alabama to the western Florida Panhandle, including Mobile Bay. 3. Hurricane conditions are expected this evening and overnight within portions of the Hurricane Warning area along the Mississippi and Alabama coastlines and the western Florida Panhandle. FORECAST POSITIONS AND MAX WINDS INIT 16/0300Z 29.8N 87.8W 75 KT 85 MPH 12H 16/1200Z 30.3N 87.5W 80 KT 90 MPH...ON THE COAST 24H 17/0000Z 31.2N 86.8W 40 KT 45 MPH...INLAND 36H 17/1200Z 32.0N 85.7W 30 KT 35 MPH...INLAND 48H 18/0000Z 32.9N 83.9W 25 KT 30 MPH...INLAND 60H 18/1200Z 33.6N 81.5W 20 KT 25 MPH...INLAND 72H 19/0000Z 34.0N 79.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 96H 20/0000Z...DISSIPATED $$ Forecaster Pasch
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Hurricane Sally Storm Surge Watch/Warning Map
2020-09-16 04:57:17| National Hurricane Center (Atlantic)
Storm Surge Watch/Warning Map last updated Wed, 16 Sep 2020 02:57:17 GMT
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Hurricane Sally Wind Speed Probabilities Number 19
2020-09-16 04:55:53| National Hurricane Center (Atlantic)
Issued at 0300 UTC WED SEP 16 2020 000 FONT14 KNHC 160255 PWSAT4 HURRICANE SALLY WIND SPEED PROBABILITIES NUMBER 19 NWS NATIONAL HURRICANE CENTER MIAMI FL AL192020 0300 UTC WED SEP 16 2020 AT 0300Z THE CENTER OF HURRICANE SALLY WAS LOCATED NEAR LATITUDE 29.8 NORTH...LONGITUDE 87.8 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 75 KTS...85 MPH...140 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 WED 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 WED 12Z WED 00Z THU 12Z THU 00Z FRI 00Z SAT 00Z SUN PERIODS TO TO TO TO TO TO TO 12Z WED 00Z THU 12Z THU 00Z FRI 00Z SAT 00Z SUN 00Z MON FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT CAPE HATTERAS 34 X X( X) X( X) X( X) 6( 6) X( 6) X( 6) FAYETTEVILLE 34 X X( X) X( X) X( X) 5( 5) X( 5) X( 5) CHARLOTTE NC 34 X X( X) X( X) 1( 1) 2( 3) X( 3) X( 3) CHERRY PT NC 34 X X( X) X( X) X( X) 6( 6) X( 6) X( 6) NEW RIVER NC 34 X X( X) X( X) X( X) 7( 7) X( 7) X( 7) MOREHEAD CITY 34 X X( X) X( X) X( X) 10(10) X(10) X(10) MOREHEAD CITY 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) MOREHEAD CITY 64 X X( X) X( X) X( X) 1( 1) X( 1) X( 1) SURF CITY NC 34 X X( X) X( X) X( X) 12(12) X(12) X(12) SURF CITY NC 50 X X( X) X( X) X( X) 4( 4) X( 4) X( 4) SURF CITY NC 64 X X( X) X( X) X( X) 1( 1) X( 1) X( 1) WILMINGTON NC 34 X X( X) X( X) X( X) 10(10) X(10) X(10) BALD HEAD ISL 34 X X( X) X( X) X( X) 14(14) X(14) X(14) BALD HEAD ISL 50 X X( X) X( X) X( X) 7( 7) X( 7) X( 7) BALD HEAD ISL 64 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) FLORENCE SC 34 X X( X) X( X) 1( 1) 8( 9) X( 9) X( 9) COLUMBIA SC 34 X X( X) 1( 1) 1( 2) 6( 8) X( 8) X( 8) LITTLE RIVER 34 X X( X) X( X) X( X) 13(13) X(13) X(13) LITTLE RIVER 50 X X( X) X( X) X( X) 6( 6) X( 6) X( 6) LITTLE RIVER 64 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) MYRTLE BEACH 34 X X( X) X( X) X( X) 14(14) X(14) X(14) MYRTLE BEACH 50 X X( X) X( X) X( X) 7( 7) X( 7) X( 7) MYRTLE BEACH 64 X X( X) X( X) X( X) 2( 2) X( 2) X( 2) GEORGETOWN SC 34 X X( X) X( X) 1( 1) 11(12) X(12) X(12) GEORGETOWN SC 50 X X( X) X( X) X( X) 4( 4) X( 4) X( 4) GEORGETOWN SC 64 X X( X) X( X) X( X) 1( 1) X( 1) X( 1) CHARLESTON SC 34 X X( X) X( X) 1( 1) 12(13) X(13) X(13) CHARLESTON SC 50 X X( X) X( X) X( X) 5( 5) X( 5) X( 5) CHARLESTON SC 64 X X( X) X( X) X( X) 2( 2) X( 2) X( 2) BEAUFORT MCAS 34 X X( X) 1( 1) 1( 2) 8(10) X(10) X(10) BEAUFORT MCAS 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) ATLANTA GA 34 2 2( 4) 2( 6) 2( 8) 1( 9) X( 9) X( 9) AUGUSTA GA 34 X 2( 2) X( 2) 3( 5) 4( 9) X( 9) X( 9) SAVANNAH GA 34 X 1( 1) X( 1) 1( 2) 6( 8) X( 8) X( 8) KINGS BAY GA 34 1 1( 2) 1( 3) X( 3) 4( 7) X( 7) X( 7) WAYCROSS GA 34 2 2( 4) 1( 5) 1( 6) 2( 8) X( 8) X( 8) MAYPORT NS FL 34 X 2( 2) X( 2) X( 2) 4( 6) X( 6) X( 6) JACKSONVILLE 34 1 2( 3) X( 3) 1( 4) 2( 6) X( 6) X( 6) GAINESVILLE FL 34 2 2( 4) X( 4) 1( 5) 1( 6) X( 6) X( 6) THE VILLAGES 34 1 1( 2) X( 2) X( 2) 1( 3) X( 3) X( 3) TAMPA FL 34 1 1( 2) X( 2) X( 2) 1( 3) X( 3) X( 3) CEDAR KEY FL 34 2 3( 5) X( 5) X( 5) 1( 6) X( 6) X( 6) TALLAHASSEE FL 34 4 6(10) 2(12) 1(13) X(13) X(13) X(13) ST MARKS FL 34 3 6( 9) 1(10) X(10) 1(11) X(11) X(11) APALACHICOLA 34 13 7(20) 1(21) X(21) X(21) X(21) X(21) GFMX 290N 850W 34 6 5(11) X(11) X(11) X(11) X(11) X(11) PANAMA CITY FL 34 60 6(66) X(66) X(66) X(66) X(66) X(66) PANAMA CITY FL 50 3 2( 5) X( 5) X( 5) X( 5) X( 5) X( 5) DESTIN EXEC AP 34 99 X(99) X(99) X(99) X(99) X(99) X(99) DESTIN EXEC AP 50 39 12(51) 1(52) X(52) X(52) X(52) X(52) DESTIN EXEC AP 64 5 3( 8) X( 8) X( 8) X( 8) X( 8) X( 8) COLUMBUS GA 34 3 8(11) 9(20) 2(22) X(22) X(22) X(22) BIRMINGHAM AL 34 3 3( 6) 1( 7) X( 7) X( 7) X( 7) X( 7) MONTGOMERY AL 34 15 19(34) 6(40) 1(41) X(41) X(41) X(41) MONTGOMERY AL 50 1 3( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) WHITING FLD FL 34 99 X(99) X(99) X(99) X(99) X(99) X(99) WHITING FLD FL 50 74 10(84) X(84) 1(85) X(85) X(85) X(85) WHITING FLD FL 64 36 10(46) 1(47) X(47) X(47) X(47) X(47) PENSACOLA FL 34 99 X(99) X(99) X(99) X(99) X(99) X(99) PENSACOLA FL 50 89 4(93) X(93) X(93) X(93) X(93) X(93) PENSACOLA FL 64 51 10(61) 1(62) X(62) X(62) X(62) X(62) GFMX 290N 870W 34 99 X(99) X(99) X(99) X(99) X(99) X(99) GFMX 290N 870W 50 3 1( 4) X( 4) X( 4) X( 4) X( 4) X( 4) MOBILE AL 34 99 X(99) X(99) X(99) X(99) X(99) X(99) MOBILE AL 50 39 3(42) X(42) X(42) X(42) X(42) X(42) MOBILE AL 64 9 1(10) X(10) X(10) X(10) X(10) X(10) GULFPORT MS 34 43 3(46) 1(47) X(47) X(47) X(47) X(47) GULFPORT MS 50 3 X( 3) X( 3) X( 3) X( 3) X( 3) X( 3) STENNIS MS 34 11 3(14) 1(15) X(15) X(15) X(15) X(15) BURAS LA 34 5 1( 6) 1( 7) X( 7) X( 7) X( 7) X( 7) GFMX 280N 890W 34 4 2( 6) X( 6) X( 6) X( 6) X( 6) X( 6) JACKSON MS 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) NEW ORLEANS LA 34 3 2( 5) X( 5) X( 5) X( 5) X( 5) X( 5) GFMX 280N 910W 34 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) BATON ROUGE LA 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) MORGAN CITY LA 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) ALEXANDRIA LA 34 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) LAFAYETTE LA 34 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) NEW IBERIA LA 34 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) PENSACOLA NAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) PENSACOLA NAS 50 99 X(99) X(99) X(99) X(99) X(99) X(99) PENSACOLA NAS 64 72 4(76) X(76) X(76) X(76) X(76) X(76) KEESLER AB 34 83 1(84) X(84) X(84) X(84) X(84) X(84) KEESLER AB 50 7 X( 7) X( 7) X( 7) X( 7) X( 7) X( 7) $$ FORECASTER PASCH
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Hurricane Sally Public Advisory Number 19
2020-09-16 04:55:50| National Hurricane Center (Atlantic)
Issued at 1000 PM CDT Tue Sep 15 2020 000 WTNT34 KNHC 160255 TCPAT4 BULLETIN Hurricane Sally Advisory Number 19 NWS National Hurricane Center Miami FL AL192020 1000 PM CDT Tue Sep 15 2020 ...HURRICANE CONDITIONS EXPECTED TO REACH PORTIONS OF THE NORTH-CENTRAL GULF COAST LATE TONIGHT AND EARLY WEDNESDAY... ...HISTORIC LIFE-THREATENING FLOODING LIKELY ALONG PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...29.8N 87.8W ABOUT 65 MI...105 KM SSE OF MOBILE ALABAMA ABOUT 60 MI...95 KM SW OF PENSACOLA FLORIDA MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 2 MPH...4 KM/H MINIMUM CENTRAL PRESSURE...972 MB...28.71 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Storm Surge Warning has been extended east of the Okaloosa/Walton County Line to the Walton/Bay County Line Florida. The Hurricane Warning has been extended east of Navarre Florida to the Okaloosa/Walton County line Florida. The Storm Surge Warning has been discontinued between the Mouth of the Pearl River and the Mississippi/Alabama border. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Mississippi/Alabama border to the Walton/Bay County Line Florida * Mobile Bay * Mouth of the Mississippi River to the Mouth of the Pearl River A Hurricane Warning is in effect for... * East of Bay St. Louis Mississippi to the Okaloosa/Walton County line Florida A Tropical Storm Warning is in effect for... * East of the Okaloosa/Walton County line Florida to Indian Pass Florida * Bay St. Louis Mississippi westward to Grand Isle Louisiana A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 1000 PM CDT (0300 UTC), the center of Hurricane Sally was located near latitude 29.8 North, longitude 87.8 West. Sally is moving toward the north-northeast near 2 mph (4 km/h). A north-northeastward to northeastward motion at a slightly faster forward speed is expected on Wednesday and Wednesday night, followed by a faster northeastward motion on Thursday. On the forecast track, the center of Sally will approach the northern Gulf Coast tonight, and make landfall in the hurricane warning area early Wednesday. Sally is expected to move inland across southeastern Alabama Wednesday night and Thursday. Maximum sustained winds are near 85 mph (140 km/h) with higher gusts. Some strengthening is possible before landfall, and Sally is expected to be a dangerous hurricane when it moves onshore along the north-central Gulf Coast. Hurricane-force winds extend outward up to 40 miles (65 km) from the center and tropical-storm-force winds extend outward up to 125 miles (205 km). The minimum central pressure reported by the Hurricane Hunters is 972 mb (28.71 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sally can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml RAINFALL: Sally is forecast to produce 10 to 20 inches of rainfall with isolated amounts of 30 inches along and just inland of the central Gulf Coast from the Florida Panhandle west of the Apalachicola River to the Alabama/Mississippi border. Historic, life-threatening flash flooding is likely. In addition, this rainfall will lead to widespread moderate to major flooding on area rivers. Sally is forecast to turn inland Wednesday and track across the Southeast producing rainfall of 4 to 8 inches, with isolated maximum amounts of 12 inches, across portions of southeastern Mississippi, southern and central Alabama, central and northern Georgia, and the western Carolinas. Significant flash and urban flooding is likely, as well as widespread minor to moderate flooding on some rivers. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Dauphin Island AL to Okaloosa/Walton County FL Line...4-6 ft Pensacola Bay and Choctawhatchee Bay FL...4-6 ft Mobile Bay...3-5 ft Okaloosa/Walton County Line to Walton/Bay County line FL...2-4 ft Mouth of the Mississippi River to Mouth of the Pearl River including Lakes Pontchartrain, Maurepas and Borgne...2-4 ft MS/AL Border to Dauphin Island AL...2-4 ft Walton/Bay County line to Chassahowitzka FL including Saint Andrew Bay...1-3 ft Mouth of the Pearl River to MS/AL Border...1-3 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and damaging waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Hurricane conditions are expected to begin within the hurricane warning area later tonight. Tropical storm conditions are already occurring in portions of the warning areas, and will continue through Wednesday night. TORNADOES: A few tornadoes may occur through Wednesday across portions of the Florida Panhandle and southern Alabama. SURF: Swells from Sally will continue to affect the coast from the Florida Big Bend westward to southeastern Louisiana during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 100 AM CDT. Next complete advisory at 400 AM CDT. $$ Forecaster Pasch
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