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Hurricane Teddy Forecast Advisory Number 15

2020-09-16 08:43:54| National Hurricane Center (Atlantic)

Issued at 0700 UTC WED SEP 16 2020 000 WTNT25 KNHC 160643 TCMAT5 HURRICANE TEDDY SPECIAL FORECAST/ADVISORY NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL AL202020 0700 UTC WED SEP 16 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. HURRICANE CENTER LOCATED NEAR 15.5N 48.7W AT 16/0700Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 981 MB MAX SUSTAINED WINDS 80 KT WITH GUSTS TO 100 KT. 64 KT....... 20NE 10SE 10SW 20NW. 50 KT....... 40NE 30SE 20SW 30NW. 34 KT.......140NE 80SE 40SW 150NW. 12 FT SEAS..300NE 240SE 120SW 150NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 15.5N 48.7W AT 16/0700Z AT 16/0000Z CENTER WAS LOCATED NEAR 14.7N 48.0W FORECAST VALID 16/1200Z 16.0N 49.2W MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 25NE 20SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 40NW. 34 KT...140NE 80SE 50SW 130NW. FORECAST VALID 17/0000Z 17.3N 50.5W MAX WIND 95 KT...GUSTS 115 KT. 64 KT... 30NE 20SE 15SW 25NW. 50 KT... 60NE 40SE 30SW 50NW. 34 KT...140NE 110SE 70SW 130NW. FORECAST VALID 17/1200Z 18.8N 52.0W MAX WIND 100 KT...GUSTS 120 KT. 64 KT... 40NE 25SE 20SW 30NW. 50 KT... 70NE 50SE 40SW 60NW. 34 KT...140NE 110SE 80SW 130NW. FORECAST VALID 18/0000Z 20.2N 53.4W MAX WIND 105 KT...GUSTS 125 KT. 64 KT... 40NE 30SE 25SW 40NW. 50 KT... 70NE 60SE 50SW 60NW. 34 KT...140NE 110SE 80SW 130NW. FORECAST VALID 18/1200Z 21.6N 54.8W MAX WIND 100 KT...GUSTS 120 KT. 50 KT... 80NE 70SE 60SW 70NW. 34 KT...140NE 120SE 100SW 130NW. FORECAST VALID 19/0000Z 23.0N 56.2W MAX WIND 100 KT...GUSTS 120 KT. 50 KT... 90NE 80SE 60SW 80NW. 34 KT...150NE 130SE 110SW 130NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 20/0000Z 26.5N 60.0W MAX WIND 100 KT...GUSTS 120 KT. OUTLOOK VALID 21/0000Z 29.5N 62.5W MAX WIND 95 KT...GUSTS 115 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.5N 48.7W NEXT ADVISORY AT 16/0900Z $$ FORECASTER BLAKE

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Hurricane Sally Forecast Discussion Number 20

2020-09-16 08:43:26| National Hurricane Center (Atlantic)

Issued at 130 AM CDT Wed Sep 16 2020 000 WTNT44 KNHC 160643 TCDAT4 Hurricane Sally Special Discussion Number 20 NWS National Hurricane Center Miami FL AL192020 130 AM CDT Wed Sep 16 2020 Justification for this special advisory is to increase the initial intensity and the 12-h forecast intensity at landfall. Observations from an Air Force Hurricane Hunter aircraft and Mobile Alabama WSR-88D Doppler radar data indicate that Sally has continued to strengthen this morning. Radar data show that Sally's eye has become better defined and Doppler velocities in the northern eyewall have reached average values of at least 110 kt between 5000-6000 ft ASL, which supports an equivalent surface wind speed of about 89 kt. The reconnaissance aircraft has recently measured peak 700-mb flight-level winds of 103 kt, which equates to about 93 kt using a standard 90 percent adjustment factor, while peak SFMR surface wind speed have been 85 kt. In addition, a recent dropsonde in the northeast eyewall measured an average wind speed of 113 kt in the lowest 150 meters, which equates to about a 94-kt surface wind. However, those winds appeared to be possibly contaminated by wind gusts. Based on the above data, the initial intensity has been increased to 90 kt. Some additional slight strengthening is possible until landfall occur, and Sally could peak at 95 kt. 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 latest model guidance. Radar and aircraft center fixes indicate that Sally's motion is north-northeastward, or 030/02 kt. No changes were made to the previous track forecast. Sally should continue to move north-northeastward this morning, and then turn northeastward with a gradual increase in forward speed by tonight. That motion will then continue for the next day or so. Then, as Sally 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 morning and then continue into this afternoon within portions of the Hurricane Warning area along the Mississippi and Alabama coastlines and the western Florida Panhandle. FORECAST POSITIONS AND MAX WINDS INIT 16/0630Z 29.9N 87.8W 90 KT 105 MPH 12H 16/1200Z 30.3N 87.5W 95 KT 110 MPH 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 Stewart

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Hurricane Sally Wind Speed Probabilities Number 20

2020-09-16 08:41:42| National Hurricane Center (Atlantic)

Issued at 0630 UTC WED SEP 16 2020 000 FONT14 KNHC 160641 PWSAT4 HURRICANE SALLY SPECIAL WIND SPEED PROBABILITIES NUMBER 20 NWS NATIONAL HURRICANE CENTER MIAMI FL AL192020 0630 UTC WED SEP 16 2020 AT 0630Z THE CENTER OF HURRICANE SALLY WAS LOCATED NEAR LATITUDE 29.9 NORTH...LONGITUDE 87.8 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 90 KTS...105 MPH...165 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 STEWART

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Hurricane Sally Public Advisory Number 20

2020-09-16 08:41:41| National Hurricane Center (Atlantic)

Issued at 130 AM CDT Wed Sep 16 2020 000 WTNT34 KNHC 160641 TCPAT4 BULLETIN Hurricane Sally Special Advisory Number 20 NWS National Hurricane Center Miami FL AL192020 130 AM CDT Wed Sep 16 2020 ...SALLY CONTINUES TO STRENGTHEN AS HURRICANE CONDITIONS SPREAD ONSHORE THE GULF COAST FROM PENSACOLA BEACH FLORIDA WESTWARD TO DAUPHIN ISLAND ALABAMA... ...HISTORIC LIFE-THREATENING FLOODING LIKELY ALONG PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 130 AM CDT...0630 UTC...INFORMATION ---------------------------------------------- LOCATION...29.9N 87.8W ABOUT 60 MI...95 KM SSE OF MOBILE ALABAMA ABOUT 55 MI...90 KM SW OF PENSACOLA FLORIDA MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 30 DEGREES AT 2 MPH...4 KM/H MINIMUM CENTRAL PRESSURE...968 MB...28.59 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Storm Surge Warning has been discontinued from the Mouth of the Mississippi River to the Mouth of the Pearl River. 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 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 130 AM CDT (0630 UTC), the center of Hurricane Sally was located an Air Force Reserve Hurricane Hunter aircraft and NOAA Doppler weather radars near latitude 29.9 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 later today and tonight, followed by a faster northeastward motion on Thursday. On the forecast track, the center of Sally will approach the northern Gulf Coast this morning, and make landfall in the hurricane warning area later today. Sally is then expected to move inland across southeastern Alabama tonight. Recent data from An Air Force Reserve reconnaissance aircraft and the Mobile Alabama Doppler weather radar indicate that Maximum sustained winds have increased to near 105 mph (165 km/h) with higher gusts. Some further strengthening is possible before Sally makes landfall. Rapid weakening is expected after landfall occurs. 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). A sustained wind of 81 mph (130 km/h) with a gust to 110 mph (178 km/h) was recently reported in Sally's northern eyewall by NOAA buoy 42012, located about 50 miles southeast of Mobile, Alabama. A sustained wind of 72 mph (117 km/h) and a gust to 90 mph (144 km/h) were recently measured by the NOAA C-MAN observing station on Dauphin Island, Alabama. The minimum central pressure recently reported by the Hurricane Hunters was 968 mb (28.58 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 today 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...4-7 ft Pensacola Bay and Choctawhatchee Bay FL...4-7 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 MS/AL Border including Lakes Pontchartrain, Maurepas and Borgne...1-3 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 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 spreading onshore within the hurricane warning area in Florida and Alabama. Tropical storm conditions will continue in portions of the warning areas through tonight. TORNADOES: A few tornadoes may occur through today 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 Stewart

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Hurricane Sally Forecast Advisory Number 20

2020-09-16 08:37:55| National Hurricane Center (Atlantic)

Issued at 0630 UTC WED SEP 16 2020 000 WTNT24 KNHC 160637 TCMAT4 HURRICANE SALLY SPECIAL FORECAST/ADVISORY NUMBER 20 NWS NATIONAL HURRICANE CENTER MIAMI FL AL192020 0630 UTC WED SEP 16 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A STORM SURGE WARNING HAS BEEN DISCONTINUED FROM THE MOUTH OF THE MISSISSIPPI RIVER TO THE MOUTH OF THE PEARL RIVER. 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 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 THE NEXT 6 HOURS. HURRICANE CENTER LOCATED NEAR 29.9N 87.8W AT 16/0630Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 30 DEGREES AT 2 KT ESTIMATED MINIMUM CENTRAL PRESSURE 968 MB EYE DIAMETER 30 NM MAX SUSTAINED WINDS 90 KT WITH GUSTS TO 110 KT. 64 KT....... 35NE 20SE 0SW 25NW. 50 KT....... 70NE 40SE 30SW 50NW. 34 KT.......110NE 110SE 80SW 80NW. 12 FT SEAS..120NE 120SE 90SW 90NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 29.9N 87.8W AT 16/0630Z AT 16/0000Z CENTER WAS LOCATED NEAR 29.6N 88.0W FORECAST VALID 16/1200Z 30.3N 87.5W MAX WIND 95 KT...GUSTS 115 KT. 64 KT... 35NE 20SE 0SW 15NW. 50 KT... 60NE 40SE 20SW 30NW. 34 KT...110NE 110SE 80SW 80NW. FORECAST VALID 17/0000Z 31.2N 86.8W...INLAND MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 80NE 100SE 60SW 60NW. FORECAST VALID 17/1200Z 32.0N 85.7W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 18/0000Z 32.9N 83.9W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 18/1200Z 33.6N 81.5W...INLAND MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 19/0000Z 34.0N 79.0W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 20/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 29.9N 87.8W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 16/0600Z NEXT ADVISORY AT 16/0900Z $$ FORECASTER STEWART

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