Afternoon thunderstorms developed with lightning striking a home in Grayton Beach.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS TAE wrote it up.
Afternoon thunderstorms developed with lightning striking a home in Grayton Beach.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tallahassee, FL wrote its last area forecast discussion before the first event at Aug 22, 1:15 PM CST, 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TALLAHASSEE FL 315 PM EDT SUN AUG 22 2010 .SYNOPSIS... 19Z WATER VAPOR AND H4 RUC ANALYSIS SHOWS AN AMPLIFIED UPPER LEVEL PATTERN HAS NOW DEVELOPED ACROSS NORTH AMERICA. NORTHERN STREAM FLOW CONSISTS OF DEEP TROUGHING ALONG THE PACIFIC COAST...FOLLOWED DOWNSTREAM BY BROAD RIDGING INTO THE HIGH PLAINS...AND THEN ANOTHER SIGNIFICANT TROUGH OVER THE NORTHEASTERN STATES. A NARROW EXTENSION OF THIS TROUGH EXTENDS DOWN INTO THE CAROLINAS AND GEORGIA. IN THE WAKE OF THIS EASTERN TROUGH...WV IMAGERY SHOWS AN EXPANSE OF EXTREMELY DRY MID/UPPER LEVEL AIR FROM THE MID-SECTION OF THE COUNTRY EASTWARD TO THE TN AND OH VALLEYS. SOME OF THIS DRIER AIR WILL BE MAKING A RUN AT OUR FORECAST AREA...AND HOPEFULLY QUIET DOWN MUCH OF THE DIURNAL SHOWER AND STORM ACTIVITY FOR THE FIRST PART OF THE WEEK. AT THE SURFACE...FORECAST AREA REMAINS IN A WEAK NORTHWEST FLOW BETWEEN HIGH PRESSURE OVER THE CENTRAL GULF OF MEXICO...AND A WEAK TROUGH FROM THE CAROLINA/GEORGIA COASTS. ALSO...A SUBTLE FRONTAL BOUNDARY WAS LOCATED OVER CENTRAL AL AND GA. THIS FEATURE IS ASSOCIATED WITH THE PASSING SHORTWAVE ENERGY ALOFT...AND WILL BE MAKING SOME PROGRESS SOUTHWARD INTO THE OVERNIGHT. TOOK SOME TIME TO GET CONVECTION GOING...HOWEVER RADARS ARE NOW SHOWING PLENTY OF SCATTERED SHOWERS/STORMS ACROSS THE REGION. THESE STORM WILL DRIFT SOUTHWARD INTO THE EVENING HOURS. && .SHORT TERM (TONIGHT THROUGH TUESDAY NIGHT)... TONIGHT INTO MONDAY...TROUGH OVER THE NORTHEASTERN STATES WILL PHASE WITH ADDITIONAL ENERGY MOVING THROUGH ONTARIO...AND CLOSE OFF OVER NEW YORK AND PENNSYLVANIA. GLOBAL GUIDANCE IN AGREEMENT WITH THIS CLOSED LOW THEN DRIFTING SOUTHWARD ALONG THE ATLANTIC SEA-BOARD THROUGH MONDAY. DEEP NORTHERLY FLOW ON THE WESTERN PERIPHERY OF THE LOW WILL DRAG SOME OF THE DRIER AIR OVER THE TN VALLEY SOUTHWARD OVER A GOOD PORTION OF THE FORECAST AREA...ESPECIALLY OUR WESTERN AND NORTHERN ZONES. AT THE VERY LEAST...THIS DRIER AIR WILL HELP SUPPRESS SIGNIFICANT CONVECTION OVER THESE NORTHERN AND WESTERN ZONES FOR MONDAY AND TUESDAY. ZONES FURTHER SOUTH AND EAST... ESPECIALLY SOUTH OF TALLAHASSEE/VALDOSTA MAY NOT EXPERIENCE THE BRUNT OF THE DRIER AIR...HOWEVER AT LEAST SOME REDUCTION IN CONVECTIVE COVERAGE IS EXPECTED BY TUESDAY. FOR MONDAY...DRIER AIR ALOFT IS FORECAST TO ARRIVE ACROSS SOUTHEAST ALABAMA...SOUTHWEST GEORGIA...AND THE FLORIDA PANHANDLE. FURTHER SOUTH AND EAST TOWARD THE I-75 CORRIDOR...AND THE EASTERN BIG BEND...THE DEEP LAYER MOISTURE WILL BE MORE STUBBORN TO BE REMOVED. AT THE SURFACE...OLD FRONTAL BOUNDARY/TROUGH WILL LAY OUT JUST NORTH OF THE I-10 CORRIDOR. WILL START THE DAY OFF WITH A SCATTERING OF SHOWERS/STORMS OVER THE MARINE AREA AND MAINLY DRY CONDITIONS FOR OUR LAND ZONES. UNLIKE PREVIOUS DAYS...THE DRY MID-LEVELS WILL KEEP CONVECTION ON THE SUPPRESSED SIDE OVER OUR WESTERN AND NORTHERN ZONES WHERE CURRENT GRIDS SHOW ONLY A SLIGHT CHANCE (15-25%) OF AN AFTERNOON SHOWER. ALONG THE I-75 CORRIDOR AND DOWN INTO THE EASTERN BIG BEND...THE DEEPER MOISTURE WILL ALLOW A BETTER COVERAGE OF STORMS WITH POPS IN THE 30-50% RANGE. THESE AREAS WITH BETTER SHOWER COVERAGE WILL SEE HIGH TEMPS INTO THE LOWER AND MIDDLE 90S...HOWEVER FURTHER NORTH AND WEST...THE LACK OF SHOWERS AND CLOUDS WILL ALLOW TEMPS TO REACH THE UPPER 90S. HEAT INDICES WILL BE WIDESPREAD BETWEEN 105 AND 108 DEGREES. TUESDAY...ECMWF/GFS BOTH SHOW THE DRY AIR FIRMLY IN PLACE ACROSS THE WESTERN HALF OF THE FORECAST AREA...AND MAKING SOME BETTER PROGRESS TOWARD THE SUWANNEE RIVER VALLEY. WILL KEEP POPS WELL BELOW CLIMO OVER THE WEST (10-20%) AND THEN SLOWLY INCREASE THE RAIN CHANCES TO 35-40% OVER OUR FAR SOUTHEASTERN AREAS (PERRY/MAYO/CROSS CITY). ONCE AGAIN TEMPERATURES WILL REACH THE MID/UPPER 90S OVER A WIDE SWATH OF THE AREA. && .LONG TERM (WEDNESDAY THOUGH NEXT WEEKEND)... THE LARGE SCALE LONG TERM PERIOD BEGINS IN THE AMPLIFIED NRN STREAM WITH RIDGING FROM PAC NW EWD TO CNTRL PLAINS...TROUGH OVER NRN GREAT LAKES AND ANOTHER TROUGH DIGGING SWD FROM NY ESE TO ALONG ATLC COAST OF GA WITH 577DM LOW OVER DE FOLLOWED BY AMPLIFIED RIDGE OVER WRN ATLC. SRN STREAM SHOWS RIDGING FROM HIGH NV/UT BORDER SEWD TO VCNTY APALACHICOLA. LOOKING SWD...587DM LOW OVER WRN GULF. ALL THIS LEAVES MUCH OF CWA IN WEAKNESS TO EAST OF RIDGE AND S OF ERN TROUGH. HOWEVER THE PATTERN QUICKLY CHANGES. ERN UPPER LOW IS FORECAST TO WEAKEN INTO AN OPEN WAVE ON WED AND LIFT TO THE NORTHEAST BEING ABSORBED BY UPSTREAM TROUGH BY THURS. LATEST MODELS MUCH MORE AGGRESSIVE IN DRYING OUT LOCAL ATMOSPHERE. BY FRI...TROUGH NOW OFFSHORE ALLOWING UPSTREAM RIDGE TO SPREAD ESE (WITH NWLY STEERING FLOW) AND BUILD DOWN EAST COAST AND INTO CARIB AS DRIER AIR WORKS IN FROM NW-SE. AND...FORMER WRN GULF LOW PROGGED TO LIFT NEWD ALONG GULF COAST PROVIDING ADDITIONAL SOURCE OF MOISTURE APPEARS ONLY BEGINS TO IMPACT SRN CWA ON SAT. AT SURFACE...PERIOD BEGINS WITH CLOSED LOW IN WRN ATLC JUST OFF N ENGLAND WITH TRAILING FRONTAL BOUNDARY SWWD INTO CNTRL AL/GA. PRE-FRONTAL TROUGH EXTENDING FROM FRONT SWWD ACROSS MARINE AREA. INITIAL POSITION OF UPPER TROUGH ALLOWS FRONT TO DROP SWD IN NRN GULF WATERS ON WED. THEN AS UPPER TROUGH AND THEN CLOSED LOW LIFTS NEWD...FRONT STALLS OVER WATERS WITH DRIER AIR FILTERING SWD IN ITS WAKE. THIS DIFFERENT FROM 24HRS AGO...MODELS FORMALLY HINTED AT DEVELOPING TROPICAL WAVE FORMING ALONG REMNANTS OF COLD FRONT/SHEAR ZONE IN WRN GULF AND MOVING NEWD ADVECTING MOISTURE BACK TOWARDS LOCAL AREA. LATEST GFS AND NAM NOW SHOW WAVE REMAINING WEST OF CWA WITH SUPPRESSED PATTERN OVER CWA. IF WAVE MOVES NEWD INTO CWA...IT WONT BE UNTIL SAT OR BEYOND. SO WITH MID-UPPER RIDGE DOMINANT...THEN A TRANSITION INTO A NLY STEERING FLOW WITH SHALLOW SEA BREEZE FOCUSED ALONG FL COAST. OF COURSE THIS PATTERN IMPLIES INCREASING TEMPS AND BELOW NORMAL POPS...WITH RAIN STARTING AND ENDING LATER INTO NIGHT AND INCREASED CHANCE FOR SEVERE STORMS. WITH A NOTICEABLY DRIER PATTERN THAN PREV RUN...PREVIOUS POPS WILL BE LOWERED AND TEMPS INCREASED. NOW WDLY SCT TO LOW SCT DAYTIME POPS UNTIL SAT AFTN...THEN SCT POPS. WITH ABSENCE OF FRONTAL CLOUDS... MINIMUM TEMPS WILL NOW DROP TO AT OR SLIGHTLY ABOVE CLIMO (INLAND CLIMO AROUND 69). CONVERSELY...HIGHS WILL RISE TO WELL ABOVE CLIMO (CLIMO IS 90 DEGREES). EXPECT MID 90S INLAND WED THRU FRI DROPPING TO LOW 90S ON SAT. HIGHEST HEAT INDICES WILL RISE INTO THE 103 TO 106 DEGREE RANGE WED AND THURS LOWERING TO AROUND 100 DEGREES FRI AND SAT. && .MARINE... THE FORECAST WATERS WILL LIE BETWEEN A STALLED FRONTAL BOUNDARY TO THE NORTH AND THE SUBTROPICAL RIDGE AXIS TO THE SOUTH THROUGH THE NEXT SEVERAL DAYS. THE NEARBY FRONTAL BOUNDARY WILL KEEP SCATTERED TO NUMEROUS SHOWERS AND STORMS IN THE FORECAST. && .AVIATION... AS WAS MENTIONED ON THE EARLIER DISCUSSION...FOR THE REMAINDER OF THE AFTERNOON AND EVENING HOURS TODAY...THE TIMING OF THE SCATTERED SHOWERS AND THUNDERSTORMS WILL BE THE GREATEST CONCERN AT THE TERMINALS. ALTHOUGH THE OVERALL COVERAGE OF THE SHOWERS AND STORMS IS NOT EXPECTED TO BE AS NUMEROUS AS WAS EARLIER THOUGHT... SOME OF THE STORMS THAT DO DEVELOP COULD BE FAIRLY STRONG WITH GUSTY WINDS. WITH RESPECT TO TIMING...MADE SOME MINOR CHANGES FROM THIS MORNING'S PACKAGE MAINLY TO DELAY THE ONSET OF THE CONVECTION AT MOST OF THE TERMINALS BY 1 TO 3 HRS IN MOST CASES. FOR THE OVERNIGHT PERIOD... DECIDED TO USE A BLEND OF GUIDANCE AND PERSISTENCE...WHICH BRINGS MOST OF THE TERMINALS DOWN TO A PERIOD OF MVFR CONDITIONS...EXCEPT FOR ECP (WHICH WILL REMAIN AT VFR FOR THE TIME BEING)...AND VLD (WHICH WILL HAVE A PERIOD OF PREVAILING MVFR WITH A TEMPO FOR IFR/LIFR CIGS). && .FIRE WEATHER... CONFIDENCE CONTINUES TO INCREASE THAT THE COLD FRONT TO THE NORTH WILL PASS CLEANLY THROUGH THE TRI-STATE AREA ON MONDAY WHICH WILL ALLOW SIGNIFICANTLY DRIER AIR TO MOVE INTO THE REGION ON TUESDAY. ALTHOUGH NO RED FLAG CONDITIONS ARE EXPECTED AT THIS TIME... AFTERNOON RELATIVE HUMIDITIES MAY BRIEFLY DROP INTO THE MID TO UPPER 30S ACROSS WELL INLAND AREAS OF THE FLORIDA PANHANDLE. && .PRELIMINARY POINT TEMPS/POPS... TALLAHASSEE 75 97 76 96 75 / 30 40 20 30 10 PANAMA CITY 79 94 78 94 77 / 30 20 10 20 10 DOTHAN 75 98 73 97 72 / 30 10 10 10 10 ALBANY 76 97 74 97 73 / 30 20 10 10 10 VALDOSTA 75 95 75 94 73 / 40 40 30 40 10 CROSS CITY 76 93 74 92 75 / 40 50 30 40 10 APALACHICOLA 77 93 78 93 78 / 30 30 20 20 10 && .TAE WATCHES/WARNINGS/ADVISORIES... AL...NONE. GA...NONE. FL...NONE. GM...NONE. && MROCZKA/GOULD/BLOCK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TALLAHASSEE FL 559 AM EDT SUN AUG 22 2010 ALZ065>069-FLZ007>019-026>029-034-108-112-114-115-118-127-128-134- GAZ120>131-142>148-155>161-GMZ730-750-755-765-770-775-230200- COFFEE-DALE-HENRY-GENEVA-HOUSTON-INLAND WALTON-CENTRAL WALTON- HOLMES-WASHINGTON-JACKSON-INLAND BAY-CALHOUN-INLAND GULF- INLAND FRANKLIN-GADSDEN-LEON-INLAND JEFFERSON-MADISON-LIBERTY- INLAND WAKULLA-INLAND TAYLOR-LAFAYETTE-INLAND DIXIE-SOUTH WALTON- COASTAL BAY-COASTAL GULF-COASTAL FRANKLIN-COASTAL JEFFERSON- COASTAL WAKULLA-COASTAL TAYLOR-COASTAL DIXIE-QUITMAN-CLAY- RANDOLPH-TERRELL-DOUGHERTY-LEE-WORTH-TURNER-TIFT-BEN HILL-IRWIN- EARLY-MILLER-BAKER-MITCHELL-COLQUITT-COOK-BERRIEN-SEMINOLE- DECATUR-GRADY-THOMAS-BROOKS-LOWNDES-LANIER- APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE RIVER FL OUT TO 20 NM- COASTAL WATERS FROM APALACHICOLA TO DESTIN FL OUT 20 NM- COASTAL WATERS FROM OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO 20 NM- COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM- WATERS FROM APALACHICOLA TO DESTIN FL FROM 20 TO 60 NM- WATERS FROM SUWANNEE RIVER TO APALACHICOLA FL FROM 20 TO 60 NM- 559 AM EDT SUN AUG 22 2010 /459 AM CDT SUN AUG 22 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ALABAMA... SOUTHWEST AND SOUTH CENTRAL GEORGIA...AND THE FLORIDA BIG BEND AND PANHANDLE...AND ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS CAN BE EXPECTED TODAY AND LINGER INTO THE EARLY EVENING HOURS. A FEW STORMS MAY BE STRONG OR BRIEFLY SEVERE BUT NO ORGANIZED SEVERE WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... RAIN CHANCES WILL RETURN TO NEAR OR BELOW SEASONAL LEVELS THIS WEEK AS THE DEEP LAYER MOISTURE THAT HAS RESIDED OVER THE AREA IS REPLACED WITH A MUCH DRIER AIRMASS. HOWEVER...WITH THE DRIER AIR AND DIMINISHED RAIN CHANCES...AFTERNOON TEMPERATURES WILL BE PUSHING INTO THE UPPER 90S AT SOME INLAND LOCATIONS. FORTUNATELY THE LATEST COMPUTED HEAT INDICES ARE NOT EXPECTED TO REACH ADVISORY LEVELS BUT THIS WILL HAVE TO BE MONITORED. MOST AREAS WILL SEE HEAT INDICES IN THE 102 TO 107 DEGREE RANGE FOR THE UPCOMING WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE WEBSITE ON THE INTERNET AT WEATHER.GOV...THEN CLICK ON YOUR AREA OF INTEREST ON THE NATIONAL MAP. BARRY
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 336 PM EDT SUN AUG 22 2010 FLZ108-222000- SOUTH WALTON- 236 PM CDT SUN AUG 22 2010 ...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR SOUTHERN WALTON COUNTY IN THE FLORIDA PANHANDLE... * UNTIL 300 PM CDT AT 234 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR SANTA ROSA BEACH...MOVING SOUTH AT 10 MPH. PEOPLE IN SOUTHERN WALTON COUNTY...INCLUDING THE CITY OF SANTA ROSA BEACH...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. WINDS UP TO 40 TO 50 MPH ARE EXPECTED WITH THIS STORM. THIS STORM IS CAPABLE OF PRODUCING TORRENTIAL DOWNPOURS WHICH MAY CAUSE LOCALIZED FLOODING OF STREETS AND LOW LYING AREAS...AND IS ALSO PRODUCING NEARLY CONTINUOUS CLOUD TO GROUND LIGHTNING. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. RELAY REPORTS OF SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE IN TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. 17-GOULD
The Eglin Afb radar (KEVX), 35 km away, was scanning. The volume nearest the first event began at 19:48 UTC.
1 lightning. Local standard time, as filed.
A home along Garfield Street in Grayton Beach was struck by lightning, which caused a small fire in the attic above a rear bedroom. Firefighters were able to extinguish the fire quickly and keep damage to a relative minimum. The monetary damage figure provided is a rough estimate.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2010Every state in 2010This day in weather historyWarnings in Florida, August 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 258519.