Two strong thunderstorms merged north of Orlando, over south central Seminole County and north central Orange County. The resulting storm merger produced a severe thunderstorm with locally damaging winds and marginally severe hail.
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 MLB wrote it up.
Two strong thunderstorms merged north of Orlando, over south central Seminole County and north central Orange County. The resulting storm merger produced a severe thunderstorm with locally damaging winds and marginally severe hail.
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 Melbourne, FL wrote its last area forecast discussion before the first event at Aug 6, 1:55 PM EST, 3 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 255 PM EDT THU AUG 6 2009 .DISCUSSION... TODAY-TONIGHT...UPPER LEVEL TROUGH CONTINUES TO DOMINATE THE EASTERN US WITH A STRONGER SHORTWAVE CONTINUING TO SHARPEN THE BASE OF THE TROUGH AS IT MOVES ACROSS THE FL PANHANDLE. OUTFLOW BOUNDARIES FROM ACTIVITY THIS MORNING OVER SW FL AND THE GULF STREAM INTERACTED WITH THE EAST COAST SEA BREEZE LATE THIS MORNING RESULTING IN AN EARLY ROUND OF SHOWERS AND STORMS OVER THE SOUTHERN COUNTIES.NORTHERN COUNTIES SO FAR HAVE BEEN RELATIVELY QUIET...BUT EXPECTED TO SEE A QUICK INCREASE IN ACTIVITY OVER THE NEXT HOUR AS THE SEA BREEZES INTERACT WITH THE OUTFLOW FROM ACTIVITY FURTHER SOUTH. WITH CONTINUING S-SW STEERING FLOW STORMS WILL GENERALLY TRACK OFF TO THE NNE THROUGH THE AFTERNOON. LATE MORNING SOUNDING ALSO CONTINUE TO INDICATE PWATS CONTINUING JUST UNDER 2 AND TEMPS AT 500 MB AT -7 TO -8C. AS WITH THE PAST FEW DAYS...ISOLD STRONG TO SEVERE STORMS WILL BE POSSIBLE THROUGH THE EVENING WITH THE MAIN FOCUS FOR ACTIVITY SHIFTING OVER THE NORTHERN COUNTIES. FREQUENT LIGHTNING...HAIL...AND STRONG GUSTY WINDS WILL BE THE MAIN CONCERNS. SLOW MOVING STORMS WILL ALSO BRING ROUNDS OF TORRENTIAL RAINFALL. ACTIVITY WILL BEGIN TO DIMINISH AFTER THE LATE EVENING WITH SKIES GRADUALLY BECOMING PARTLY CLOUDY. FRI...SHORTWAVE OVER THE PANHANDLE IS FORECAST TO SHIFT WESTWARD AS FLOW AROUND THE THE MAIN EASTERN US TROUGH BECOMES MORE ZONAL AND THE SUBTROPICAL RIDGE REASSERTS ITSELF. MODELS STILL ARE INDICATING FRIDAY AS THE DAY WHEN THE LOW LVL RIDGE AXIS SCOOTS NORTH OF CENTRAL FLORIDA AND THE EASTERLIES REASSERT THEMSELVES. AS MODELS HAVENT HAD A GREAT HANDLE ON THIS PROGRESSION SO FAR...SO HAVE OPTED FOR LESS AGGRESSIVE SOLUTION THAT KEEPS THE AREA A LITTLE MORE UNDER THE INFLUENCE OF THE TROUGH. STORMS LOOK TO FOCUS MORE TOWARDS THE INTERIOR AND WESTERN PENINSULA FOR TOMORROW AND STEERING FLOW PICKS UP A LITTLE MORE OUT OF THE EAST. WITH PWATS LINGERING PWATS NEAR 2...HAVE KEPT 60 PERCENT POPS OVER THE INTERIOR WITH A DIMINISHING GRADIENT TOWARDS THE COAST WHERE HAVE KEPT 50 PERCENT. SAT-SUN...H5 RIDGE WILL BUILD OVER GA/SC OVER THE WEEKEND WITH A SUBSTANTIAL LOWERING OF PRECIPITABLE WATER VALUES AS AIRMASS DRIES ABOVE H7. DEEP ONSHORE FLOW WILL PROMOTE HIGHEST COVERAGE ABOUT 30 PCT ACROSS THE INTERIOR FOR SATURDAY AFTERNOON. BY SUNDAY...MID LYR RIDGE REMAINS NORTH OF THE STATE WITH GFS INDICATING A RETURN OF SOME MOISTURE FROM THE ATLC. THIS WILL RAISE POPS INTO THE SCATTERED RANGE ALL AREAS...WITH ACTIVITY FAVORED OVER INTERIOR AND SRN SECTIONS. HIGHS NEAR 90 COAST TO LWR 90S FOR THE INTERIOR. MON-THU...PREV DISCUSSION...DLM RIDGE AXIS WILL REMAIN N OF THE CENTRAL FL PENINSULA INTO EARLY NEXT WEEK. THE RESULTING E/SE FLOW WILL CONTINUE TO FAVOR THE W FL PENINSULA FOR DIURNAL PRECIP. BOTH THE GFS/ECMWF MODELS BRING A NEW FRONTAL TROF INTO THE ERN SEABOARD BY THE MIDDLE OF NEXT WEEK. THIS SHOULD SUPPRESS THE BERMUDA RIDGE AXIS BACK INTO THE FL PENINSULA...RESULTING IN WEAKER STEERING FLOW AND INCREASING LOW/MID LVL SUPPRESSION. POPS WILL REMAIN BLO 50% THRU MID WEEK...WHILE OCEAN MODIFIED AIR WILL KEEP MAX TEMPS NEAR CLIMO...MIN TEMPS SLIGHTLY ABV CLIMO. && .AVIATION...ISOLD SHRA/TSRA OVER THE SOUTHERN COUNTIES THROUGH 23Z. SCT-NMRS COVERAGE FROM KMCO-KTIX NORTH THROUGH 01Z. ALL SHRA/TSRA WILL PRODUCE TEMPO MVFR/IFR CONDITIONS WITH POSSIBLE GUSTY WINDS NEAR 35KTS. PREVAILING VFR WITH HIGH CLOUDS AFTER 01Z WITH LOCAL MVFR FOG IN AREAS THAT RECEIVED RAIN THIS MORNING. && .MARINE... TONIGHT-FRI...RIDGE AXIS SHIFTING NORTHWARD WILL RESULT IN INCREASING SE FLOW AROUND 10 KTS. SEAS CONTINUE AT 2 TO 3 FT. WEAK WESTERLY STEERING FLOW MAY BE ABLE TO PUSH STORMS OFFSHORE MAINLY ALONG THE VOLUSIA/N BREVARD COUNTY COASTS LATE THIS AFTERNOON/EVENING. SAT-TUE..SE FLOW OVER THE WEEKEND WILL VEER TO SOUTHERLY BY MID WEEK. SAT LOOKS TO BE A GOOD BOATING DAY WITH LITTLE IF ANY CONVECTIVE ACTIVITY OVER THE ATLC. && .PRELIMINARY POINT TEMPS/POPS... DAB 74 89 75 90 / 40 50 10 20 MCO 74 92 75 92 / 30 60 10 30 MLB 74 89 76 89 / 30 50 10 20 VRB 74 90 77 90 / 30 50 10 20 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. && SHORT TERM...MOSES LONG TERM....VOLKMER AVIATION...VAN DYKE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 506 AM EDT THU AUG 6 2009 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-062100- COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE OUT 20 NM- COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET OUT 20 NM- COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM- WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO 60 NM OFFSHORE- WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO 60 NM OFFSHORE- WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE- INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD- OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA- SOUTHERN LAKE-NORTHERN BREVARD- 506 AM EDT THU AUG 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... NUMEROUS LIGHTNING STORMS ARE EXPECTED THIS AFTERNOON ACROSS EAST CENTRAL FLORIDA. STORMS WILL DEVELOP ALONG THE EAST COAST SEA BREEZE BOUNDARY EARLY THIS AFTERNOON ALONG THE SPACE AND TREASURE COAST. ADDITIONAL STORMS ASSOCIATED WITH THE WEST COAST SEA BREEZE BOUNDARY WILL MOVE EAST ACROSS LAKE COUNTY AND THE INTERSTATE FOUR CORRIDOR EARLY THIS AFTERNOON. HIGHEST STORM COVERAGE WILL OCCUR AROUND MID-AFTERNOON OVER METRO ORLANDO TO DAYTONA BEACH AND AREAS SOUTH TO LAKE OKEECHOBEE WHILE DRIFTING EAST TO SOUTHEAST TOWARD THE EAST COAST AT 5 TO 10 MPH. THE PRESENCE OF COOLER AIR ALOFT WILL ALLOW FOR A FEW STORMS TO PRODUCE COIN SIZE HAIL ALONG WITH DAMAGING WIND GUSTS AND FREQUENT CLOUD TO GROUND LIGHTNING. ...FLOOD IMPACT... INTERACTION OF BOUNDARIES AND THE DEVELOPMENT OF SLOW MOVING STORMS WILL PRODUCE SOME LOCALLY HEAVY RAINFALL AMOUNTS UP TO 2 TO 3 INCHES. RAPID ACCUMULATION OF RAINFALL CAN PRODUCE MINOR FLOODING OF URBAN...LOW LYING...AND POOR DRAINAGE AREAS. ...MARINE THUNDERSTORM GUST IMPACT... WESTERLY STEERING FLOW WILL PRODUCE A MODERATE THREAT FOR OFFSHORE MOVING THUNDERSTORMS...MAINLY ALONG THE VOLUSIA AND NORTH BREVARD COUNTY COASTLINE. FREQUENT CLOUD TO WATER LIGHTNING STRIKES AND WIND GUSTS TO AROUND 35 KNOTS WILL BE POSSIBLE WITHIN THE STRONGEST STORMS AS THEY MOVE EAST TO SOUTHEAST OVER COASTAL AREAS. INLAND LAKES WILL ALSO HAVE A LOW THREAT OF STORMS PRODUCING WIND GUSTS NEAR 35 KNOTS ALONG WITH DEADLY LIGHTNING DURING THE AFTERNOON. ...WATERSPOUT IMPACT... A BRIEF FUNNEL CLOUD OR WATERSPOUT WILL BE POSSIBLE AT THE COAST AND INTRACOASTAL WATERS MAINLY LATE THIS MORNING AND EARLY AFTERNOON IN DEVELOPING STORMS. CONDITIONS FOR THIS ARE HISTORICALLY HIGHER OVER THE INTRACOASTAL WATERS AND MERRITT ISLAND AS THE EAST COAST SEA BREEZE BOUNDARY MOVES INLAND OR REMAINS STATIONARY ALONG THE COAST. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THE SUBTROPICAL HIGH PRESSURE RIDGE AXIS IS EXPECTED TO MOVE NORTH OF THE AREA BY THE WEEKEND. SCATTERED STORMS WILL DEVELOP EACH AFTERNOON WITH GREATEST CHANCES OCCURRING INLAND AWAY FROM THE IMMEDIATE COAST. THE THREAT OF RIP CURRENTS WILL INCREASE THIS WEEKEND INTO EARLY NEXT WEEK DUE TO THE DEVELOPMENT OF ONSHORE FLOW. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. PENDERGRAST
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 1245 PM EDT THU AUG 6 2009 FLZ054-059-061715- INDIAN RIVER-ST. LUCIE- 1245 PM EDT THU AUG 6 2009 ...STRONG THUNDERSTORMS AFFECTING SOUTHEASTERN INDIAN RIVER COUNTY... NORTHEAST ST. LUCIE COUNTY... AT 1242 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG STORM 5 MILES WEST OF FORT PIERCE. THE STORM WAS MOVING NORTH AT 15 MPH. THIS STORM WILL AFFECT... FORT PIERCE...LAKEWOOD PARK...VERO BEACH HIGHLANDS...AND VERO BEACH SOUTH THE PRIMARY THREAT WILL BE FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS TO 35 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. VERY HEAVY RAINFALL AMOUNTS UP TO 2 TO 3 INCHES CAN BE EXPECTED ...CAUSING TEMPORARY PONDING ON SOME ROADS AND MINOR FLOODING OF POOR DRAINAGE AREAS. MOTORISTS SHOULD SLOW DOWN IN HEAVY RAINFALL TO REDUCE THE RISK OF HYDROPLANING AND LEAVE SAFE DISTANCE BETWEEN OTHER VEHICLES. 15
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 353 PM EDT THU AUG 6 2009 FLZ141-147-062030- COASTAL VOLUSIA COUNTY-NORTHERN BREVARD COUNTY- 353 PM EDT THU AUG 6 2009 ...STRONG THUNDERSTORMS AFFECTING EXTREME NORTHWESTERN BREVARD COUNTY...SOUTHEASTERN VOLUSIA COUNTY... AT 350 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG STORM OVER MAYTOWN...MOVING EAST-NORTHEAST AT 10 MPH. OAK HILL IS IN THE STORMS PATH AND THIS STORM MAY DEVELOP SOUTHWARD AND MOVE OVER OR VERY NEAR SCOTTSMOOR. THE PRIMARY THREAT WILL BE FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 40 TO 45 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. TORRENTIAL RAINFALL CAN BE EXPECTED...CAUSING TEMPORARY PONDING ON SOME ROADS AND MINOR FLOODING OF POOR DRAINAGE AREAS. MOTORISTS SHOULD SLOW DOWN IN HEAVY RAINFALL TO REDUCE THE RISK OF HYDROPLANING AND LEAVE SAFE DISTANCE BETWEEN OTHER VEHICLES. SEDLOCK
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 438 PM EDT THU AUG 6 2009 FLZ041-044-045-144-062115- INLAND VOLUSIA COUNTY-NORTHERN LAKE COUNTY-ORANGE-SOUTHERN LAKE COUNTY- 438 PM EDT THU AUG 6 2009 ...STRONG THUNDERSTORMS AFFECTING LAKE AND NORTHWESTERN ORANGE COUNTIES... AT 434 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A DEVELOPING LINE OF STRONG STORMS FROM CASSIA TO 10 MILES SOUTHWEST OF MASCOTTE...MOVING NORTH AT 10 MPH. THE MOST INTENSE STORMS IN THIS LINE WERE NEAR ASTATULA...LITTLE LAKE HARRIS...TANGERINE...AND SOUTHWEST OF MASCOTTE. ADDITIONAL STORMS ARE LIKELY TO FORM ACROSS CENTRAL AND NORTHERN LAKE COUNTY...WESTERN AND NORTHERN VOLUSIA COUNTY...AND EXTREME NORTHWEST ORANGE COUNTY. THE PRIMARY THREATS WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 40 TO 45 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE POSSIBLE IN LOCALIZED AREAS. CRISTALDI
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 538 PM EDT THU AUG 6 2009 FLZ044-045-144-062215- NORTHERN LAKE COUNTY-ORANGE-SOUTHERN LAKE COUNTY- 538 PM EDT THU AUG 6 2009 ...STRONG THUNDERSTORMS AFFECTING CENTRAL LAKE COUNTY...WESTERN ORANGE COUNTY... AT 537 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG STORMS FROM SOUTH OF KILLARNEY TO APOPKA AND FERNDALE. LOCATIONS IN THE PATH OF THESE STRONG STORMS INCLUDE BAY HILL... CLERMONT...ORLOVISTA AND WEKIWA SPRINGS STATE PARK. THE PRIMARY THREATS WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 40 TO 45 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE POSSIBLE IN LOCALIZED AREAS. CRISTALDI
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 541 PM EDT THU AUG 6 2009 FLZ046-062230- SEMINOLE- 541 PM EDT THU AUG 6 2009 ...STRONG THUNDERSTORMS AFFECTING WESTERN SEMINOLE COUNTY... AT 539 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG STORMS FROM JUST WEST OF SANFORD TO WEKIVA SPRINGS... MOVING NORTHEAST AT 10 MPH TOWARD LONGWOOD...LAKE MARY AND SANFORD. THE PRIMARY THREATS WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 40 TO 45 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE POSSIBLE IN LOCALIZED AREAS. CRISTALDI
The Melbourne radar (KMLB), 94 km away, was scanning. The volume nearest the first event began at 22:05 UTC.
1 hail, 1 thunderstorm wind. Local standard time, as filed.
Local media relayed a public report of penny sized hail at the intersection of State Road 434 and County Road 427.
Thunderstorm wind gusts downed a tree onto a home in Winter Park. Powerlines were also downed by winds on a street nearby.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2009Every state in 2009This day in weather historyWarnings in Florida, August 2009
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: 178984, 178978.