Sea breeze boundaries collided over Southwest Florida to produce sea breeze thunderstorms. One of these storms developed a quick down burst wind gust in Lee county.
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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 TBW wrote it up.
Sea breeze boundaries collided over Southwest Florida to produce sea breeze thunderstorms. One of these storms developed a quick down burst wind gust in Lee county.
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 Tampa Bay, FL wrote its last area forecast discussion before the first event at Aug 2, 2:02 PM EST, 0 minutes earlier.
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 302 PM EDT FRI AUG 2 2013 .SYNOPSIS... ALOFT - A BROAD LOW WAS ACROSS THE PACIFIC NORTHWEST AND THE SOUTHERN CANADIAN/NORTHERN U.S. ROCKIES...A RIDGE CENTERED IN TX EXTENDED TO THE NORTHERN PLAINS...A LOW OVER HUDSON BAY SPRAWLED DOWN TO THE SOUTHEASTERN STATES...AND A WEAK TROUGH WAS OVER THE BAHAMAS. SURFACE - A FRONT REACHED FROM THE NORTHERN HIGH PLAINS TO THE GREAT LAKES...HIGH PRESSURE WAS CENTERED IN THE OHIO VALLEY...A DECAYING FRONTAL BOUNDARY/TROUGH STRETCHED FROM THE SOUTHEAST U.S. TO NEW ENGLAND...HIGH PRESSURE ALONG 30 NORTH LATITUDE RIDGED ALONG OVER NORTHERN FL TO THE NE GULF...A WEAK TROUGH WAS BETWEEN SOUTHEAST FL AND THE BAHAMAS. && .SHORT TERM (TONIGHT THROUGH SUNDAY)... THIS AFTERNOON AND EVENING...CURRENT THINKING IT THE ISOLATED STORMS FORMING RIGHT ON THE COAST PUSHES INLAND...INCREASES IN COVERAGE...THEN COMES BACK TOWARD THE WEST COAST WHEN THE EAST COAST SEA BREEZE MOVES IN. AM COMFORTABLE WITH THE CURRENT FORECAST. THE TROUGHING OFF THE FL EAST COAST TRACKS NORTHWARD TONIGHT THEN NORTHEAST SAT-SUN...WEAKENING AND MERGING INTO THE TROUGHS TO THE NORTH. THE TX UPPER RIDGE BUILDS EAST TO THE GULF SAT THEN FL SUN AS THE ATLANTIC HIGH PRESSURE BECOMES RE-ESTABLISHED ACROSS SOUTH FL SAT THEN LIFTS NORTH SUN...TO SOUTH-CENTRAL FL. AS THE TROUGHING LIFTS AWAY AND RIDGING BUILDS IN FORECAST PWAT VALUES GO FROM AROUND 2 INCHES DOWN TO 1.7-1.8 INCHES. THIS IS SUFFICIENT FOR ISOLATED-SCATTERED STORMS. WITH SOUTHWEST TO WEST FLOW THE ISOLATED COVERAGE IS EXPECTED ON THE GULF IN MORNINGS AND DRIFTING ONSHORE. THE SW-W FLOW WILL BE ENHANCED BY AFTERNOON SEA BREEZES...RESULTING THE HIGHEST COVERAGE INLAND AND LATER IN THE AFTERNOONS ALONG THE WEST COAST/EAST COAST SEA BREEZE BOUNDARY. AGREE WITH THE PREVIOUS SHIFT ABOUT THE GFS/MAV GUIDANCE AND HAVE ADJUSTED POPS UP...BUT NOT AS HIGH AS THE NAM/MET. THE FORECAST HAS ISOLATED MORNINGS AND EVENINGS POPS WITH LOW TO MID SCATTERED VALUES IN THE AFTERNOONS. && .LONG TERM (SUNDAY NIGHT-FRIDAY)... A SURFACE SUBTROPICAL ATLANTIC RIDGE OF HIGH PRESSURE PERSISTS INTO THE LONG TERM FORECAST PERIOD. AN UPPER LEVEL TROUGH WILL SIT OVER THE EASTERN UNITED STATES AS WELL FOR THE FORESEEABLE FUTURE. THIS SYNOPTIC SETUP WILL KEEP WEST CENTRAL AND SOUTHWEST FLORIDA MOIST. DIURNAL CONVECTION WILL CONTINUE TO BE DRIVEN BY THE SEA BREEZES. USED MEX AND MOSGUIDE BLEND...WITH SOME CLIMO TRENDS...FOR THE TEMPERATURE AND POP FORECASTS. && .AVIATION... LOOKING FOR TWO ROUNDS OF STORMS THIS AFTERNOON AND EVENING. THE FIRST WILL BE 18-21Z AS THE GULF COAST SEA BREEZE MOVES INLAND WITH VCSH/VCTS AT COASTAL TERMINALS. SECOND ROUND 23-01Z AS ATLANTIC COAST SEA BREEZE MOVES IN FROM THE EAST. WILL KEEP VCTS FOR NOW DUE TO EXPECTED SCT COVERAGE. EXPECT LCL MVFR CIGS AND IFR VSBYS IF STORMS HIT TERMINALS. && .MARINE... A WEST FLOW PATTERN FOR THE WEEKEND AS A RIDGE OF HIGH PRESSURE BUILDS SOUTH OF THE WATERS THEN LIFTS NORTH. THE RIDGE LINGERS WEST TO EAST...ACROSS THE CENTRAL WATERS FOR THE EARLY PART OF NEXT WEEK BEFORE SAGGING BACK SOUTH MIDWEEK...WITH A FLOW PATTERN MORE SOUTHEASTERLY BUT WITH AFTERNOON SEA BREEZES. WINDS SPEEDS WILL BE BELOW 15 KNOTS. THE MAIN MARINE CONCERN WILL BE SHOWERS AND THUNDERSTORMS WITH POSSIBLY HIGHER WINDS AND WAVES. && .FIRE WEATHER... MINIMUM RH ABOVE CRITICAL LEVELS AND LIGHT WINDS PRECLUDE ANY FIRE WEATHER CONCERNS THROUGH THE FORECAST PERIOD. && .PRELIMINARY POINT TEMPS/POPS... TPA 77 90 78 91 / 20 40 10 30 FMY 75 92 75 92 / 30 40 20 40 GIF 75 93 74 93 / 30 40 20 40 SRQ 76 91 76 91 / 30 40 10 40 BKV 71 92 72 93 / 20 40 10 30 SPG 79 90 79 89 / 20 40 10 40 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && SYNOPSIS/SHORT TERM/MARINE/FIRE WEATHER...09/RUDE LONG TERM...GARCIA AVIATION...72/NOAH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 513 AM EDT FRI AUG 2 2013 FLZ039-042-043-048>052-055>057-060>062-065-GMZ830-850-853-856-870- 873-876-031000- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DESOTO-CHARLOTTE-LEE- TAMPA BAY WATERS-TARPON SPRINGS TO SUWANNEE RIVER OUT 20 NM- ENGLEWOOD TO TARPON SPRINGS OUT 20 NM- BONITA BEACH TO ENGLEWOOD OUT 20 NM- TARPON SPRINGS TO SUWANNEE RIVER OUT 20 TO 60 NM- ENGLEWOOD TO TARPON SPRINGS OUT 20 TO 60 NM- BONITA BEACH TO ENGLEWOOD OUT 20 TO 60 NM- 513 AM EDT FRI AUG 2 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE AS THE EAST AND WEST COAST SEA BREEZES COLLIDE LATE THIS AFTERNOON. THE MAIN HAZARDS ARE EXPECTED TO BE STRAIGHT LINE DAMAGING WINDS...FREQUENT LIGHTNING...AND LOCALLY HEAVY RAINFALL. FUNNEL CLOUDS AND BRIEF WATERSPOUTS ARE POSSIBLE THIS AFTERNOON AND EVENING AROUND BOUNDARY COLLISIONS. ...RIVER FLOOD IMPACT... MINOR FLOODING CONTINUES ON THE MYAKKA RIVER AT MYAKKA RIVER STATE PARK. SEE THE LATEST FLOOD STATEMENT FOR ADDITIONAL DETAILS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. ...THUNDERSTORM IMPACT... SCATTERED MAINLY AFTERNOON AND EARLY EVENING THUNDERSTORMS ARE EXPECTED EACH DAY WITH THE STRONGER STORMS CAPABLE OF PRODUCING WINDS OF 40 TO 50 MPH...LOCALLY HEAVY RAIN...AND FREQUENT CLOUD TO GROUND LIGHTNING. AN ISOLATED SEVERE THUNDERSTORM IS ALSO POSSIBLE DURING THE AFTERNOON AND EARLY EVENING HOURS. ...RIVER FLOOD IMPACT... RIVER FLOODING WILL LIKELY CONTINUE THROUGH THE WEEKEND ON THE MYAKKA RIVER AT MYAKKA RIVER STATE PARK. SEE THE LATEST FLOOD STATEMENT FOR ADDITIONAL DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. GARCIA
The Tampa radar (KTBW), 144 km away, was scanning. The volume nearest the first event began at 19:03 UTC.
1 thunderstorm wind. Local standard time, as filed.
The ASOS at the Regional Southwest International Airport in Fort Myers measured a 50 knot (58 MPH) thunderstorm wind gust.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2013Every state in 2013This day in weather historyWarnings in Florida, August 2013
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: 468841.