A mid level trough of low pressure moved into northern Florida, helping to intensify early afternoon thunderstorms. One of these storms produced minor wind gusts that caused roof damage.
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 TBW wrote it up.
A mid level trough of low pressure moved into northern Florida, helping to intensify early afternoon thunderstorms. One of these storms produced minor wind gusts that caused roof damage.
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 Jul 22, 1:42 PM EST, 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 242 PM EDT MON JUL 22 2013 .SHORT TERM (TODAY THROUGH WEDNESDAY)... UNUSUAL JULY PATTERN CONTINUES...WITH AN AMPLIFYING TROUGH PUSHING INTO THE DEEP SOUTH. THE AXIS OF A RIDGE OF HIGH PRESSURE HAS SHIFTED SOUTH INTO SOUTHERN FLORIDA AHEAD OF THE TROUGH. THE SHORT TERM WILL BE TWO DIFFERENT TALES. THE NORTHERN PORTIONS OF THE CWA...MAINLY THE NATURE COAST...WILL SEE ELEVATED RAIN CHANCES AND CLOUDIER WEATHER THANKS TO THE TROUGH AND SOME ASSOCIATED SHORTWAVE TROUGHS THROUGH THE SHORT TERM PERIOD. THE OTHER PORTIONS OF THE CWA...MAINLY THE TAMPA BAY AREA...INLAND WEST CENTRAL FLORIDA...AND SOUTHWEST FLORIDA...WILL SEE THE MAIN DRIVER OF RAIN AND CLOUDS TO BE THE AFTERNOON SEA BREEZE. WITH THE WARM GULF WATERS OFF SHORE...ACTIVITY COULD LINGER IN THE WATERS DURING THE OVERNIGHTS AND INTO THE MORNING. ANY ACTIVITY THAT SURVIVES COULD RIDE THE SEA BREEZE OR SOUTHWEST TO WEST FLOW ON SHORE. OTHER THAN THIS ACTIVITY...MOST OF THE BEST RAIN AND STORM CHANCES WILL BE INLAND THANKS TO LESS MOISTURE COMPARED TO THE PREVIOUS FEW DAYS AND THE NECESSITY FOR MORE HEATING FOR CONVECTION TO INITIATE. THE WEAK FLOW COULD PRESENT A THREAT FOR FLOODING...WITH SLOW MOVING AND TRAINING STORMS BEING A POSSIBILITY...ALONG WITH THE THREAT OF WATERSPOUTS. EVEN FOR THIS RELATIVELY BIZZARE SYNOPTIC PATTERN FOR SUMMER...THE RESULTS ARE STILL NOT TOO FAR FROM THE ORDINARY FOR FLORIDA. TEMPERATURES WILL BE ON THE UPSWING AS CLOUD COVER DECREASES. GENERALLY LEANED TOWARDS THE MET IN THE MAV/MET BLEND FOR TONIGHT...USING A PURE MAV/MET BLEND IN LATER PERIODS. IT IS NOT VERY OFTEN THAT THE MET HAS WARMER OVERNIGHT LOW TEMPERATURES THAN THE MAV. .LONG TERM (WEDNESDAY NIGHT THROUGH NEXT MONDAY)... UPPER LEVEL PATTERN TO START OUT THE LONG TERM PERIOD WILL BE SOMEWHAT AMPLIFIED IN NATURE...WITH TROUGHING IN PLACE FROM THE GREAT LAKES REGION SOUTHWARD TO GA AND NORTH FLORIDA. ASSOCIATED WITH THIS UPPER LEVEL FEATURE WILL BE A SURFACE TROUGH/STALLED FRONTAL BOUNDARY ALONG OR JUST TO THE NORTH OF THE I-10 CORRIDOR. THIS PATTERN WILL HOLD THROUGH FRIDAY AND THE RESULTING GRADIENT BETWEEN THIS FEATURE AND THE SUBTROPICAL RIDGE AXIS OVER THE SOUTHERN FL PENINSULA WILL PROVIDE OUR FORECAST AREA WITH A GENERAL WESTERLY WIND COMPONENT. A WEST/SW WIND FLOW IS ALREADY FAVORABLE FOR NOCTURNAL MARINE CONVECTION TO DEVELOP AND MOVE BACK TOWARD SHORE DURING THE PRE-DAWN HOURS. THIS FLOW AND SOME ADDED LOW LEVEL FOCUS FROM THE NEARBY SURFACE TROUGH SHOULD FURTHER HELP THIS EARLY MORNING CONVECTIVE PROCESS ALONG...ESPECIALLY FROM PINELLAS COUNTY NORTHWARD TO LEVY COUNTY. WILL KEEP CHANCE POPS ALONG THE COAST EACH MORNING FOR THESE ZONES. THE WESTERLY FLOW WILL THEN ALLOW FOR THE BEST RAIN CHANCES DURING THE AFTERNOON TO TRANSITION TO THE I-75 CORRIDOR AND BEYOND AS THE SEA-BREEZE QUICKLY TRANSLATES INLAND. OVERALL EASTERN TROUGH DE-AMPLIFIES FOR THE UPCOMING WEEKEND LEAVING OUR REGION UNDERNEATH A NEUTRAL OR WEAKLY RIDGED ENVIRONMENT. THE SURFACE RIDGE AXIS SHOULD HOLD NEAR SOUTH FLORIDA KEEPING THE LOW LEVEL FLOW WEAKLY FROM THE WEST FOR MUCH OF OUR AREA. CLOSE TO THE RIDGE AXIS DOWN TOWARD FT MYERS THE FLOW WILL BE MORE VARIABLE. THE COMING WEEKENDS PATTERN LOOKS VERY TYPICAL FOR SUMMER IN TERMS OF TEMPERATURES AND DISTRIBUTION OF DIURNAL STORMS. THE FURTHER NORTH ONE GOES FROM THE RIDGE AXIS THE QUICKER THE STORMS WILL MOVE INLAND WITH THE SEABREEZE DURING THE AFTERNOON. THE LIGHTER/VARIABLE FLOW DOWN TOWARD CHARLOTTE/LEE COUNTIES WILL MAKE TEMPORAL OR SPATIAL DETAIL TO THE THUNDERSTORM EVOLUTION MORE DIFFICULT BETWEEN INLAND AND COASTAL LOCATIONS. GLOBAL GUIDANCE IS NOT REALLY IN GOOD AGREEMENT BY THE TIME THE EARLY PORTION OF NEXT WEEK ARRIVES IN TERMS OF LARGE SCALE SYNOPTIC PATTERN. THE GFS CURRENTLY SHOWS A MORE RIDGED PATTERN OVER THE PENINSULA WHILE THE ECMWF DIGS ANOTHER EASTERN U.S. TROUGH. FOR NOW WILL KEEP THE TEMP AND POP FORECASTS CLOSE TO CLIMO ON MONDAY UNTIL A BETTER CONSENSUS DEVELOPS BETWEEN THESE 2 RELIABLE GUIDANCE SETS. && .AVIATION... HAVE DEPICTED VCTS AT KLAL...KPGD...KFMY...AND KRSW TERMINALS THROUGH 20Z THIS AFTERNOON...OTHERWISE VFR IS EXPECTED AT ALL SITES AS THE CONVECTION DEVELOPING ALONG THE WEST COAST SEA BREEZE SHOULD REMAIN WELL EAST OF THE TERMINAL SITES. SOUTHWEST TO WEST WINDS AROUND 10 KNOTS THIS AFTERNOON WILL BECOME SOUTHWEST AND DIMINISH TO AROUND 5 KNOTS AFTER 02Z TONIGHT...THEN INCREASING TO 7 TO 10 KNOTS AFTER 14Z ON TUESDAY. && .MARINE... SOUTHWEST TO WEST WINDS AS THE RIDGE AXIS SETTLES INTO SOUTHERN FLORIDA THIS WEEK. WAVES AND WINDS SHOULD REMAIN BELOW SCEC CRITERIA...THOUGH SHOWERS AND THUNDERSTORMS COULD PRODUCE BRIEF HIGH WAVES AND WINDS IN THEIR VICINITIES. && .FIRE WEATHER... ABUNDANT MOISTURE AND RECENT RAINFALL WILL MITIGATE FIRE WEATHER CONCERNS. && .PRELIMINARY POINT TEMPS/POPS... TPA 79 89 77 89 / 10 40 20 40 FMY 76 91 76 91 / 10 20 10 30 GIF 75 90 74 92 / 20 40 20 40 SRQ 77 88 77 89 / 10 30 20 30 BKV 72 90 73 90 / 20 50 20 40 SPG 80 89 79 89 / 10 40 20 40 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && SHORT TERM/MARINE/FIRE WEATHER...02/GARCIA AVIATION...57/MCMICHAEL LONG TERM...14/MROCZKA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 254 AM EDT MON JUL 22 2013 FLZ039-042-043-048>052-055>057-060>062-065-GMZ830-850-853-856-870- 873-876-230000- 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- 254 AM EDT MON JUL 22 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... SCATTERED SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE AND INTENSITY THROUGH THE AFTERNOON...MAINLY OVER THE INTERIOR. SEVERE STORMS ARE NOT EXPECTED...BUT SOME OF THE STRONGER STORMS COULD CONTAIN WINDS OF 40 TO 50 MPH. ALL THUNDERSTORMS CAN PRODUCE DEADLY CLOUD TO GROUND LIGHTNING. ...FLOOD IMPACT... SOME AREAS MAY RECEIVE LOCALLY HEAVY RAIN TODAY RESULTING IN MINOR URBAN AND STREAM FLOODING. SOME LOCAL RIVERS ARE ALSO NEAR OR ABOVE FLOOD STAGE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. ...THUNDERSTORM IMPACT... A WESTERLY WIND FLOW WILL CONTINUE TO RESULT IN MORNING SHOWERS NEAR THE COAST AND SHOWERS AND STORMS INLAND EACH DAY. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE RESULTING IN SOME MINOR FLOODING. DESPITE THE DAILY STORMS...NO SIGNIFICANT SEVERE WEATHER IS ANTICIPATED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. MROCZKA
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1136 AM EDT MON JUL 22 2013
FLZ039-221615-
LEVY-
1136 AM EDT MON JUL 22 2013
...STRONG THUNDERSTORMS WILL AFFECT NORTHERN LEVY COUNTY...
NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THUNDERSTORMS
LOCATED ALONG A LINE EXTENDING FROM FANNING SPRINGS TO MANATEE
SPRINGS STATE PARK...OR ALONG A LINE EXTENDING FROM 6 MILES WEST OF
TRENTON TO 11 MILES WEST OF CHIEFLAND...MOVING EAST AT 30 MPH...WILL
AFFECT MANATEE SPRINGS STATE PARK AND CHIEFLAND...UNTIL 1215 PM EDT.
GUSTY WINDS 35 TO 45 MPH WILL OCCUR. FREQUENT LIGHTNING IS EXPECTED.
TO BE SAFE GO INDOORS IMMEDIATELY. IF CAUGHT OUTSIDE...FIND A LOW
SPOT...AND STAY AWAY FROM TALL OBJECTS. THIS STORM WILL PRODUCE PEA
SIZE HAIL. WHEN DRIVING THROUGH HEAVY RAIN...SLOW DOWN. ALWAYS LEAVE
A SAFE DISTANCE BETWEEN YOU AND OTHER VEHICLES.
&&
LAT...LON 2959 8277 2957 8275 2957 8266 2954 8265
2954 8256 2949 8255 2948 8252 2942 8254
2940 8303 2944 8302 2948 8299 2954 8298
2960 8293
TIME...MOT...LOC 1536Z 251DEG 26KT 2962 8291 2949 8303
RAGSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1224 PM EDT MON JUL 22 2013
FLZ043-221700-
SUMTER-
1224 PM EDT MON JUL 22 2013
...STRONG THUNDERSTORMS WILL AFFECT SUMTER COUNTY...
NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES A LINE OF
THUNDERSTORMS LOCATED ALONG A LINE EXTENDING FROM RUTLAND TO
ADAMSVILLE TO SUMTERVILLE TO WEBSTER...MOVING NORTHEAST AT 20
MPH...WILL AFFECT LAKE PANASOFFKEE...SUMTERVILLE...TARRYTOWN AND
ADAMSVILLE...UNTIL 100 PM EDT.
GUSTY WINDS 35 TO 45 MPH WILL OCCUR. FREQUENT LIGHTNING IS EXPECTED.
TO BE SAFE GO INDOORS IMMEDIATELY. IF CAUGHT OUTSIDE...FIND A LOW
SPOT...AND STAY AWAY FROM TALL OBJECTS. THIS STORM WILL PRODUCE PEA
SIZE HAIL. WHEN DRIVING THROUGH HEAVY RAIN...SLOW DOWN. ALWAYS LEAVE
A SAFE DISTANCE BETWEEN YOU AND OTHER VEHICLES.
&&
LAT...LON 2896 8195 2858 8195 2853 8206 2853 8210
2856 8214 2867 8210 2875 8211 2895 8229
2897 8226 2896 8196
TIME...MOT...LOC 1624Z 243DEG 16KT 2892 8214 2879 8202
2875 8201 2871 8201 2861 8205
RAGThe Tampa radar (KTBW), 76 km away, was scanning. The volume nearest the first event began at 19:38 UTC.
1 thunderstorm wind. Local standard time, as filed.
Broadcast media reported that a thunderstorm wind gust partially peeled the metal roof off of a building. Nearby trees and other buildings were not impacted. Time of damage was estimated from radar.
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, July 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: 469561.