Showers and thunderstorms marched eastward throughout the day ahead of a stalled cold front in north Florida.
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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.
Showers and thunderstorms marched eastward throughout the day ahead of a stalled cold front in north Florida.
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 10, 12:45 PM EST, 5 hours 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 145 PM EDT FRI JUL 10 2009 .SHORT TERM... REMNANTS OF A FRONTAL BOUNDARY ARE DRAPED ACROSS NORTHERN PORTIONS OF THE FORECAST AREA THIS AFTERNOON. UPPER TROUGH HAS PUSHED INTO THE SOUTH CENTRAL PORTION OF THE STATE AND WATER VAPOR IMAGERY SHOWING SOME RELATIVELY DRY AIR OVER MUCH OF THE NE GULF. ALTHOUGH CONVECTIVE PARAMETERS ARE STILL RIPE FOR SOME STRONG TO SEVERE STORMS DEVELOPING (LI AROUND -9 TO -10...CAPE AROUND 3000 J/KG)...ONLY SEEING A FEW STORMS ON RADAR CURRENTLY (MOSTLY IN THE NORTH AHEAD OF THE FRONTAL BOUNDARY). CLOUD COVER SEEMS TO BE THE LIMITING FACTOR SO FAR...A FEW SITES THAT HAVE BEEN CLEAR FOR AN HOUR OR TWO ARE SEEING TEMPERATURES IN THE UPPER 80S TO AROUND 90...BUT THOSE SITES THAT HAVE NOT BROKEN OUT YET ARE STILL IN THE MID 80S. AS WE CONTINUE TO WARM UP IN THE NEXT FEW HOURS AND WHERE THERE ARE/WILL BE BREAKS IN THE CLOUDS...EXPECT AN INCREASE IN COVERAGE OF THE STORMS AS WELL AS A THREAT FOR GUSTY WINDS...HEAVY RAIN...FREQUENT LIGHTNING...AND EVEN THE POSSIBILITY OF SEEING SOME HAIL. ACTIVITY WILL DIMINISH AFTER LOSS OF DAYTIME HEATING...ALTHOUGH DUE TO INTERACTIONS WITH ANY LEFTOVER OUTFLOWS WE COULD SEE SOME ONGOING SCT COVERAGE OF THUNDERSTORMS THROUGH LATE EVENING/MIDNIGHT. SURFACE BOUNDARY AND UPPER TROUGH PULL OFF TO THE EAST BY SATURDAY MORNING...ALLOWING SURFACE RIDGE TO FINALLY PUSH NORTHWARD OVER THE PENINSULA THIS WEEKEND. THIS MEANS MAINLY SEA-BREEZE INDUCED SHOWERS AND THUNDERSTORMS OVER THE NORMAL LOCATIONS DURING THE DAY(S). HAVE KEPT SLIGHTLY LOWER POPS ON SUNDAY DUE TO DRIER AIR ALOFT...ESPECIALLY UP IN NORTHERN PORTIONS OF THE AREA. TEMPS WILL BE NEAR NORMAL...A FEW DEGREES HIGHER ON SUNDAY WITH LESS CLOUDS. .LONG TERM... UPPER LEVEL RIDGE CENTERED OVER NORTH TEXAS CONTINUES TO BUILD INTO THE REGION FOR THE START OF THE PERIOD. THIS SYSTEM WILL GRADUALLY WEAKEN AND BECOME MORE BROAD AS THE UPPER LEVEL TROUGH DRIFTS OUT INTO THE ATLANTIC. AT THE SURFACE, THE HIGH PRESSURE RIDGE AXIS WILL REMAIN STRETCHED ACROSS THE REGION THROUGH THURSDAY, MEANDERING SOUTHWARD SLIGHTLY TOWARDS THE END OF THE LONG TERM. FOR THE MOST PART, THE GFS AND ECMWF WERE IN GOOD AGREEMENT ABOUT THE PLACEMENT OF THE SURFACE RIDGE, BUT BECAME LESS IN AGREEMENT ABOUT THE STRENGTH TOWARDS THE END OF THE PERIOD. LEANED TOWARDS THE ECMWF SO KEPT A LIGHT SOUTH SOUTHEAST FLOW IN THE SOUTH ZONES AND A SOUTH SOUTHWEST FLOW IN THE NORTHERN ZONES. WITH THIS PATTERN IN PLACE, EXPECT SEA BREEZE CONVECTION TO TAKE PLACE EACH AFTERNOON AND FAVOR AREAS NEAR THE I 75 CORRIDOR. TEMPS STILL EXPECT TO HOVER AROUND NORMAL VALUES. && .AVIATION... THUNDERSTORM ACTIVITY IS FORMING ALONG THE SEA BREEZE NORTH OF TAMPA BAY. EXPECTING COVERAGE TO INCREASE THROUGHOUT THE AFTERNOON INTO THE EARLY EVENING, THEREFORE HAVE KEPT VCTS AT ALL TAF SITES. SCATTERED STORMS MAY CAUSE TEMPORARY MVFR/IFR CONDITIONS. && .MARINE... AS DISSIPATING FRONTAL BOUNDARY MOVES EAST OF THE WATERS AND HIGH PRESSURE BUILDS IN FROM THE SOUTH TONIGHT THROUGH THE WEEKEND...WINDS BECOME MORE N/NE BY SATURDAY MORNING AND REMAIN IN THE 5-10KT RANGE THROUGHOUT THE DAY. WINDS ARE MORE VARIABLE ON SUNDAY AS THE HIGH PRESSURE RIDGE AXIS BUILDS IN OVERHEAD...BUT SPEEDS LOOK TO REMAIN 10KTS OR LESS. LIGHT WINDS CONTINUE THROUGH EARLY NEXT WEEK WITH RIDGE REMAINING OVER THE AREA. && .FIRE WEATHER... NO FIRE WEATHER CONCERNS. && .PRELIMINARY POINT TEMPS/POPS... TPA 73 90 73 91 / 30 50 20 30 FMY 72 93 72 93 / 30 50 20 40 GIF 71 92 71 93 / 30 50 20 40 SRQ 72 91 72 91 / 30 50 20 30 BKV 68 91 69 92 / 30 50 20 30 SPG 75 90 75 91 / 30 40 20 30 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && SHORT TERM/MARINE/FIRE WEATHER...23/MCNATT LONG TERM/AVIATION...20/BARRON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 929 AM EDT FRI JUL 10 2009 FLZ039-042-043-048>052-055>057-060>062-065-110130- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 929 AM EDT FRI JUL 10 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... SCATTERED TO NUMEROUS THUNDERSTORMS WILL AGAIN DEVELOP TODAY WITH THE BEST CHANCES AROUND THE TAMPA BAY AREA. THE MAIN THREATS FROM ANY STORMS WILL BE LOCALLY HEAVY RAINFALL...HAIL...GUSTY WINDS AND FREQUENT LIGHTNING. REMEMBER...IF YOU CAN HEAR THUNDER THEN YOU ARE CLOSE ENOUGH TO THE STORM TO BE STRUCK BY LIGHTNING. ...FLOOD IMPACT... WIDESPREAD RAINFALL TOTALS OF 1 TO 2 INCHES ARE EXPECTED TODAY... WITH LOCALLY 2 TO 4+ INCHES WHERE TRAINING OF HEAVIER SHOWERS AND THUNDERSTORMS OCCURS. FLOODING OF STREETS MAY OCCUR...AND SOME MAY BECOME IMPASSIBLE FOR SEVERAL HOURS. FLOOD WATERS MAY APPROACH SOME HOMES IN LOW LYING FLOOD PRONE AREAS. FAST RESPONDING RIVERS SUCH AS THE MANATEE RIVER AT MYAKKA HEAD AND THE MYAKKA RIVER AT MYAKKA STATE PARK MAY QUICKLY APPROACH OR EXCEED FLOOD STAGE TODAY AS WELL. ...WATERSPOUT IMPACT... SHOWERS AND THUNDERSTORMS OVER THE COASTAL WATERS COULD PRODUCE BRIEF WATERSPOUTS AT ALMOST ANYTIME. MARINERS SHOULD BE ON THE LOOKOUT AND IF THREATENING WEATHER SUDDENLY DEVELOPS OR APPROACHES YOUR LOCATION...BE PREPARED TO MOVE TO SAFE HARBOR QUICKLY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. ...THUNDERSTORM IMPACT... A RETURN TO A MORE NORMAL SUMMERTIME RAIN PATTERN IS EXPECTED TO SET UP THIS WEEKEND INTO NEXT WEEK WITH SCATTERED THUNDERSTORMS MAINLY IN THE AFTERNOONS AND EVENINGS EACH DAY. THE MAIN THREATS FROM ANY STORMS WILL CONTINUE TO BE LOCALLY HEAVY RAINFALL...GUSTY WINDS AND FREQUENT LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. MCNATT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 134 PM EDT FRI JUL 10 2009 FLZ042-043-048-049-101815- SUMTER-HERNANDO-CITRUS-PASCO- 134 PM EDT FRI JUL 10 2009 ...STRONG THUNDERSTORMS WILL AFFECT WESTERN PASCO...SOUTHEASTERN CITRUS...EASTERN HERNANDO AND CENTRAL SUMTER COUNTIES... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES A LINE OF DEVELOPING THUNDERSTORMS THAT WERE STATIONARY. THESE THUNDERSTORMS WILL AFFECT MOON LAKE ESTATES...MASARYKTOWN...RIDGE MANOR... BUSHNELL...DARBY...CROOM....WEBSTER...AND LAND O LAKES ...UNTIL 215 PM EDT. GUSTY WINDS UP TO 40 MPH WILL BE POSSIBLE. FREQUENT LIGHTNING IS EXPECTED. TO BE SAFE GO INDOORS IMMEDIATELY IF CAUGHT OUTSIDE...FIND A LOW SPOT...AND STAY AWAY FROM TALL OBJECTS. THESE STORMS MAY PRODUCE PEA SIZE HAIL. WHEN DRIVING THROUGH HEAVY RAIN...SLOW DOWN. ALWAYS LEAVE A SAFE DISTANCE BETWEEN YOU AND OTHER VEHICLES. && LAT...LON 2863 8200 2818 8247 2828 8267 2875 8219 TIME...MOT...LOC 1730Z 320DEG 1KT 2867 8217 2828 8254
The Tampa radar (KTBW), 61 km away, was scanning. The volume nearest the first event began at 23:01 UTC.
1 hail. Local standard time, as filed.
Nickel size hail and one downed tree was reported in the Wauchula area as a thunderstorm moved through.
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, July 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: 185798.