Alert archive / Florida / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 81, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 14, 2007, 2:47 PM EDT for Polk County, Florida. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2007, 2:47 PM EDT (18:47 UTC)
- Expired
- Jul 14, 2007, 3:15 PM EDT
- In force
- 28 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Counties, with a storm outline in the text
County Polk County, FL
The radar
The Tampa radar (KTBW), 74 km from the middle of the area, began a volume at 18:47 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 6.8 hours before the alert went out and 275 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2387 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 791 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jul 14, 1:07 PM EDT, 1 hour 40 minutes earlier.
Area forecast discussion, Jul 14, 1:07 PM EDT, 1 hour 40 minutes before
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</html>Hazardous weather outlook, Jul 14, 5:10 AM EDT, 9 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 510 AM EDT SAT JUL 14 2007 FLZ039-042-043-048>052-055>057-060>062-065-141500- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 510 AM EDT SAT JUL 14 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ...THUNDERSTORM IMPACT... THE SURFACE RIDGE AXIS WILL REMAIN ACROSS SOUTH FLORIDA CONTINUING THE SOUTH TO SOUTHWEST FLOW ACROSS THE REGION TODAY. ISOLATED THUNDERSTORMS OVER THE COASTAL WATERS WILL CONTINUE TO DRIFT ONSHORE EARLY THIS MORNING AND BECOME SCATTERED AS THEY MOVE INLAND DURING THE LATE MORNING AND AFTERNOON HOURS. HIGHEST RAIN CHANCES WILL ONCE AGAIN BE ACROSS INLAND PORTIONS OF WEST CENTRAL AND SOUTHWEST FLORIDA. THUNDERSTORMS THAT DEVELOP TODAY WILL CONTAIN BRIEF MODERATE TO HEAVY DOWNPOURS...GUSTY WINDS AND FREQUENT DEADLY CLOUD TO GROUND LIGHTNING. A FEW OF THE STORMS COULD BECOME STRONG OVER INLAND AREAS AND CONTAIN SMALL HAIL THIS AFTERNOON AND EVENING. IF A THUNDERSTORM APPROACHES YOUR LOCATION...MOVE INDOORS IMMEDIATELY. REMEMBER...IF YOU CAN HEAR THE THUNDER YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. ...THUNDERSTORM IMPACT... ON SUNDAY THE RIDGE AXIS WILL DRIFT NORTH INTO CENTRAL FLORIDA SETTING UP A RATHER LIGHT WIND FLOW ACROSS THE REGION WHICH WILL ALLOW THE SEA BREEZES TO DEVELOP AND MOVE INLAND LEADING TO SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS. FOR MONDAY THROUGH FRIDAY THE RIDGE AXIS WILL DRIFT NORTH INTO NORTH FLORIDA SETTING UP A MORE TYPICAL SCATTERED AFTERNOON AND EVENING THUNDERSTORM PATTERN WITH HIGHEST CHANCES CLOSER TO THE COAST. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. PRC
Nearby
Severe Thunderstorm Warnings in Florida, 2007Every severe thunderstorm warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.