Alert archive / Florida / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 47, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 21, 2008, 10:21 AM EDT for Hillsborough County, Florida. It was in force for 24 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
- Jun 21, 2008, 10:21 AM EDT (14:21 UTC)
- Expired
- Jun 21, 2008, 10:45 AM EDT
- In force
- 24 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
County Hillsborough County, FL
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 2.4 hours before the alert went out and 23 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
- 2426 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
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 Jun 21, 9:43 AM EDT, 38 minutes earlier.
Area forecast discussion, Jun 21, 9:43 AM EDT, 38 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 943 AM EDT SAT JUN 21 2008 .DISCUSSION...DEEP MOISTURE HAS OVERSPREAD THE REGION AND AS IS TYPICAL WITH AN AREA OF DEEP MOISTURE...WITH PRECIPITABLE WATER OVER 2 INCHES...PLENTY OF MID CLOUDS HAVE SPREAD ACROSS MOST OF THE REGION. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER THE EASTERN GULF AS THE SHORT WAVE MOVING ACROSS THE SOUTHEAST U.S. APPROACHES. THIS TREND SHOULD CONTINUE THROUGH THE AFTERNOON ACROSS THE NORTHERN HALF OF THE AREA WITH THE CONVECTION PUSHING MORE INLAND AS THE AFTERNOON PROGRESSES OVER THE SOUTHERN HALF. TEMPERATURES ARE STRUGGLING AND HAVE ADJUSTED FORECAST MAXES DOWN SLIGHTLY IN GRIDS. HAVE ALSO RAISED POPS TO 70 PERCENT ACROSS THE NATURE COAST AND LEFT THE 60 PERCENT ELSEWHERE. OVERALL PRESENT GRIDS LOOK ON TRACK WITH NO OTHER UPDATES EXPECTED FOR THIS MORNING. && .AVIATION...SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH MID-AFTERNOON AT THE TERMINAL SITES CAUSING SOME MVFR/LOCAL IFR CONDITIONS. OTHERWISE...VFR CONDITIONS ARE EXPECTED THROUGH TONIGHT. && .MARINE...FAVORABLE CONDITIONS FOR WATERSPOUTS WILL CONTINUE THIS MORNING AS SURFACE FLOW IS PRETTY LIGHT OUT OF THE SOUTH TO SOUTHWEST WITH WESTERLY FLOW JUST ABOVE AND HAVE HIGHLIGHTED THIS POSSIBILITY IN A MARINE WEATHER STATEMENT. OTHERWISE...WEST TO SOUTHWEST WINDS WILL CONTINUE AROUND 10 KNOTS OR LESS TODAY WITH HIGHER WINDS AND SEAS POSSIBLE IN AND NEAR THUNDERSTORMS. && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && PRC/JC
Hazardous weather outlook, Jun 21, 3:30 AM EDT, 6 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 330 AM EDT SAT JUN 21 2008 FLZ039-042-043-048>052-055>057-060>062-065-212130- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 330 AM EDT SAT JUN 21 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THIS MORNING WILL BECOME MORE NUMEROUS THROUGH THE DAY...AS ACTIVITY INITIALLY ALONG THE COAST MOVES NORTH AND INLAND. IN ADDITION TO FREQUENT LIGHTNING... ANY THUNDERSTORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS AND HEAVY RAIN. MOTORISTS SHOULD USE CAUTION WHEN DRIVING THROUGH AREAS OF RAIN. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. ...THUNDERSTORM IMPACT... SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE EACH DAY. IN ADDITION TO LIGHTNING...THE THUNDERSTORMS MAY PRODUCE GUSTY WINDS AND HEAVY RAIN. MOTORISTS SHOULD USE CAUTION WHEN DRIVING THROUGH AREAS OF RAIN. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. 17
In the hours before
Local storm report, Jun 21, 8:41 AM EDT, 1 hour 40 minutes before
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</html>Local storm report, Jun 21, 8:57 AM EDT, 1 hour 24 minutes before
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</html>The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 9:01 AM EDT | Special Marine Warning | TBW | 29 min | |
| Jun 21, 10:18 AM EDT | Special Marine Warning | TBW | 27 min | |
| Jun 21, 10:39 AM EDT | Special Marine Warning | TBW | 66 min | |
| Jun 21, 10:48 AM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 27 min |
| Jun 21, 12:35 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 40 min |
| Jun 21, 1:15 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 30 min |
| Jun 21, 1:36 PM EDT | Areal Flood Advisory | TBW | Manatee, Sarasota | 54 min |
| Jun 21, 4:47 PM EDT | Special Marine Warning | TBW | 28 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2008Every severe thunderstorm warning in 2008
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.