Alert archive / Florida / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 107, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 21, 2007, 2:18 PM EDT for Hillsborough County, Florida. It was in force for 27 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 21, 2007, 2:18 PM EDT (18:18 UTC)
- Expired
- Jul 21, 2007, 2:45 PM EDT
- In force
- 27 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Counties, with a storm outline in the text
County Hillsborough County, FL
The radar
The Tampa radar (KTBW), 23 km from the middle of the area, began a volume at 18:22 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
Tampa Bay, FL (KTBW), launched 12:00Z, 6.3 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
- 3958 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 678 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 23 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 21, 1:33 PM EDT, 45 minutes earlier.
Area forecast discussion, Jul 21, 1:33 PM EDT, 45 minutes before
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HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 911 AM EDT SAT JUL 21 2007 FLZ039-042-043-048>052-055>057-060>062-065-220115- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 911 AM EDT SAT JUL 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... A SERIES OF UPPER LEVEL DISTURBANCES COMBINED WITH WILL MOVE THROUGH THE REGION AND COMBINE WITH THE WARM...MOIST AND VERY UNSTABLE ATMOSPHERE OVER THE AREA TO CREATE NUMEROUS THUNDERSTORMS TODAY. SCATTERED THUNDERSTORMS ARE ALREADY OCCURRING OVER COASTAL AREAS OF THE SOUTH OF TAMPA BAY THIS MORNING AND AREAL COVERAGE SHOULD INCREASE ELSEWHERE AS THE WEST COAST SEA BREEZE DEVELOPS AND MOVES INLAND EARLY TO MID AFTERNOON. OVER THE COASTAL WATERS...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY. THUNDERSTORMS THAT DEVELOP TODAY WILL CONTAIN HEAVY DOWNPOURS... GUSTY WINDS AND FREQUENT DEADLY CLOUD TO GROUND LIGHTNING. A FEW OF THE STORMS COULD BECOME STRONG AND CONTAIN SMALL HAIL THIS AFTERNOON AND EVENING. IF A THUNDERSTORM APPROACHES YOUR LOCATION...MOVE INDOORS IMMEDIATELY. REMEMBER... IF YOU CAN HEAR THE THUNDER THEN YOU ARE CLOSE ENOUGH TO THE STORM TO BE STRUCK BY LIGHTNING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. ...THUNDERSTORM IMPACT... SCATTERED THUNDERSTORMS ARE EXPECTED EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. PAXTON
In the hours before
Special weather statement, Jul 21, 11:49 AM EDT, 2 hours 29 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 |
|---|---|---|---|---|
| Jul 21, 11:35 AM EDT | Tornado Warning | TBW | Lee | 25 min |
| Jul 21, 12:13 PM EDT | Severe Thunderstorm Warning | TBW | Charlotte, Lee | 35 min |
| Jul 21, 1:25 PM EDT | Special Marine Warning | TBW | 50 min | |
| Jul 21, 1:32 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 28 min |
| Jul 21, 2:31 PM EDT | Special Marine Warning | TBW | 89 min | |
| Jul 21, 2:48 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough, Polk | 27 min |
| Jul 21, 3:54 PM EDT | Special Marine Warning | TBW | 96 min | |
| Jul 21, 4:07 PM EDT | Special Marine Warning | TBW | 38 min | |
| Jul 21, 4:20 PM EDT | Severe Thunderstorm Warning | TBW | Citrus, Sumter | 40 min |
| Jul 21, 4:58 PM EDT | Special Marine Warning | TBW | 62 min |
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.