Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 12, 2021, 5:41 PM EDT for 4 counties in Florida. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2021, 5:41 PM EDT (21:41 UTC)
- Expired
- Aug 12, 2021, 6:02 PM EDT
- In force
- 21 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hardee County, FL, Hillsborough County, FL, Manatee County, FL, Polk County, FL
The radar
The Tampa radar (KTBW), 44 km from the middle of the area, began a volume at 21:41 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, 9.7 hours before the alert went out and 44 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
- 1240 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- -39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
824 WUUS52 KTBW 122141 SVRTBW FLC049-057-081-105-122215- /O.NEW.KTBW.SV.W.0025.210812T2141Z-210812T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Tampa Bay Area Ruskin FL 541 PM EDT Thu Aug 12 2021 The National Weather Service in Ruskin has issued a * Severe Thunderstorm Warning for... Northwestern Hardee County in central Florida... Northeastern Manatee County in west central Florida... Southwestern Polk County in central Florida... Eastern Hillsborough County in west central Florida... * Until 615 PM EDT. * At 541 PM EDT, a severe thunderstorm was located near Ona, or 8 miles west of Wauchula, moving west at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Duette and Fort Green. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 2763 8185 2751 8187 2749 8218 2775 8210 TIME...MOT...LOC 2141Z 106DEG 11KT 2757 8194 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ TBW
1 follow-up statement
996
WWUS52 KTBW 122202
SVSTBW
Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
602 PM EDT Thu Aug 12 2021
FLC049-057-081-105-122212-
/O.CAN.KTBW.SV.W.0025.000000T0000Z-210812T2215Z/
Hardee FL-Manatee FL-Polk FL-Hillsborough FL-
602 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HARDEE...
NORTHEASTERN MANATEE...SOUTHWESTERN POLK AND EASTERN HILLSBOROUGH
COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 2763 8185 2751 8187 2749 8218 2775 8210
TIME...MOT...LOC 2155Z 106DEG 11KT 2759 8201
$$
TBWThe office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:56 PM EDT | Special Marine Warning | TBW | 49 min | |
| Aug 12, 4:16 PM EDT | Special Weather Statement | TBW | Hillsborough | 44 min |
| Aug 12, 4:33 PM EDT | Special Weather Statement | TBW | Sumter | 42 min |
| Aug 12, 5:01 PM EDT | Special Weather Statement | TBW | Pasco, Pinellas | 44 min |
| Aug 12, 5:02 PM EDT | Special Weather Statement | TBW | Manatee | 43 min |
| Aug 12, 5:04 PM EDT | Special Marine Warning | TBW | 56 min | |
| Aug 12, 5:32 PM EDT | Special Weather Statement | TBW | Hardee | 28 min |
| Aug 12, 5:36 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough, Pinellas | 24 min |
| Aug 12, 5:52 PM EDT | Special Weather Statement | TBW | Manatee | 38 min |
| Aug 12, 5:53 PM EDT | Special Weather Statement | TBW | Pasco | 37 min |
| Aug 12, 5:57 PM EDT | Severe Thunderstorm Warning | TBW | Manatee, Sarasota | 37 min |
| Aug 12, 5:59 PM EDT | Special Marine Warning | TBW | 61 min | |
| Aug 12, 6:00 PM EDT | Special Marine Warning | TBW | 45 min | |
| Aug 12, 6:29 PM EDT | Special Weather Statement | TBW | Hillsborough | 46 min |
| Aug 12, 6:59 PM EDT | Special Marine Warning | TBW | 31 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning in 2021
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.