Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 22, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 12, 2021, 3:57 PM EDT for Pinellas County, Florida. It was in force for 19 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
- Jul 12, 2021, 3:57 PM EDT (19:57 UTC)
- Expired
- Jul 12, 2021, 4:16 PM EDT
- In force
- 19 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Pinellas County, FL
The radar
The Tampa radar (KTBW), 50 km from the middle of the area, began a volume at 19:57 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, 8.0 hours before the alert went out and 50 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
- 1557 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 960 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
657
WUUS52 KTBW 121957
SVRTBW
FLC103-122030-
/O.NEW.KTBW.SV.W.0022.210712T1957Z-210712T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
357 PM EDT Mon Jul 12 2021
The National Weather Service in Ruskin has issued a
* Severe Thunderstorm Warning for...
West central Pinellas County in west central Florida...
* Until 430 PM EDT.
* At 357 PM EDT, a severe thunderstorm was located over Harbor
Bluffs, or near Largo, moving northwest at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Clearwater, Largo, Pinellas Park, Seminole, Madeira Beach,
Belleair, Redington Shores, Belleair Bluffs, Belleair Beach and
Redington Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2798 8291 2803 8287 2802 8278 2786 8274
2779 8278 2786 8291
TIME...MOT...LOC 1957Z 135DEG 15KT 2793 8285
HAIL...0.75IN
WIND...60MPH
$$
TBW1 follow-up statement
836
WWUS52 KTBW 122016
SVSTBW
Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
416 PM EDT Mon Jul 12 2021
FLC103-122025-
/O.CAN.KTBW.SV.W.0022.000000T0000Z-210712T2030Z/
Pinellas FL-
416 PM EDT Mon Jul 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL PINELLAS COUNTY
IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 2798 8291 2803 8287 2802 8278 2786 8274
2779 8278 2786 8291
TIME...MOT...LOC 2012Z 135DEG 15KT 2798 8291
$$
TBWThe office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:57 PM EDT | Special Marine Warning | TBW | 63 min | |
| Jul 12, 3:00 PM EDT | Special Weather Statement | TBW | Hillsborough | 45 min |
| Jul 12, 3:10 PM EDT | Special Weather Statement | TBW | Sumter | 50 min |
| Jul 12, 3:24 PM EDT | Special Weather Statement | TBW | Hillsborough, Pinellas | 51 min |
| Jul 12, 3:26 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough, Pinellas | 19 min |
| Jul 12, 3:57 PM EDT | Special Marine Warning | TBW | 63 min | |
| Jul 12, 4:14 PM EDT | Severe Thunderstorm Warning | TBW | Hernando, Pasco | 17 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.