Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 16, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at May 30, 2021, 4:58 PM EDT for Hillsborough County, Polk County, Florida. It was in force for 32 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
- May 30, 2021, 4:58 PM EDT (20:58 UTC)
- Expired
- May 30, 2021, 5:30 PM EDT
- In force
- 32 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hillsborough County, FL, Polk County, FL
The radar
The Tampa radar (KTBW), 28 km from the middle of the area, began a volume at 20:59 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, 9.0 hours before the alert went out and 28 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
- 1117 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 737 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
195
WUUS52 KTBW 302058
SVRTBW
FLC057-105-302130-
/O.NEW.KTBW.SV.W.0016.210530T2058Z-210530T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
458 PM EDT Sun May 30 2021
The National Weather Service in Ruskin has issued a
* Severe Thunderstorm Warning for...
Western Polk County in central Florida...
Southeastern Hillsborough County in west central Florida...
* Until 530 PM EDT.
* At 458 PM EDT, a severe thunderstorm was located over Fish Hawk,
moving southeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Alafia River State Park, Lithia Springs State Park, Fish Hawk,
Bloomingdale, Boyette, Valrico and Brandon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2792 8226 2796 8212 2777 8197 2770 8226
TIME...MOT...LOC 2058Z 334DEG 11KT 2786 8217
HAIL...1.00IN
WIND...60MPH
$$
TBW2 follow-up statements
212
WWUS52 KTBW 302118
SVSTBW
Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
518 PM EDT Sun May 30 2021
FLC105-302127-
/O.CAN.KTBW.SV.W.0016.000000T0000Z-210530T2130Z/
Polk FL-
518 PM EDT Sun May 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN POLK COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
LAT...LON 2792 8226 2796 8212 2787 8205 2782 8205
2773 8226
TIME...MOT...LOC 2117Z 046DEG 5KT 2787 8222
$$
FLC057-302130-
/O.CON.KTBW.SV.W.0016.000000T0000Z-210530T2130Z/
Hillsborough FL-
518 PM EDT Sun May 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR EAST CENTRAL HILLSBOROUGH COUNTY...
At 517 PM EDT, a severe thunderstorm was located over Fish Hawk,
moving southwest at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Lithia Springs State Park, Fish Hawk, Bloomingdale, Boyette, Valrico
and Brandon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2792 8226 2796 8212 2787 8205 2782 8205
2773 8226
TIME...MOT...LOC 2117Z 046DEG 5KT 2787 8222
HAIL...1.00IN
WIND...60MPH
$$
TBW825
WWUS52 KTBW 302126
SVSTBW
Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
526 PM EDT Sun May 30 2021
FLC057-302135-
/O.EXP.KTBW.SV.W.0016.000000T0000Z-210530T2130Z/
Hillsborough FL-
526 PM EDT Sun May 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HILLSBOROUGH
COUNTY WILL EXPIRE AT 530 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
and gusty winds are still possible with this thunderstorm.
LAT...LON 2792 8226 2796 8212 2787 8205 2782 8205
2773 8226
TIME...MOT...LOC 2125Z 335DEG 11KT 2787 8223
$$
TBWThe office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 2:19 PM EDT | Special Weather Statement | TBW | Hernando | 26 min |
| May 30, 3:45 PM EDT | Special Weather Statement | TBW | Pasco | 30 min |
| May 30, 3:47 PM EDT | Special Weather Statement | TBW | Pasco | 28 min |
| May 30, 4:34 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough, Polk | 26 min |
| May 30, 5:05 PM EDT | Special Weather Statement | TBW | Polk | 25 min |
| May 30, 5:09 PM EDT | Special Marine Warning | TBW | 36 min | |
| May 30, 5:14 PM EDT | Special Weather Statement | TBW | Hillsborough | 16 min |
| May 30, 5:53 PM EDT | Special Weather Statement | TBW | Highlands | 52 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.