Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 26, NWS Tampa Bay, FL

August 12, 2021Manatee County, Sarasota County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 12, 2021, 5:57 PM EDT for Manatee County, Sarasota County, Florida. It was in force for 37 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 12, 2021, 5:57 PM EDT (21:57 UTC)
Expired: Aug 12, 2021, 6:34 PM EDT
In force: 37 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Manatee County, FL, Sarasota County, FL

The radar

The Tampa radar (KTBW), 26 km from the middle of the area, began a volume at 22:02 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.

What was reported inside it

Time	Report	Where	Remark
Aug 12, 5:59 PM EDT	TSTM WND DMG	3 N Ellenton, FL	DELAYED REPORT... STATE EMERGENCY MANAGEMENT REPORTED THAT A ROOF WAS BLOWN OFF OF A MOBILE HOME ON IMPERIAL AVENUE NEAR ELLENTON. NO INJURIES REPORTED. TIME ESTIMATED FROM RADAR.
Aug 12, 6:01 PM EDT	TSTM WND DMG	1 E Ellenton, FL	DELAYED REPORT... STATE EMERGENCY MANAGEMENT REPORTED THAT A TREE FELL ONTO A MOBILE HOME ON 46TH AVENUE DRIVE EAST IN ELLENTON. NO INJURIES REPORTED. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 10.0 hours before the alert went out and 26 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted.

743 
WUUS52 KTBW 122157
SVRTBW
FLC081-115-122245-
/O.NEW.KTBW.SV.W.0026.210812T2157Z-210812T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
557 PM EDT Thu Aug 12 2021

The National Weather Service in Ruskin has issued a

* Severe Thunderstorm Warning for...
  Northwestern Manatee County in west central Florida...
  Northwestern Sarasota County in west central Florida...

* Until 645 PM EDT.

* At 557 PM EDT, a severe thunderstorm was located over Ellenton, or
  near Palmetto, moving southwest at 20 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...
  Sarasota, Bradenton, Palmetto, Holmes Beach, Anna Maria, Bradenton
  Beach, Bayshore Gardens, Ellenton, Cortez and Whitney Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2765 8253 2765 8248 2751 8234 2730 8266
      2750 8278 2754 8280
TIME...MOT...LOC 2157Z 057DEG 18KT 2755 8252 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TBW

1 follow-up statement

659 
WWUS52 KTBW 122234
SVSTBW

Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
634 PM EDT Thu Aug 12 2021

FLC081-115-122241-
/O.CAN.KTBW.SV.W.0026.000000T0000Z-210812T2245Z/
Manatee FL-Sarasota FL-
634 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MANATEE AND
NORTHWESTERN SARASOTA COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 2765 8253 2765 8248 2751 8234 2730 8266
      2750 8278 2754 8280
TIME...MOT...LOC 2229Z 057DEG 18KT 2745 8268 

$$

TBW

The 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, 5:41 PM EDT	Severe Thunderstorm Warning	TBW	Hardee, Hillsborough, Manatee, Polk	21 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, 5:59 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, 2021 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.