Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Tampa Bay, FL

April 19, 2021Highlands County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Apr 19, 2021, 3:33 PM EDT for Highlands 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 outline as issued.

The facts

Issued
Apr 19, 2021, 3:33 PM EDT (19:33 UTC)
Expired
Apr 19, 2021, 4:00 PM EDT
In force
27 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Highlands County, FL

The radar

The Melbourne radar (KMLB), 98 km from the middle of the area, began a volume at 19:34 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, 7.6 hours before the alert went out and 133 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-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2021-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 542 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2021-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
542 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
-20 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

165 
WUUS52 KTBW 191933
SVRTBW
FLC055-192000-
/O.NEW.KTBW.SV.W.0014.210419T1933Z-210419T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
333 PM EDT Mon Apr 19 2021

The National Weather Service in Ruskin has issued a

* Severe Thunderstorm Warning for...
  Central Highlands County in south central Florida...

* Until 400 PM EDT.

* At 332 PM EDT, a severe thunderstorm was located near Lake
  Istokpoga, or 8 miles east of Lake Placid, moving northeast at 30
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Lake Istokpoga, Sylvan Shores and Cornwell. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2721 8116 2718 8120 2732 8135 2748 8119
      2744 8114 2741 8114 2739 8112 2738 8110
      2738 8107 2735 8103 2734 8105 2732 8103
      2730 8103 2730 8102
TIME...MOT...LOC 1932Z 227DEG 24KT 2731 8122 

HAIL...<.75IN
WIND...60MPH
 
$$

TBW
1 follow-up statement
140 
WWUS52 KTBW 191954
SVSTBW

Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
354 PM EDT Mon Apr 19 2021

FLC055-192004-
/O.EXP.KTBW.SV.W.0014.000000T0000Z-210419T2000Z/
Highlands FL-
354 PM EDT Mon Apr 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HIGHLANDS COUNTY WILL
EXPIRE AT 400 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 gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 2721 8116 2718 8120 2732 8135 2748 8119
      2744 8114 2741 8114 2739 8112 2738 8110
      2738 8107 2735 8103 2734 8105 2732 8103
      2730 8103 2730 8102
TIME...MOT...LOC 1954Z 227DEG 24KT 2737 8115 

$$

TBW

The office that day

Everything else NWS Tampa Bay, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 18, 9:23 PM EDTSpecial Marine WarningTBW37 min
Apr 18, 9:26 PM EDTTornado WarningTBWHillsborough, Pasco, Pinellas34 min
Apr 18, 9:55 PM EDTSpecial Weather StatementTBWPinellas35 min
Apr 18, 10:53 PM EDTSpecial Weather StatementTBWPolk22 min
Apr 18, 11:16 PM EDTSpecial Weather StatementTBWPolk44 min
Apr 19, 3:33 AM EDTSpecial Marine WarningTBW57 min
Apr 19, 4:14 AM EDTSpecial Weather StatementTBWPolk46 min
Apr 19, 4:18 AM EDTSpecial Weather StatementTBWManatee27 min
Apr 19, 4:26 AM EDTSevere Thunderstorm WarningTBWPolk34 min
Apr 19, 4:57 AM EDTSpecial Marine WarningTBW63 min
Apr 19, 5:01 AM EDTSpecial Weather StatementTBWPolk44 min
Apr 19, 5:42 AM EDTSpecial Weather StatementTBWHardee48 min
Apr 19, 5:48 AM EDTSevere Thunderstorm WarningTBWPolk42 min
Apr 19, 5:58 AM EDTAreal Flood AdvisoryTBWPolk2 hr
Apr 19, 6:06 AM EDTSpecial Marine WarningTBW39 min
Apr 19, 6:36 AM EDTSpecial Weather StatementTBWHardee39 min
Apr 19, 6:44 AM EDTTornado WarningTBWHardee36 min
Apr 19, 7:19 AM EDTSpecial Weather StatementTBWHighlands41 min
Apr 19, 7:57 AM EDTAreal Flood AdvisoryTBWHardee, Highlands2 hr
Apr 19, 8:00 AM EDTSpecial Weather StatementTBWHighlands60 min
Apr 19, 10:36 AM EDTSpecial Weather StatementTBWCharlotte39 min
Apr 19, 2:22 PM EDTRip Current StatementTBWCharlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota30 hr
Apr 19, 3:00 PM EDTSpecial Weather StatementTBWHighlands30 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.