Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 135, NWS Tallahassee, FL

May 12, 2021Leon County, Liberty County, Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at May 12, 2021, 12:27 PM EDT for Leon County, Liberty County, Wakulla County, Florida. It was in force for 48 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 12, 2021, 12:27 PM EDT (16:27 UTC)
Expired: May 12, 2021, 1:15 PM EDT
In force: 48 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Leon County, FL, Liberty County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 42 km from the middle of the area, began a volume at 16:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 12, 8:14 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.5 hours before the alert went out and 45 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: 263 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1066 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

228 
WUUS52 KTAE 121627
SVRTAE
FLC073-077-129-121715-
/O.NEW.KTAE.SV.W.0135.210512T1627Z-210512T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
1227 PM EDT Wed May 12 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wakulla County in Big Bend of Florida...
  Central Liberty County in Big Bend of Florida...
  Southwestern Leon County in Big Bend of Florida...

* Until 115 PM EDT.

* At 1227 PM EDT, a severe thunderstorm was located 17 miles
  southeast of Blountstown, moving east at 35 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...
  Crawfordville, East Camp, Jewel Fire Tower, Brown House, Leon
  Sinks, Vilas, Arran, Jensen Place, Hilliardville, Central City,
  Tully, Clio, Poplar Camp, Smith Creek, Nixon Garden and Helen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3014 8496 3033 8497 3037 8434 3010 8434
TIME...MOT...LOC 1627Z 269DEG 29KT 3023 8487 

HAIL...1.00IN
WIND...60MPH
 
$$

25-CAMP

1 follow-up statement

999 
WWUS52 KTAE 121702
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
102 PM EDT Wed May 12 2021

FLC077-121711-
/O.CAN.KTAE.SV.W.0135.000000T0000Z-210512T1715Z/
Liberty FL-
102 PM EDT Wed May 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LIBERTY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 PM EDT for
Big Bend of Florida.

LAT...LON 3012 8466 3013 8467 3017 8467 3019 8468
      3022 8468 3023 8470 3025 8470 3025 8471
      3026 8474 3028 8473 3029 8473 3032 8470
      3036 8434 3010 8434
TIME...MOT...LOC 1701Z 268DEG 28KT 3024 8458 

$$

FLC073-129-121715-
/O.CON.KTAE.SV.W.0135.000000T0000Z-210512T1715Z/
Wakulla FL-Leon FL-
102 PM EDT Wed May 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR NORTHWESTERN WAKULLA AND SOUTHWESTERN LEON COUNTIES...

At 101 PM EDT, a severe thunderstorm was located 14 miles west of
Crawfordville, moving east at 30 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...
Crawfordville, Smith Creek, Brown House, Leon Sinks, Arran,
Hilliardville, Helen and Tully.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3012 8466 3013 8467 3017 8467 3019 8468
      3022 8468 3023 8470 3025 8470 3025 8471
      3026 8474 3028 8473 3029 8473 3032 8470
      3036 8434 3010 8434
TIME...MOT...LOC 1701Z 268DEG 28KT 3024 8458 

HAIL...1.00IN
WIND...60MPH
 
$$

25-CAMP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 8:54 PM EDT	Special Weather Statement	TAE	Jefferson	36 min
May 11, 9:30 PM EDT	Special Weather Statement	TAE	Jefferson, Madison	60 min
May 11, 10:58 PM EDT	Special Weather Statement	TAE	Lafayette	62 min
May 12, 7:30 AM EDT	Special Weather Statement	TAE	Walton	60 min
May 12, 7:52 AM EDT	Severe Thunderstorm Warning	TAE	Walton	38 min
May 12, 7:58 AM EDT	Severe Thunderstorm Warning	TAE	Walton	47 min
May 12, 8:00 AM EDT	Special Marine Warning	TAE		60 min
May 12, 8:21 AM EDT	Severe Thunderstorm Warning	TAE	Bay, Holmes, Walton, Washington	54 min
May 12, 8:45 AM EDT	Severe Thunderstorm Warning	TAE	Walton	30 min
May 12, 9:15 AM EDT	Special Weather Statement	TAE	Holmes, Jackson, Washington	45 min
May 12, 9:48 AM EDT	Special Weather Statement	TAE	Calhoun, Jackson	42 min
May 12, 10:10 AM EDT	Special Marine Warning	TAE		65 min
May 12, 10:37 AM EDT	Special Weather Statement	TAE	Washington	38 min
May 12, 11:12 AM EDT	Special Marine Warning	TAE		33 min
May 12, 11:37 AM EDT	Special Weather Statement	TAE	Bay	53 min
May 12, 11:47 AM EDT	Special Marine Warning	TAE		58 min
May 12, 12:06 PM EDT	Special Weather Statement	TAE	Liberty	39 min
May 12, 1:06 PM EDT	Special Marine Warning	TAE		114 min
May 12, 1:07 PM EDT	Severe Thunderstorm Warning	TAE	Franklin, Liberty, Wakulla	38 min
May 12, 1:18 PM EDT	Special Weather Statement	TAE	Jefferson	42 min
May 12, 1:58 PM EDT	Special Weather Statement	TAE	Jefferson, Madison	47 min
May 12, 2:32 PM EDT	Special Weather Statement	TAE	Madison	28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.