Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 130, NWS Tallahassee, FL

May 12, 2021Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at May 12, 2021, 6:58 AM CDT for Walton County, Florida. It was in force for 47 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, 6:58 AM CDT (11:58 UTC)
Expired
May 12, 2021, 7:45 AM CDT
In force
47 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 29 km from the middle of the area, began a volume at 11:58 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 12.0 hours before the alert went out and 184 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, Tallahassee Rgnl, FL at 00:00Z on 2021-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1708 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, Tallahassee Rgnl, FL at 00:00Z on 2021-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
1708 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
617 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

317 
WUUS52 KTAE 121158
SVRTAE
FLC131-121245-
/O.NEW.KTAE.SV.W.0130.210512T1158Z-210512T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
658 AM CDT Wed May 12 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Walton County in the Panhandle of Florida...

* Until 745 AM CDT.

* At 657 AM CDT, severe thunderstorms were located along a line
  extending from 7 miles northeast of Baker to near Crestview to 6
  miles north of Wright to 12 miles south of Navarre Beach, moving
  east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Santa Rosa Beach, De Funiak Springs, Eglin Air Force Base, Union,
  Liberty, Freeport, Pond Creek, Oakwood Hills, Cluster Springs,
  Portland, Alpine Heights, Villa Tasso, Blue Mountain Beach, De
  Funiak Spring Airport, Seaside, Rock Hill, Glendale, Pleasant
  Ridge, Center Ridge and Gulf Pines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3040 8639 3038 8633 3042 8631 3039 8626
      3042 8627 3038 8611 3039 8611 3044 8616
      3047 8613 3046 8619 3050 8620 3046 8639
      3088 8639 3089 8604 3071 8604 3070 8600
      3067 8600 3024 8614 3030 8639
TIME...MOT...LOC 1157Z 256DEG 32KT 3085 8657 3067 8658 3055 8662 3020
8684

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

25-CAMP

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 7:54 PM CDTSpecial Weather StatementTAEJefferson36 min
May 11, 8:30 PM CDTSpecial Weather StatementTAEJefferson, Madison60 min
May 11, 9:58 PM CDTSpecial Weather StatementTAELafayette62 min
May 12, 6:30 AM CDTSpecial Weather StatementTAEWalton60 min
May 12, 6:52 AM CDTSevere Thunderstorm WarningTAEWalton38 min
May 12, 7:00 AM CDTSpecial Marine WarningTAE60 min
May 12, 7:21 AM CDTSevere Thunderstorm WarningTAEBay, Holmes, Walton, Washington54 min
May 12, 7:45 AM CDTSevere Thunderstorm WarningTAEWalton30 min
May 12, 8:15 AM CDTSpecial Weather StatementTAEHolmes, Jackson, Washington45 min
May 12, 8:48 AM CDTSpecial Weather StatementTAECalhoun, Jackson42 min
May 12, 9:10 AM CDTSpecial Marine WarningTAE65 min
May 12, 9:37 AM CDTSpecial Weather StatementTAEWashington38 min
May 12, 10:12 AM CDTSpecial Marine WarningTAE33 min
May 12, 10:37 AM CDTSpecial Weather StatementTAEBay53 min
May 12, 10:47 AM CDTSpecial Marine WarningTAE58 min
May 12, 11:06 AM CDTSpecial Weather StatementTAELiberty39 min
May 12, 11:27 AM CDTSevere Thunderstorm WarningTAELeon, Liberty, Wakulla48 min
May 12, 12:06 PM CDTSpecial Marine WarningTAE114 min
May 12, 12:07 PM CDTSevere Thunderstorm WarningTAEFranklin, Liberty, Wakulla38 min
May 12, 12:18 PM CDTSpecial Weather StatementTAEJefferson42 min
May 12, 12:58 PM CDTSpecial Weather StatementTAEJefferson, Madison47 min
May 12, 1:32 PM CDTSpecial Weather StatementTAEMadison28 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.