Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS Tallahassee, FL

May 12, 2021Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at May 12, 2021, 7:45 AM CDT for Walton County, Florida. It was in force for 30 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, 7:45 AM CDT (12:45 UTC)
Expired
May 12, 2021, 8:15 AM CDT
In force
30 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), 37 km from the middle of the area, began a volume at 12:47 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.

IssuedProductOfficeLasted
May 12, 7:14 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.8 hours before the alert went out and 192 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 12:00Z on 2021-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 263 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 12:00Z on 2021-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 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
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.

156 
WUUS52 KTAE 121245
SVRTAE
FLC131-121315-
/O.NEW.KTAE.SV.W.0132.210512T1245Z-210512T1315Z/

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

The National Weather Service in Tallahassee has issued a

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

* Until 815 AM CDT.

* At 745 AM CDT, severe thunderstorms were located along a line
  extending from 6 miles east of Eglin Air Force Base to near Destin,
  moving northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Eglin Air Force Base, Gulf Pines, New Home, Pleasant Ridge,
  Sandestin and Miramar Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3039 8639 3040 8638 3064 8639 3069 8632
      3070 8612 3061 8614 3048 8624 3049 8626
      3047 8630 3043 8631 3041 8630 3030 8639
TIME...MOT...LOC 1245Z 241DEG 40KT 3063 8617 3039 8643 

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, 6:58 AM CDTSevere Thunderstorm WarningTAEWalton47 min
May 12, 7:00 AM CDTSpecial Marine WarningTAE60 min
May 12, 7:21 AM CDTSevere Thunderstorm WarningTAEBay, Holmes, Walton, Washington54 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.