Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 218, NWS Tallahassee, FL

August 14, 2021Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 14, 2021, 3:53 PM EDT for Wakulla 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
Aug 14, 2021, 3:53 PM EDT (19:53 UTC)
Expired
Aug 14, 2021, 4:23 PM EDT
In force
30 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 27 km from the middle of the area, began a volume at 19:56 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 12:00Z, 7.9 hours before the alert went out and 29 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 2021-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 695 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 2021-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 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
695 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1064 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

967 
WUUS52 KTAE 141953
SVRTAE
FLC129-142045-
/O.NEW.KTAE.SV.W.0218.210814T1953Z-210814T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
353 PM EDT Sat Aug 14 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Central Wakulla County in Big Bend of Florida...

* Until 445 PM EDT.

* At 353 PM EDT, a severe thunderstorm was located near
  Crawfordville, moving southwest at 10 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Crawfordville, Sopchoppy, Bethel, Buckhorn and Arran. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3018 8465 3030 8448 3030 8445 3025 8431
      3003 8444
TIME...MOT...LOC 1953Z 030DEG 7KT 3022 8441 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

55-SCHOLL
1 follow-up statement
830 
WWUS52 KTAE 142023
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
423 PM EDT Sat Aug 14 2021

FLC129-142033-
/O.CAN.KTAE.SV.W.0218.000000T0000Z-210814T2045Z/
Wakulla FL-
423 PM EDT Sat Aug 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WAKULLA COUNTY IS
CANCELLED...
                
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 has been cancelled.

LAT...LON 3018 8465 3030 8448 3030 8445 3025 8431
      3003 8444
TIME...MOT...LOC 2021Z 030DEG 7KT 3017 8444 

$$

55-SCHOLL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:17 PM EDTSpecial Weather StatementTAEWakulla28 min
Aug 13, 10:15 PM EDTSpecial Marine WarningTAE92 min
Aug 14, 3:23 PM EDTSpecial Weather StatementTAEGulf37 min
Aug 14, 3:32 PM EDTSpecial Weather StatementTAEWakulla43 min
Aug 14, 3:59 PM EDTSpecial Weather StatementTAEGulf46 min
Aug 14, 4:12 PM EDTSpecial Weather StatementTAELiberty33 min
Aug 14, 4:24 PM EDTSpecial Weather StatementTAEWakulla36 min
Aug 14, 4:48 PM EDTSpecial Weather StatementTAECalhoun, Liberty27 min
Aug 14, 4:58 PM EDTSpecial Weather StatementTAEFranklin47 min
Aug 14, 5:01 PM EDTSpecial Weather StatementTAEWashington29 min
Aug 14, 5:20 PM EDTSmall Craft AdvisoryTAE12 hr
Aug 14, 5:23 PM EDTSpecial Weather StatementTAEWalton52 min
Aug 14, 5:25 PM EDTSpecial Weather StatementTAEBay, Calhoun50 min
Aug 14, 5:40 PM EDTSevere Thunderstorm WarningTAEBay, Walton, Washington35 min
Aug 14, 5:44 PM EDTSpecial Marine WarningTAE61 min
Aug 14, 6:14 PM EDTSpecial Weather StatementTAEWalton31 min
Aug 14, 6:42 PM EDTSpecial Marine WarningTAE33 min
Aug 14, 6:55 PM EDTSpecial Weather StatementTAEWakulla35 min
Aug 14, 7:09 PM EDTSpecial Marine WarningTAE66 min
Aug 14, 7:23 PM EDTSpecial Weather StatementTAEWakulla37 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.