Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 231, NWS Tallahassee, FL

August 29, 20214 counties in Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 29, 2021, 1:40 PM CDT for 4 counties in Florida. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 29, 2021, 1:40 PM CDT (18:40 UTC)
Expired
Aug 29, 2021, 2:30 PM CDT
In force
50 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Bay County, FL, Holmes County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 28 km from the middle of the area, began a volume at 18:40 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.

What was reported inside it

TimeReportWhereRemark
Aug 29, 2:07 PM CDTTSTM WND DMG1 Ne Seagrove Beach, FLREPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; POSSIBLE ROOF SHINGLES DAMAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.7 hours before the alert went out and 179 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 2021-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 912 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 2021-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 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
912 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
706 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

974 
WUUS52 KTAE 291840
SVRTAE
FLC005-059-131-133-291930-
/O.NEW.KTAE.SV.W.0231.210829T1840Z-210829T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
140 PM CDT Sun Aug 29 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Central Bay County in the Panhandle of Florida...
  Walton County in the Panhandle of Florida...
  Southwestern Holmes County in the Panhandle of Florida...
  Southern Washington County in the Panhandle of Florida...

* Until 230 PM CDT.

* At 139 PM CDT, severe thunderstorms were located along a line
  extending from 12 miles southwest of Santa Rosa Beach to 9 miles
  west of Panama City Beach to 15 miles west of Tyndall Air Force
  Base, moving north at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Panama City, Lynn Haven, Panama City Beach, Callaway, Vernon, Santa
  Rosa Beach, De Funiak Springs, Springfield, Hiland Park, Eglin Air
  Force Base, Tyndall Air Force Base, Union, Liberty, Live Oak,
  Parker, Freeport, Ponce De Leon, Westville, Ebro and Oakwood Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3038 8633 3042 8631 3040 8623 3041 8624
      3042 8626 3042 8625 3038 8617 3039 8611
      3044 8616 3047 8613 3046 8619 3050 8620
      3046 8639 3089 8639 3081 8597 3057 8554
      2992 8555 3022 8605 3030 8639 3040 8640
TIME...MOT...LOC 1839Z 175DEG 38KT 3022 8635 3019 8601 2999 8579 

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

$$

21-WD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 9:43 PM CDTSpecial Marine WarningTAE62 min
Aug 28, 9:47 PM CDTSpecial Marine WarningTAE88 min
Aug 28, 10:00 PM CDTTropical Storm WarningTAE17 hr
Aug 28, 11:00 PM CDTSpecial Weather StatementTAEFranklin, Gulf60 min
Aug 28, 11:10 PM CDTSpecial Marine WarningTAE50 min
Aug 28, 11:14 PM CDTSpecial Marine WarningTAE61 min
Aug 28, 11:18 PM CDTSevere Thunderstorm WarningTAEFranklin, Gulf, Liberty42 min
Aug 28, 11:55 PM CDTSpecial Weather StatementTAELiberty, Wakulla35 min
Aug 29, 12:02 AM CDTSpecial Marine WarningTAE88 min
Aug 29, 1:27 AM CDTSpecial Marine WarningTAE93 min
Aug 29, 2:11 AM CDTSpecial Marine WarningTAE34 min
Aug 29, 2:36 AM CDTCoastal Flood AdvisoryTAEBay, Franklin, Gulf, Jefferson, Wakulla, Walton25 hr
Aug 29, 2:54 AM CDTSpecial Marine WarningTAE51 min
Aug 29, 3:06 AM CDTSpecial Marine WarningTAE24 min
Aug 29, 5:26 AM CDTSpecial Marine WarningTAE52 min
Aug 29, 7:49 AM CDTSpecial Marine WarningTAE26 min
Aug 29, 8:18 AM CDTSpecial Marine WarningTAE42 min
Aug 29, 8:22 AM CDTSpecial Weather StatementTAEBay, Gulf38 min
Aug 29, 8:46 AM CDTSevere Thunderstorm WarningTAEGulf29 min
Aug 29, 8:53 AM CDTSpecial Marine WarningTAE37 min
Aug 29, 8:55 AM CDTSpecial Weather StatementTAEWalton50 min
Aug 29, 9:11 AM CDTSpecial Weather StatementTAEBay, Gulf34 min
Aug 29, 9:29 AM CDTSpecial Marine WarningTAE31 min
Aug 29, 9:46 AM CDTSpecial Weather StatementTAEHolmes29 min
Aug 29, 9:51 AM CDTSpecial Weather StatementTAEBay39 min
Aug 29, 10:22 AM CDTSpecial Weather StatementTAEHolmes, Washington38 min
Aug 29, 10:26 AM CDTSpecial Marine WarningTAE49 min
Aug 29, 10:59 AM CDTSpecial Weather StatementTAECalhoun, Holmes, Jackson31 min
Aug 29, 11:14 AM CDTSpecial Marine WarningTAE46 min
Aug 29, 12:49 PM CDTSpecial Marine WarningTAE86 min
Aug 29, 2:27 PM CDTSpecial Weather StatementTAEHolmes, Jackson, Walton, Washington48 min
Aug 29, 3:51 PM CDTSpecial Weather StatementTAETaylor39 min
Aug 29, 4:06 PM CDTAreal Flood AdvisoryTAEBay, Walton, Washington114 min
Aug 29, 4:10 PM CDTSpecial Weather StatementTAEWashington35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.