Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 198, NWS Tallahassee, FL

July 28, 2021Holmes County, Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 28, 2021, 4:07 PM CDT for Holmes County, Walton County, Florida. It was in force for 16 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: Jul 28, 2021, 4:07 PM CDT (21:07 UTC)
Expired: Jul 28, 2021, 4:23 PM CDT
In force: 16 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Holmes County, FL, Walton County, FL

The radar

The Eglin Afb radar (KEVX), 19 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 169 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: 679 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 861 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

111 
WUUS52 KTAE 282107
SVRTAE
FLC059-131-282145-
/O.NEW.KTAE.SV.W.0198.210728T2107Z-210728T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
407 PM CDT Wed Jul 28 2021

The National Weather Service in Tallahassee has issued a

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

* Until 445 PM CDT.

* At 406 PM CDT, a severe thunderstorm was located 10 miles north of
  De Funiak Springs, moving south at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  De Funiak Springs, Eglin Air Force Base, Union, Liberty, Ponce De
  Leon, Oakwood Hills, Cluster Springs, Gaskin, Alpine Heights,
  Darlington, Arrant Settlement, De Funiak Spring Airport, Rock Hill,
  Glendale, Pleasant Ridge, Center Ridge, Knox Hill, Piney Grove,
  Argyle and Mossy Head.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3099 8616 3096 8596 3064 8591 3063 8592
      3062 8591 3062 8592 3061 8591 3059 8591
      3054 8617 3066 8638
TIME...MOT...LOC 2106Z 012DEG 19KT 3088 8609 

HAIL...0.75IN
WIND...60MPH
 
$$

21-WD

1 follow-up statement

577 
WWUS52 KTAE 282123
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
423 PM CDT Wed Jul 28 2021

FLC059-131-282133-
/O.CAN.KTAE.SV.W.0198.000000T0000Z-210728T2145Z/
Walton FL-Holmes FL-
423 PM CDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WALTON AND WESTERN
HOLMES COUNTIES 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.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3099 8616 3096 8596 3064 8591 3063 8592
      3062 8591 3062 8592 3061 8591 3059 8591
      3054 8617 3066 8638
TIME...MOT...LOC 2122Z 012DEG 19KT 3079 8611 

$$

21-WD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 4:07 AM CDT	Special Marine Warning	TAE		72 min
Jul 28, 12:40 PM CDT	Special Marine Warning	TAE		65 min
Jul 28, 12:43 PM CDT	Special Weather Statement	TAE	Dixie, Lafayette	62 min
Jul 28, 12:45 PM CDT	Special Weather Statement	TAE	Franklin	45 min
Jul 28, 1:02 PM CDT	Special Weather Statement	TAE	Franklin	43 min
Jul 28, 1:26 PM CDT	Special Weather Statement	TAE	Calhoun	64 min
Jul 28, 1:34 PM CDT	Heat Advisory	TAE	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 8 more	28 hr
Jul 28, 1:37 PM CDT	Special Marine Warning	TAE		55 min
Jul 28, 1:58 PM CDT	Special Weather Statement	TAE	Washington	62 min
Jul 28, 2:31 PM CDT	Special Weather Statement	TAE	Bay	59 min
Jul 28, 3:50 PM CDT	Special Weather Statement	TAE	Walton	40 min
Jul 28, 5:51 PM CDT	Areal Flood Advisory	TAE	Leon	114 min
Jul 28, 6:56 PM CDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	34 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.