Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 145, NWS Mobile, AL

June 15, 2021Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jun 15, 2021, 3:30 PM CDT for Okaloosa County, Florida. It was in force for 24 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: Jun 15, 2021, 3:30 PM CDT (20:30 UTC)
Expired: Jun 15, 2021, 3:54 PM CDT
In force: 24 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 66 km from the middle of the area, began a volume at 20:33 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, 8.5 hours before the alert went out and 218 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: 2073 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 942 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

140 
WUUS54 KMOB 152030
SVRMOB
FLC091-152115-
/O.NEW.KMOB.SV.W.0145.210615T2030Z-210615T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
330 PM CDT Tue Jun 15 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southern Okaloosa County in northwestern Florida...

* Until 415 PM CDT.

* At 330 PM CDT, a severe thunderstorm was located over Destin,
  moving southeast at 25 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wright, Fort Walton Beach, Destin, Eglin AFB, Mary Esther, Ocean
  City, Lake Lorraine, Shalimar and Cinco Bayou.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3046 8676 3049 8649 3043 8639 3030 8640
      3028 8651 3028 8671
TIME...MOT...LOC 2030Z 312DEG 22KT 3041 8653 

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

1 follow-up statement

648 
WWUS54 KMOB 152054
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
354 PM CDT Tue Jun 15 2021

FLC091-152104-
/O.CAN.KMOB.SV.W.0145.000000T0000Z-210615T2115Z/
Okaloosa FL-
354 PM CDT Tue Jun 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN OKALOOSA COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 3046 8676 3049 8649 3043 8639 3030 8640
      3028 8651 3028 8671
TIME...MOT...LOC 2052Z 312DEG 22KT 3031 8640 

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 1:32 PM CDT	Special Weather Statement	MOB	Escambia	28 min
Jun 15, 2:17 PM CDT	Special Weather Statement	MOB	Escambia	28 min
Jun 15, 2:20 PM CDT	Special Weather Statement	MOB	Okaloosa	25 min
Jun 15, 2:42 PM CDT	Special Weather Statement	MOB	Escambia	33 min
Jun 15, 2:45 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	45 min
Jun 15, 3:33 PM CDT	Areal Flood Advisory	MOB	Okaloosa	57 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.