Alert archive / Florida / Tornado Warnings in 2021

Tornado Warning 46, NWS Mobile, AL

August 20, 2021Okaloosa County, Florida

NWS Mobile, AL issued this tornado warning at Aug 20, 2021, 2:06 PM CDT for Okaloosa County, Florida. It was in force for 21 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 20, 2021, 2:06 PM CDT (19:06 UTC)
Expired: Aug 20, 2021, 2:27 PM CDT
In force: 21 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 74 km from the middle of the area, began a volume at 19:09 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, 7.1 hours before the alert went out and 229 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: 675 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

665 
WFUS54 KMOB 201906
TORMOB
FLC091-201945-
/O.NEW.KMOB.TO.W.0046.210820T1906Z-210820T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
206 PM CDT Fri Aug 20 2021

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Northern Okaloosa County in northwestern Florida...

* Until 245 PM CDT.
    
* At 206 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 6 miles northwest of Baker, or 12 miles northwest of
  Crestview, moving southeast at 10 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Baker around 230 PM CDT.
  Crestview around 245 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3065 8655 3079 8679 3092 8679 3098 8676
      3090 8642
TIME...MOT...LOC 1906Z 294DEG 10KT 3087 8673 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

1 follow-up statement

794 
WWUS54 KMOB 201927
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
227 PM CDT Fri Aug 20 2021

FLC091-201936-
/O.CAN.KMOB.TO.W.0046.000000T0000Z-210820T1945Z/
Okaloosa FL-
227 PM CDT Fri Aug 20 2021

...THE TORNADO WARNING FOR NORTHERN OKALOOSA COUNTY IS CANCELLED...
                
The storm which prompted the warning no longer appears capable of
producing a tornado. Therefore, the warning has been cancelled. 
However gusty winds are still possible with this thunderstorm.

Remember, a Severe Thunderstorm Warning still remains in effect for
Okaloosa county until 330 PM CDT.

LAT...LON 3065 8655 3079 8679 3092 8679 3098 8676
      3090 8642
TIME...MOT...LOC 1921Z 294DEG 10KT 3085 8667 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 12:37 PM CDT	Special Weather Statement	MOB	Escambia	38 min
Aug 20, 1:04 PM CDT	Areal Flood Advisory	MOB	Escambia	3 hr
Aug 20, 1:51 PM CDT	Special Weather Statement	MOB	Okaloosa	39 min
Aug 20, 2:25 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa	36 min
Aug 20, 2:40 PM CDT	Areal Flood Advisory	MOB	Okaloosa, Santa Rosa	3 hr

Nearby

Tornado Warnings in Florida, 2021 Every tornado warning in 2021 Tornadoes 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.