Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 9, NWS Mobile, AL

April 22, 2018Okaloosa County, Florida

NWS Mobile, AL issued this tornado warning at Apr 22, 2018, 3:23 PM CDT for Okaloosa 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: Apr 22, 2018, 3:23 PM CDT (20:23 UTC)
Expired: Apr 22, 2018, 3:39 PM CDT
In force: 16 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), 44 km from the middle of the area, began a volume at 20:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 22, 2:55 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.4 hours before the alert went out and 196 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

765 
WFUS54 KMOB 222023
TORMOB
FLC091-222100-
/O.NEW.KMOB.TO.W.0009.180422T2023Z-180422T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
323 PM CDT SUN APR 22 2018

The National Weather Service in Mobile has issued a

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

* Until 400 PM CDT.
    
* At 322 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 6 miles southeast of Destin, moving north at 25 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 tornadic thunderstorm will remain over mainly rural areas of
  southeastern Okaloosa County.

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 3043 8643 3044 8628 3040 8628 3039 8629
      3040 8629 3040 8630 3041 8630 3041 8631
      3042 8630 3042 8631 3038 8633 3040 8639
      3028 8639 3029 8647
TIME...MOT...LOC 2022Z 200DEG 21KT 3034 8641 

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

$$

1 follow-up statement

337 
WWUS54 KMOB 222039
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
339 PM CDT SUN APR 22 2018

FLC091-222049-
/O.CAN.KMOB.TO.W.0009.000000T0000Z-180422T2100Z/
Okaloosa FL-
339 PM CDT SUN APR 22 2018

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

A Tornado Watch remains in effect until 900 PM CDT for northwestern
Florida.

LAT...LON 3043 8643 3044 8628 3040 8628 3039 8629
      3040 8629 3040 8630 3041 8630 3041 8631
      3042 8630 3042 8631 3038 8633 3040 8639
      3028 8639 3029 8647
TIME...MOT...LOC 2038Z 200DEG 21KT 3043 8637 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 12:46 PM CDT	Special Weather Statement	MOB	Santa Rosa	29 min
Apr 22, 1:10 PM CDT	Special Weather Statement	MOB	Santa Rosa	35 min
Apr 22, 1:26 PM CDT	Tornado Warning	MOB	Santa Rosa	34 min
Apr 22, 3:25 PM CDT	Tornado Warning	MOB	Escambia	35 min
Apr 22, 3:49 PM CDT	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	41 min
Apr 22, 4:01 PM CDT	Tornado Warning	MOB	Escambia, Santa Rosa	29 min
Apr 22, 4:08 PM CDT	Tornado Warning	MOB	Okaloosa	37 min
Apr 22, 4:24 PM CDT	Severe Thunderstorm Warning	MOB	Santa Rosa	39 min
Apr 22, 4:31 PM CDT	Tornado Warning Tornado observed	MOB	Okaloosa	15 min

Nearby

Tornado Warnings in Florida, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.