Alert archive / Florida / Tornado Warnings in 2009

Tornado Warning 53, NWS Mobile, AL

December 24, 2009Okaloosa County, Florida

NWS Mobile, AL issued this tornado warning at Dec 24, 2009, 7:48 PM CST for Okaloosa County, Florida. It was in force for 42 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: Dec 24, 2009, 7:48 PM CST (01:48 UTC)
Expired: Dec 24, 2009, 8:30 PM CST
In force: 42 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 59 km from the middle of the area, began a volume at 01:51 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
Dec 24, 5:37 PM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 1.8 hours before the alert went out and 215 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: 1 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 500 m²/s²
0-3 km storm-relative helicity: 677 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KMOB 250148
TORMOB
FLC091-250230-
/O.NEW.KMOB.TO.W.0053.091225T0148Z-091225T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
748 PM CST THU DEC 24 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  THIS INCLUDES THE CITIES OF...FORT WALTON BEACH...CRESTVIEW...

* UNTIL 830 PM CST

* AT 745 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE    
  OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING TORNADOS ALONG A      
  LINE EXTENDING FROM 11 MILES SOUTH OF HOLT TO OCEAN CITY.  THE     
  LINE OF STORMS IS MOVING NORTHEAST AT 35 MPH.

* THESE TORNADO PRODUCING STORMS WILL BE NEAR...
  VALPARAISO BY 800 PM CST...
  CRESTVIEW BY 815 PM CST...
  DEERLAND AND CRESTVIEW AIRPORT BY 825 PM CST...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A ROOM SUCH AS
A CLOSET OR BATHROOM. IF POSSIBLE...GET UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY
AND ALWAYS STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST FRIDAY MORNING FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3046 8652 3043 8655 3044 8658 3041 8657
      3061 8677 3098 8655 3078 8638 3060 8638
TIME...MOT...LOC 0147Z 211DEG 25KT 3058 8669 3045 8659

$$

2 follow-up statements

000 
WWUS54 KMOB 250207
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
807 PM CST THU DEC 24 2009

FLC091-250230-
/O.CON.KMOB.TO.W.0053.000000T0000Z-091225T0230Z/
OKALOOSA FL-
807 PM CST THU DEC 24 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CST FOR EASTERN
OKALOOSA COUNTY...

AT 805 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A
TORNADO.  THESE TORNADO PRODUCING STORMS WERE ALONG A LINE EXTENDING 
FROM FROM CRESTVIEW TO 8 MILES NORTH OF DESTIN...MOVING NORTHEAST 
AT 35 MPH.

TORNADO PRODUCING STORMS WILL BE NEAR...
  PEADEN...CRESTVIEW AIRPORT AND AUBURN BY 815 PM CST...
  CAMPTON BY 820 PM CST...
  DEERLAND BY 825 PM CST...
  DORCAS BY 830 PM CST...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST FRIDAY MORNING FOR
SOUTH CENTRAL ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3050 8648 3084 8663 3098 8655 3078 8638
      3060 8638
TIME...MOT...LOC 0207Z 211DEG 25KT 3082 8659 3053 8647

$$

000 
WWUS54 KMOB 250222
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
822 PM CST THU DEC 24 2009

FLC091-250231-
/O.EXP.KMOB.TO.W.0053.000000T0000Z-091225T0230Z/
OKALOOSA FL-
822 PM CST THU DEC 24 2009

...THE TORNADO WARNING FOR EASTERN OKALOOSA COUNTY WILL BE ALLOWED 
TO EXPIRE AT 830 PM CST...

THE STRONG THUNDERSTORMS ARE CURRENTLY MOVING EAST OF OKALOOSA 
COUNTY.  

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST FRIDAY MORNING FOR
SOUTH CENTRAL ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3050 8648 3084 8663 3098 8655 3078 8638
      3060 8638
TIME...MOT...LOC 0221Z 211DEG 25KT 3090 8653 3061 8641

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 24, 6:18 PM CST	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	57 min
Dec 24, 6:36 PM CST	Tornado Warning	MOB	Escambia, Okaloosa, Santa Rosa	54 min
Dec 24, 7:00 PM CST	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	60 min
Dec 24, 8:00 PM CST	Severe Thunderstorm Warning	MOB	Okaloosa	31 min
Dec 25, 5:50 AM CST	Fire Weather Watch	MOB		25 hr

Nearby

Tornado Warnings in Florida, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.