Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 133, NWS Mobile, AL

September 5, 2011Okaloosa County, Florida

NWS Mobile, AL issued this tornado warning at Sep 5, 2011, 9:16 AM CDT for Okaloosa County, Florida. It was in force for 44 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: Sep 5, 2011, 9:16 AM CDT (14:16 UTC)
Expired: Sep 5, 2011, 10:00 AM CDT
In force: 44 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 53 km from the middle of the area, began a volume at 14:19 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
Sep 5, 5:35 AM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 2.3 hours before the alert went out and 206 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: 2763 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 465 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 266 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 17.8

Open this sounding in Storm Lab

The text

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

442 
WFUS54 KMOB 051416
TORMOB
FLC091-051500-
/O.NEW.KMOB.TO.W.0133.110905T1416Z-110905T1500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
916 AM CDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  OKALOOSA COUNTY IN NORTHWEST FLORIDA...

* UNTIL 1000 AM CDT

* AT 914 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO ALONG A
  LINE EXTENDING FROM 12 MILES NORTH OF CRESTVIEW TO 3 MILES
  NORTHWEST OF MARY ESTHER...MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHALIMAR...           OCEAN CITY...         LAKE LORRAINE...
  CINCO BAYOU...        WRIGHT...             VALPARAISO...
  NICEVILLE...          MARY ESTHER...        LAUREL HILL...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 46 AND 67.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MANUFACTURED HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3040 8651 3042 8649 3042 8644 3045 8643
      3048 8645 3042 8655 3043 8658 3040 8658
      3042 8678 3100 8669 3099 8639 3045 8639
      3042 8644 3041 8640 3039 8639
TIME...MOT...LOC 1416Z 261DEG 43KT 3096 8652 3045 8667

$$

1 follow-up statement

421 
WWUS54 KMOB 051449
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
949 AM CDT MON SEP 5 2011

FLC091-051500-
/O.CON.KMOB.TO.W.0133.000000T0000Z-110905T1500Z/
OKALOOSA FL-
949 AM CDT MON SEP 5 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 AM CDT FOR OKALOOSA
COUNTY...

AT 947 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF TORNADO PRODUCING STORMS.  THESE TORNADO PRODUCING
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM OKALOO TO EGLIN
AFB...OR ALONG A LINE EXTENDING FROM 7 MILES NORTH OF CRESTVIEW TO
EGLIN AFB...MOVING NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
VALPARAISO...POSTIL...NICEVILLE...DANA POINT...LAUREL HILL...
SEMINOLE...CRESTVIEW AIRPORT...KILLINGSWORTH CROSSROADS...SVEA...
DORCAS AND DEERLAND

IN ADDITION TO THE TORNADO THREAT...TORRENTIAL RAINFALL CONTINUES TO 
FALL AS A RESULT OF THESE STORMS.  FLASH FLOODING IS A MAJOR THREAT 
WITH THESE STORMS.  PLEASE TAKE COVER IF YOU ARE IN THE PATH OF 
THESE STORMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3042 8644 3040 8639 3039 8640 3040 8651
      3042 8649 3042 8644 3045 8643 3048 8645
      3042 8655 3043 8658 3040 8658 3042 8677
      3099 8669 3099 8639 3045 8639
TIME...MOT...LOC 1448Z 218DEG 27KT 3089 8647 3059 8666

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 9:12 PM CDT	Tornado Warning	MOB	Escambia, Santa Rosa	63 min
Sep 4, 9:58 PM CDT	High Wind Warning	MOB		21 hr
Sep 4, 9:58 PM CDT	Wind Advisory	MOB		24 hr
Sep 4, 10:24 PM CDT	Coastal Flood Advisory	MOB		15 hr
Sep 4, 10:24 PM CDT	Rip Current Statement	MOB		21 hr
Sep 4, 10:24 PM CDT	High Surf Advisory	MOB		21 hr
Sep 4, 11:53 PM CDT	Tornado Warning	MOB	Santa Rosa	67 min
Sep 5, 1:07 AM CDT	Tornado Warning	MOB	Escambia, Santa Rosa	53 min
Sep 5, 2:24 AM CDT	River Flood Warning	MOB	Escambia	15 hr
Sep 5, 5:11 AM CDT	Tornado Warning	MOB	Okaloosa	64 min
Sep 5, 7:23 AM CDT	Areal Flood Warning	MOB	Escambia, Okaloosa, Santa Rosa	12 hr
Sep 5, 8:40 AM CDT	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	65 min
Sep 5, 9:56 AM CDT	Tornado Warning	MOB	Escambia	34 min
Sep 5, 9:59 AM CDT	Tornado Warning	MOB	Okaloosa	61 min
Sep 5, 10:35 AM CDT	Tornado Warning	MOB	Escambia	40 min
Sep 5, 10:39 AM CDT	Flash Flood Warning	MOB	Okaloosa	111 min
Sep 5, 10:58 AM CDT	Tornado Warning	MOB	Okaloosa	62 min
Sep 5, 12:54 PM CDT	Coastal Flood Warning	MOB		6 hr
Sep 5, 1:14 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	39 min

Nearby

Tornado Warnings in Florida, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.