Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 52, NWS Mobile, AL

August 30, 2012Covington County, Alabama; Okaloosa County, Florida

NWS Mobile, AL issued this tornado warning at Aug 30, 2012, 4:32 AM CDT for Covington County, Alabama; Okaloosa County, Florida. It was in force for 28 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 30, 2012, 4:32 AM CDT (09:32 UTC)
Expired
Aug 30, 2012, 5:00 AM CDT
In force
28 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Covington County, AL, Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 83 km from the middle of the area, began a volume at 09:35 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 00:00Z, 9.5 hours before the alert went out and 233 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 00:00Z on 2012-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 2012-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
837 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
603 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.4

Open this sounding in Storm Lab

The text

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

693 
WFUS54 KMOB 300932
TORMOB
ALC039-FLC091-301000-
/O.NEW.KMOB.TO.W.0052.120830T0932Z-120830T1000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
432 AM CDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  SOUTHWESTERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 500 AM CDT

* AT 430 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 8 MILES NORTH OF CRESTVIEW...OR 7 MILES
  NORTHEAST OF BAKER...MOVING NORTH AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTH CENTRAL OKALOOSA COUNTY
  RURAL SOUTHWESTERN COVINGTON COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
STRONG ROTATION HAS BEEN DETECTED AND A TORNADO MAY ALREADY BE ON THE
GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

&&

LAT...LON 3083 8651 3083 8669 3099 8670 3100 8669
      3100 8670 3109 8670 3122 8670 3124 8648
TIME...MOT...LOC 0932Z 178DEG 28KT 3088 8659

$$
2 follow-up statements
701 
WWUS54 KMOB 300951
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
451 AM CDT THU AUG 30 2012

FLC091-301001-
/O.CAN.KMOB.TO.W.0052.000000T0000Z-120830T1000Z/
OKALOOSA FL-
451 AM CDT THU AUG 30 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL OKALOOSA
COUNTY...

AT 449 AM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTH CENTRAL
OKALOOSA COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE TORNADO 
WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

LAT...LON 3101 8654 3101 8667 3109 8668 3119 8668
      3120 8651
TIME...MOT...LOC 0951Z 178DEG 28KT 3103 8660

$$

ALC039-301000-
/O.CON.KMOB.TO.W.0052.000000T0000Z-120830T1000Z/
COVINGTON AL-
451 AM CDT THU AUG 30 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR
SOUTHWESTERN COVINGTON COUNTY...

AT 449 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 16 MILES WEST OF FLORALA...OR 9 MILES WEST OF LAUREL
HILL...MOVING NORTH AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTHWESTERN COVINGTON COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
STRONG ROTATION HAS BEEN DETECTED AND A TORNADO MAY ALREADY BE ON THE
GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

&&

LAT...LON 3101 8654 3101 8667 3109 8668 3119 8668
      3120 8651
TIME...MOT...LOC 0951Z 178DEG 28KT 3103 8660

$$
600 
WWUS54 KMOB 300956
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
456 AM CDT THU AUG 30 2012

ALC039-301006-
/O.EXP.KMOB.TO.W.0052.000000T0000Z-120830T1000Z/
COVINGTON AL-
456 AM CDT THU AUG 30 2012

...THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE FOR SOUTHWESTERN
COVINGTON COUNTY...

AT 456 AM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTHWESTERN
COVINGTON COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE
TORNADO WARNING WILL BE ALLOWED TO EXPIRE AT 500 AM CDT.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

LAT...LON 3101 8654 3101 8667 3109 8668 3119 8668
      3120 8651
TIME...MOT...LOC 0956Z 178DEG 28KT 3107 8660

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 7:27 PM CDTTornado WarningMOBMonroe, Wilcox30 min
Aug 29, 7:29 PM CDTSmall Craft AdvisoryMOB33 hr
Aug 29, 7:45 PM CDTCoastal Flood WarningMOB21 hr
Aug 30, 12:22 AM CDTFlash Flood WarningMOBMobile, Washington6 hr
Aug 30, 12:52 AM CDTWind AdvisoryMOBWashington16 hr
Aug 30, 2:28 AM CDTAreal Flood WarningMOBMobile, Washington12 hr
Aug 30, 2:46 AM CDTTornado WarningMOBCovington33 min
Aug 30, 3:53 AM CDTTornado WarningMOBCovington, Escambia37 min
Aug 30, 4:09 AM CDTTornado WarningMOBButler, Crenshaw16 min
Aug 30, 4:31 AM CDTTornado WarningMOBWashington29 min
Aug 30, 6:43 AM CDTTornado WarningMOBChoctaw, Washington37 min
Aug 30, 7:41 AM CDTTornado WarningMOBMobile33 min
Aug 30, 8:10 AM CDTTornado WarningMOBChoctaw, Washington35 min
Aug 30, 8:13 AM CDTTornado WarningMOBWashington32 min
Aug 30, 8:45 AM CDTTornado WarningMOBChoctaw, Washington45 min
Aug 30, 9:01 AM CDTTornado WarningMOBMobile, Washington44 min
Aug 30, 10:16 AM CDTTornado WarningMOBChoctaw, Washington44 min
Aug 30, 10:56 AM CDTTornado WarningMOBChoctaw49 min
Aug 30, 11:32 AM CDTSevere Thunderstorm WarningMOBMobile43 min
Aug 30, 11:44 AM CDTFlash Flood WarningMOBMobile, Washington6 hr
Aug 30, 11:56 AM CDTTornado WarningMOBChoctaw33 min
Aug 30, 4:29 PM CDTHigh Surf AdvisoryMOB20 hr

Nearby

Tornado Warnings in Alabama, 2012Tornado Warnings in Florida, 2012Every tornado warning in 2012Tornadoes in 2012

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.