Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 146, NWS Mobile, AL

July 27, 2012Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 27, 2012, 6:08 PM CDT for Okaloosa County, Florida. It was in force for 14 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: Jul 27, 2012, 6:08 PM CDT (23:08 UTC)
Expired: Jul 27, 2012, 6:22 PM CDT
In force: 14 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 58 km from the middle of the area, began a volume at 23:09 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, 11.1 hours before the alert went out and 210 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: 1865 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 102 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.

814 
WUUS54 KMOB 272308
SVRMOB
FLC091-272345-
/O.NEW.KMOB.SV.W.0146.120727T2308Z-120727T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
608 PM CDT FRI JUL 27 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...

* UNTIL 645 PM CDT

* AT 605 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS OVER 60 MPH WAS LOCATED 11 MILES SOUTHWEST OF FLORALA...OR 8
  MILES SOUTHEAST OF LAUREL HILL...AND MOVING EAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHEASTERN OKALOOSA COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3077 8638 3076 8639 3077 8650 3089 8651
      3095 8651 3097 8638
TIME...MOT...LOC 2308Z 266DEG 13KT 3086 8640

$$

1 follow-up statement

706 
WWUS54 KMOB 272322
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
622 PM CDT FRI JUL 27 2012

FLC091-272332-
/O.CAN.KMOB.SV.W.0146.000000T0000Z-120727T2345Z/
OKALOOSA FL-
622 PM CDT FRI JUL 27 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
NORTHEASTERN OKALOOSA COUNTY...

AT 619 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHEASTERN
OKALOOSA COUNTY HAS WEAKENED AND MOVED OUT OF THE COUNTY...THUS THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3077 8638 3076 8639 3077 8650 3089 8651
      3095 8651 3097 8638
TIME...MOT...LOC 2322Z 266DEG 13KT 3086 8634

$$

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every severe thunderstorm warning 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.