Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 30, NWS Mobile, AL

March 9, 2011Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Mar 9, 2011, 11:10 AM CST for Okaloosa County, Florida. It was in force for 65 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
Mar 9, 2011, 11:10 AM CST (17:10 UTC)
Expired
Mar 9, 2011, 12:15 PM CST
In force
65 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 17:11 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.

IssuedProductOfficeLasted
Mar 9, 7:26 AM CSTTornado WatchSPC6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.2 hours before the alert went out and 213 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 12:00Z on 2011-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2011-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 348 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
348 m²/s²
0-3 km storm-relative helicity
471 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.

276 
WUUS54 KMOB 091710
SVRMOB
FLC091-091815-
/O.NEW.KMOB.SV.W.0030.110309T1710Z-110309T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1110 AM CST WED MAR 9 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  THIS INCLUDES THE CITIES OF...LAKE LORRAINE...WRIGHT...
  VALPARAISO...OCEAN CITY...NICEVILLE...MARY ESTHER...FORT WALTON
  BEACH...EGLIN AFB...DESTIN...

* UNTIL 1215 PM CST

* AT 1106 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM CRESTVIEW TO 11 MILES NORTHWEST OF VALPARAISO...AND MOVING
  EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  VALPARAISO AROUND 1115 AM CST...
  DESTIN AND NICEVILLE AROUND 1120 AM CST...
  SEMINOLE AROUND 1125 AM CST...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 57 AND 67.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

&&

LAT...LON 3040 8679 3052 8678 3088 8640 3088 8638
      3046 8638 3046 8642 3049 8645 3047 8648
      3046 8653 3043 8655 3044 8658 3042 8657
      3041 8652 3043 8646 3041 8639 3039 8638
TIME...MOT...LOC 1710Z 282DEG 45KT 3074 8648 3060 8659

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 9, 9:02 AM CSTSevere Thunderstorm WarningMOBEscambia, Santa Rosa58 min
Mar 9, 9:10 AM CSTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa65 min
Mar 9, 9:10 AM CSTTornado WarningMOBEscambia50 min
Mar 9, 9:16 AM CSTTornado WarningMOBEscambia44 min
Mar 9, 9:25 AM CSTFlash Flood WarningMOBEscambia, Santa Rosa6 hr
Mar 9, 9:26 AM CSTTornado WarningMOBEscambia, Santa Rosa49 min
Mar 9, 9:40 AM CSTTornado WarningMOBEscambia, Santa Rosa50 min
Mar 9, 10:09 AM CSTSevere Thunderstorm WarningMOBEscambia, Okaloosa, Santa Rosa66 min
Mar 9, 10:17 AM CSTFlash Flood WarningMOBSanta Rosa6 hr
Mar 9, 10:30 AM CSTTornado WarningMOBOkaloosa, Santa Rosa32 min
Mar 9, 11:03 AM CSTFlash Flood WarningMOBOkaloosa5 hr
Mar 9, 11:14 AM CSTTornado WarningMOBEscambia, Santa Rosa61 min
Mar 9, 11:41 AM CSTTornado WarningMOBOkaloosa26 min
Mar 9, 11:48 AM CSTFlash Flood WarningMOBOkaloosa, Santa Rosa4 hr
Mar 9, 12:16 PM CSTTornado WarningMOBOkaloosa, Santa Rosa26 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning 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.