Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 202, NWS Mobile, AL

August 22, 2011Escambia County, Florida; Escambia County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 22, 2011, 6:36 PM CDT for Escambia County, Florida; Escambia County, Alabama. It was in force for 39 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 22, 2011, 6:36 PM CDT (23:36 UTC)
Expired
Aug 22, 2011, 7:15 PM CDT
In force
39 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Escambia County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 75 km from the middle of the area, began a volume at 23:39 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.6 hours before the alert went out and 222 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, Slidell Radar S, LA at 12:00Z on 2011-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2680 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2011-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
2680 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
812 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
66 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.

350 
WUUS54 KMOB 222336
SVRMOB
ALC053-FLC033-230015-
/O.NEW.KMOB.SV.W.0202.110822T2336Z-110823T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
636 PM CDT MON AUG 22 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  SOUTHWESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 715 PM CDT

* AT 634 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR ATMORE...OR 6 MILES
  SOUTHEAST OF I65 AND CR 1...AND MOVING SOUTH AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  POARCH CREEK RESERVATION...                 CENTURY...
  I65 AND CR 1...       I65 AND AL 21...      ATMORE...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 48 AND 60.

&&

LAT...LON 3090 8761 3092 8761 3095 8759 3099 8759
      3101 8762 3114 8760 3112 8730 3087 8731
TIME...MOT...LOC 2336Z 006DEG 10KT 3101 8747

$$
1 follow-up statement
423 
WWUS54 KMOB 230007
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
707 PM CDT MON AUG 22 2011

ALC053-FLC033-230016-
/O.EXP.KMOB.SV.W.0202.000000T0000Z-110823T0015Z/
ESCAMBIA AL-ESCAMBIA FL-
707 PM CDT MON AUG 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ESCAMBIA AND
SOUTHWESTERN ESCAMBIA COUNTIES WILL EXPIRE AT 715 PM CDT...

THE STORM HAS MOVED OVER NORTHERN ESCAMBIA COUNTY...FLORIDA AND IS 
CURRENTLY BEING HANDLE BY SEVERE THUNDERSTORM WARNING NUMBER 203.

LAT...LON 3090 8761 3092 8761 3095 8759 3099 8759
      3101 8762 3114 8760 3112 8730 3087 8731
TIME...MOT...LOC 0006Z 006DEG 10KT 3093 8748

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 6:55 PM CDTSevere Thunderstorm WarningMOBEscambia38 min
Aug 21, 7:48 PM CDTSevere Thunderstorm WarningMOBButler42 min
Aug 22, 5:04 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia25 min
Aug 22, 5:20 PM CDTSevere Thunderstorm WarningMOBMonroe25 min
Aug 22, 5:39 PM CDTSevere Thunderstorm WarningMOBButler31 min
Aug 22, 5:53 PM CDTSpecial Marine WarningMOB52 min
Aug 22, 6:00 PM CDTSevere Thunderstorm WarningMOBEscambia, Monroe45 min
Aug 22, 6:21 PM CDTSevere Thunderstorm WarningMOBBaldwin16 min
Aug 22, 6:54 PM CDTSpecial Marine WarningMOB51 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Severe Thunderstorm Warnings in Alabama, 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.