Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 200, NWS Mobile, AL

August 22, 2011Escambia County, Monroe County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 22, 2011, 6:00 PM CDT for Escambia County, Monroe County, Alabama. It was in force for 45 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, 6:00 PM CDT (23:00 UTC)
Expired
Aug 22, 2011, 6:45 PM CDT
In force
45 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Escambia County, AL, Monroe County, AL

The radar

The Mobile radar (KMOB), 94 km from the middle of the area, began a volume at 23:03 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

Birmingham, AL (KBMX), launched 12:00Z, 11.0 hours before the alert went out and 226 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, Birmingham, AL at 12:00Z on 2011-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2770 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, Birmingham, AL at 12:00Z on 2011-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
2770 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

395 
WUUS54 KMOB 222300
SVRMOB
ALC053-099-222345-
/O.NEW.KMOB.SV.W.0200.110822T2300Z-110822T2345Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHWESTERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 645 PM CDT

* AT 558 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 9 MILES SOUTHWEST OF FRISCO
  CITY...OR 6 MILES SOUTHWEST OF MEGARGEL...AND MOVING SOUTH AT 25
  MPH.

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

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 48 AND 66.

&&

LAT...LON 3124 8762 3125 8763 3140 8764 3143 8743
      3130 8739 3126 8743 3126 8737 3105 8730
      3102 8761
TIME...MOT...LOC 2300Z 352DEG 22KT 3132 8752

$$
1 follow-up statement
459 
WWUS54 KMOB 222322
SVSMOB

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

ALC053-099-222345-
/O.CON.KMOB.SV.W.0200.000000T0000Z-110822T2345Z/
ESCAMBIA AL-MONROE AL-
622 PM CDT MON AUG 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHWESTERN MONROE AND WESTERN ESCAMBIA COUNTIES...

AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR HUXFORD...OR 11 MILES
NORTH OF ATMORE...MOVING SOUTH AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JACK
SPRINGS...MCCULLOUGH...POARCH...STANLEY CROSSROADS...SARDINE...I65
AND AL 21...POARCH CREEK RESERVATION...LITTLE ROCK...EWING FARMS...
MOUNT GILLIS...MARTINVILLE...I65 AND CR 1...FREEMANVILLE...PLEASANT
HILL AND ROBINSONVILLE

LAT...LON 3124 8762 3125 8763 3127 8763 3134 8763
      3135 8740 3130 8739 3126 8743 3126 8737
      3105 8730 3102 8761
TIME...MOT...LOC 2322Z 352DEG 22KT 3119 8750

$$

The office that day

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

IssuedProductOfficeCountiesLasted
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, 6:21 PM CDTSevere Thunderstorm WarningMOBBaldwin16 min
Aug 22, 6:36 PM CDTSevere Thunderstorm WarningMOBEscambia39 min
Aug 22, 6:54 PM CDTSpecial Marine WarningMOB51 min
Aug 22, 6:55 PM CDTSevere Thunderstorm WarningMOBBaldwin38 min

Nearby

Severe 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.