Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

December 11, 2021Crenshaw County, Alabama

NWS Mobile, AL issued this special weather statement at Dec 11, 2021, 11:21 AM CST for Crenshaw 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
Dec 11, 2021, 11:21 AM CST (17:21 UTC)
Expired
Dec 11, 2021, 12:00 PM CST
In force
39 min
Issued by
NWS Mobile, AL
Hail
0.00 in
Wind
40

County Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 95 km from the middle of the area, began a volume at 17:22 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, 5.4 hours before the alert went out and 165 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 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 245 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, Birmingham, AL at 12:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 325 square meters per square second.1939587897Sfc1 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
245 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
325 m²/s²
0-3 km storm-relative helicity
371 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.8

Open this sounding in Storm Lab

The text

As transmitted.

551 
WWUS84 KMOB 111721
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
1121 AM CST Sat Dec 11 2021
 
ALZ057-058-111800-
Butler AL-Crenshaw AL-
1121 AM CST Sat Dec 11 2021

...A strong thunderstorm will impact portions of east central Butler
and central Crenshaw Counties through NOON CST...

At 1120 AM CST, National Weather Service doppler radar indicated a
strong thunderstorm 8 miles east of Georgiana, or 11 miles south of
Greenville, moving northeast at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Luverne and Rutledge. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3163 8660 3169 8667 3185 8635 3185 8626
      3177 8619 3171 8621
TIME...MOT...LOC 1720Z 245DEG 25KT 3167 8660 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Black

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 11, 9:55 AM CSTTornado WarningMOBButler, Crenshaw50 min
Dec 11, 12:56 PM CSTSpecial Weather StatementMOBCrenshaw49 min
Dec 11, 1:21 PM CSTSpecial Weather StatementMOBCovington39 min
Dec 11, 2:20 PM CSTSpecial Weather StatementMOBCovington40 min
Dec 11, 10:53 AM CSTSpecial Weather StatementMOBGeorge52 min

Nearby

Special Weather Statements in Alabama, 2021Every special weather statement in 2021

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.