Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 33, NWS Mobile, AL

March 22, 2012Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 22, 2012, 11:00 AM CDT for Choctaw 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: Mar 22, 2012, 11:00 AM CDT (16:00 UTC)
Expired: Mar 22, 2012, 11:45 AM CDT
In force: 45 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Choctaw County, AL

The radar

The Birmingham radar (KBMX), 157 km from the middle of the area, began a volume at 16:02 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, 4.0 hours before the alert went out and 156 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 882 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 182 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.

293 
WUUS54 KMOB 221600
SVRMOB
ALC023-221645-
/O.NEW.KMOB.SV.W.0033.120322T1600Z-120322T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1100 AM CDT THU MAR 22 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1145 AM CDT

* AT 1057 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES NORTHEAST OF BUTLER...OR
  4 MILES SOUTHWEST OF PENNINGTON...AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PENNINGTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. 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.

&&

LAT...LON 3229 8792 3228 8794 3228 8795 3230 8795
      3230 8798 3228 8801 3218 8800 3215 8801
      3214 8804 3208 8804 3206 8807 3213 8823
      3231 8813 3231 8793
TIME...MOT...LOC 1600Z 207DEG 32KT 3219 8808

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 22, 8:50 AM CDT	Severe Thunderstorm Warning	MOB	Washington	55 min
Mar 22, 10:26 AM CDT	Special Marine Warning	MOB		49 min
Mar 22, 11:13 AM CDT	Special Marine Warning	MOB		2 hr
Mar 22, 11:38 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	67 min
Mar 22, 1:05 PM CDT	Special Marine Warning	MOB		115 min
Mar 22, 1:36 PM CDT	Flash Flood Warning	MOB	Clarke, Mobile, Washington	6 hr
Mar 22, 2:53 PM CDT	Areal Flood Advisory	MOB	Mobile	3 hr
Mar 22, 3:17 PM CDT	Special Marine Warning	MOB		43 min
Mar 22, 3:45 PM CDT	Flash Flood Warning	MOB	Baldwin, Clarke, Escambia, Mobile, Monroe, Washington	6 hr
Mar 22, 4:01 PM CDT	Areal Flood Warning	MOB	Choctaw, Clarke, Washington	12 hr
Mar 22, 4:25 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	50 min
Mar 22, 5:43 PM CDT	Special Marine Warning	MOB		62 min
Mar 22, 6:46 PM CDT	Special Marine Warning	MOB		89 min
Mar 22, 6:51 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Conecuh, Escambia, Monroe	54 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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.