Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Mobile, AL

March 16, 2021Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 16, 2021, 2:31 AM CDT for Choctaw County, Alabama. It was in force for 28 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 16, 2021, 2:31 AM CDT (07:31 UTC)
Expired: Mar 16, 2021, 2:59 AM CDT
In force: 28 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Choctaw County, AL

The radar

The Birmingham radar (KBMX), 163 km from the middle of the area, began a volume at 07:34 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 00:00Z, 7.5 hours before the alert went out and 163 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: 1448 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

321 
WUUS54 KMOB 160731
SVRMOB
ALC023-160815-
/O.NEW.KMOB.SV.W.0006.210316T0731Z-210316T0815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
231 AM CDT Tue Mar 16 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northeastern Choctaw County in southwestern Alabama...

* Until 315 AM CDT.

* At 230 AM CDT, a severe thunderstorm was located over Butler, 
  moving east at 40 mph.  Another severe thunderstorms was located 
  miles southwest of Pennington, or 8 miles northeast of Butler, 
  moving northeast at 40 mph.


  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Butler and Pennington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3231 8793 3228 8793 3230 8794 3230 8798
      3228 8802 3227 8802 3218 8801 3215 8802
      3214 8804 3209 8804 3206 8807 3207 8810
      3206 8811 3201 8812 3197 8821 3212 8832
      3231 8803
TIME...MOT...LOC 0730Z 247DEG 36KT 3210 8819 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

1 follow-up statement

246 
WWUS54 KMOB 160759
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
259 AM CDT Tue Mar 16 2021

ALC023-160809-
/O.CAN.KMOB.SV.W.0006.000000T0000Z-210316T0815Z/
Choctaw AL-
259 AM CDT Tue Mar 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHOCTAW COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 3231 8793 3228 8793 3230 8794 3230 8798
      3228 8802 3227 8802 3218 8801 3215 8802
      3214 8804 3209 8804 3206 8807 3207 8810
      3206 8811 3201 8812 3197 8821 3212 8832
      3231 8803
TIME...MOT...LOC 0757Z 247DEG 36KT 3222 8787 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 16, 12:36 AM CDT	Special Weather Statement	MOB	Choctaw	39 min
Mar 16, 1:17 AM CDT	Special Weather Statement	MOB	Choctaw	43 min
Mar 16, 1:38 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	52 min
Mar 16, 3:44 AM CDT	Marine Dense Fog Advisory	MOB		9 hr
Mar 16, 3:52 AM CDT	Special Weather Statement	MOB	Choctaw	23 min
Mar 16, 4:24 AM CDT	Special Weather Statement	MOB	Wilcox	66 min
Mar 16, 4:40 AM CDT	Severe Thunderstorm Warning	MOB	Wilcox	30 min
Mar 16, 5:48 AM CDT	Special Weather Statement	MOB	Wilcox	27 min
Mar 16, 9:24 AM CDT	Flash Flood Warning	MOB	Choctaw, Clarke	8 hr
Mar 16, 9:29 AM CDT	Flash Flood Warning	MOB	Wilcox	8 hr
Mar 16, 10:10 AM CDT	Special Weather Statement	MOB	Clarke	50 min
Mar 16, 10:41 AM CDT	Special Weather Statement	MOB	Clarke	49 min
Mar 16, 11:09 AM CDT	Special Weather Statement	MOB	Wilcox	51 min
Mar 16, 11:28 AM CDT	Flash Flood Watch	MOB	Butler, Choctaw, Clarke, Conecuh, Crenshaw, Monroe and 2 more	12 hr
Mar 16, 11:42 AM CDT	Special Weather Statement	MOB	Wilcox	48 min
Mar 16, 12:11 PM CDT	Special Weather Statement	MOB	Butler	34 min
Mar 16, 12:47 PM CDT	Special Weather Statement	MOB	Butler, Crenshaw	58 min
Mar 16, 1:11 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	49 min
Mar 16, 2:00 PM CDT	Special Weather Statement	MOB	Crenshaw	15 min
Mar 16, 4:47 PM CDT	Flash Flood Warning	MOB	Choctaw, Clarke, Washington, Wilcox	6 hr
Mar 16, 4:48 PM CDT	Marine Dense Fog Advisory	MOB		17 hr
Mar 16, 4:48 PM CDT	Small Craft Advisory	MOB		5 days
Mar 16, 4:53 PM CDT	Dense Fog Advisory	MOB	Baldwin, Mobile	17 hr
Mar 16, 4:53 PM CDT	Wind Advisory	MOB	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more	28 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2021 Every severe thunderstorm warning 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.