Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 7, NWS Mobile, AL

March 16, 2021Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 16, 2021, 4:40 AM CDT for Wilcox County, Alabama. It was in force for 30 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, 4:40 AM CDT (09:40 UTC)
Expired: Mar 16, 2021, 5:10 AM CDT
In force: 30 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 127 km from the middle of the area, began a volume at 09:45 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, 9.7 hours before the alert went out and 128 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.

696 
WUUS54 KMOB 160940
SVRMOB
ALC131-161030-
/O.NEW.KMOB.SV.W.0007.210316T0940Z-210316T1030Z/

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

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wilcox County in south central Alabama...

* Until 530 AM CDT.

* At 440 AM CDT, a severe thunderstorm was located over Magnolia, or
  13 miles north of Thomasville, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Wilcox County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3227 8744 3225 8742 3224 8739 3220 8736
      3220 8733 3214 8728 3214 8725 3212 8726
      3208 8719 3205 8718 3205 8712 3201 8712
      3200 8767 3201 8762 3213 8762 3213 8752
      3226 8752 3227 8751
TIME...MOT...LOC 0940Z 267DEG 26KT 3210 8765 

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

1 follow-up statement

974 
WWUS54 KMOB 161010
SVSMOB

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

ALC131-161020-
/O.CAN.KMOB.SV.W.0007.000000T0000Z-210316T1030Z/
Wilcox AL-
510 AM CDT Tue Mar 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WILCOX COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, therefore the warning has been cancelled.

LAT...LON 3227 8744 3225 8742 3224 8739 3220 8736
      3220 8733 3214 8728 3214 8725 3212 8726
      3208 8719 3205 8718 3205 8712 3201 8712
      3200 8767 3201 8762 3213 8762 3213 8752
      3226 8752 3227 8751
TIME...MOT...LOC 1009Z 267DEG 26KT 3211 8739 

$$

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, 2:31 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	28 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, 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.