Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 37, NWS Mobile, AL

March 31, 2021Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 31, 2021, 12:51 PM CDT for Choctaw County, Alabama. It was in force for 54 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 31, 2021, 12:51 PM CDT (17:51 UTC)
Expired: Mar 31, 2021, 1:45 PM CDT
In force: 54 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Choctaw County, AL

The radar

The Mobile radar (KMOB), 152 km from the middle of the area, began a volume at 17:53 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.

What was reported inside it

Time	Report	Where	Remark
Mar 31, 1:40 PM CDT	HAIL 1	Needham, AL	QUARTER SIZE HAIL REPORT FROM EMERGENCY MANAGER. TIME ESTIMATED BASED ON RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 31, 11:19 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.9 hours before the alert went out and 178 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: 455 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

As transmitted.

147 
WUUS54 KMOB 311751
SVRMOB
ALC023-311845-
/O.NEW.KMOB.SV.W.0037.210331T1751Z-210331T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1251 PM CDT Wed Mar 31 2021

The National Weather Service in Mobile has issued a

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

* Until 145 PM CDT.

* At 1250 PM CDT, a line of severe thunderstorms was located near De 
  Soto, or 4 miles southwest of Quitman, moving east at 55 mph. 
  Another line of severe thunderstorms is currently moving east 
  across northern Choctaw county to the north of Butler. 

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Butler, Lisman, Silas, Pennington, Gilbertown and Toxey. 

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 3218 8801 3209 8805 3205 8812
      3201 8811 3198 8807 3195 8812 3193 8806
      3190 8813 3181 8818 3175 8814 3176 8810
      3170 8810 3170 8846 3190 8847 3231 8842
TIME...MOT...LOC 1750Z 259DEG 49KT 3199 8878 

HAIL...0.75IN
WIND...60MPH
 
$$

JLH

2 follow-up statements

458 
WWUS54 KMOB 311817
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
117 PM CDT Wed Mar 31 2021

ALC023-311845-
/O.CON.KMOB.SV.W.0037.000000T0000Z-210331T1845Z/
Choctaw AL-
117 PM CDT Wed Mar 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR CHOCTAW COUNTY...

At 117 PM CDT, severe thunderstorms were located along a line
extending from 6 miles east of Sykes to 5 miles southeast of Crandall
to 11 miles north of Waynesboro, moving east at 50 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Butler, Silas, Gilbertown and Toxey. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3209 8805 3205 8812 3201 8811 3198 8807
      3195 8812 3193 8806 3190 8813 3181 8818
      3175 8814 3176 8810 3170 8810 3170 8846
      3190 8847 3213 8844 3213 8803
TIME...MOT...LOC 1817Z 268DEG 43KT 3208 8848 3193 8846 3183 8859 

HAIL...0.75IN
WIND...60MPH
 
$$

JLH

592 
WWUS54 KMOB 311835
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
135 PM CDT Wed Mar 31 2021

ALC023-311845-
/O.CON.KMOB.SV.W.0037.000000T0000Z-210331T1845Z/
Choctaw AL-
135 PM CDT Wed Mar 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR CHOCTAW COUNTY...

At 135 PM CDT, severe thunderstorms were located along a line
extending from 4 miles southwest of Butler to 4 miles east of Toxey
to near Silas, moving east at 60 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Butler, Silas, Gilbertown and Toxey. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3209 8805 3205 8812 3201 8811 3198 8807
      3195 8812 3193 8806 3190 8813 3181 8818
      3175 8814 3176 8810 3170 8810 3170 8846
      3190 8847 3213 8844 3213 8803
TIME...MOT...LOC 1835Z 274DEG 53KT 3204 8826 3189 8824 3179 8837 

HAIL...1.50IN
WIND...60MPH
 
$$

JLH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 7:45 PM CDT	Areal Flood Advisory	MOB	Washington	108 min
Mar 30, 8:55 PM CDT	River Flood Warning	MOB	Baldwin, Mobile	21 days
Mar 31, 3:35 AM CDT	Gale Watch	MOB		6 hr
Mar 31, 3:35 AM CDT	Gale Warning	MOB		33 hr
Mar 31, 3:35 AM CDT	Marine Dense Fog Advisory	MOB		8 hr
Mar 31, 3:35 AM CDT	Small Craft Advisory	MOB		57 hr
Mar 31, 12:25 PM CDT	Special Weather Statement	MOB	Choctaw	50 min
Mar 31, 1:01 PM CDT	Tornado Warning	MOB	Choctaw	9 min
Mar 31, 1:29 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	61 min
Mar 31, 1:43 PM CDT	Freeze Watch	MOB	Butler, Choctaw, Clarke, Conecuh, Crenshaw, Monroe and 2 more	13 hr
Mar 31, 1:43 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	47 min
Mar 31, 1:45 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	15 min
Mar 31, 2:04 PM CDT	Special Weather Statement	MOB	Washington	56 min
Mar 31, 2:14 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Monroe, Wilcox	61 min
Mar 31, 3:15 PM CDT	Special Weather Statement	MOB	Butler, Crenshaw	60 min
Mar 31, 3:58 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	33 min
Mar 31, 4:13 PM CDT	Severe Thunderstorm Warning	MOB	Covington	47 min
Mar 31, 4:30 PM CDT	Special Weather Statement	MOB	Baldwin, Covington, Escambia, Mobile	45 min
Mar 31, 4:40 PM CDT	Severe Thunderstorm Warning	MOB	Covington	44 min
Mar 31, 5:03 PM CDT	Special Marine Warning	MOB		42 min
Mar 31, 6:20 PM CDT	Special Marine Warning	MOB		26 min
Mar 31, 6:23 PM CDT	Special Marine Warning	MOB		65 min
Mar 31, 6:49 PM CDT	Special Marine Warning	MOB		62 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.