Alert archive / Alabama / Tornado Warnings in 2021

Tornado Warning 20, NWS Mobile, AL

March 31, 2021Choctaw County, Alabama

NWS Mobile, AL issued this tornado warning at Mar 31, 2021, 1:01 PM CDT for Choctaw County, Alabama. It was in force for 9 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 31, 2021, 1:01 PM CDT (18:01 UTC)
Expired: Mar 31, 2021, 1:10 PM CDT
In force: 9 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Choctaw County, AL

The radar

The Birmingham radar (KBMX), 161 km from the middle of the area, began a volume at 18:01 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 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, 6.0 hours before the alert went out and 161 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.

573 
WFUS54 KMOB 311801
TORMOB
ALC023-311845-
/O.NEW.KMOB.TO.W.0020.210331T1801Z-210331T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
101 PM CDT Wed Mar 31 2021

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Northeastern Choctaw County in southwestern Alabama...

* Until 145 PM CDT.
    
* At 101 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Pennington, or 13 miles southwest of Linden,
  moving east at 75 mph.

  HAZARD...Tornado and half dollar size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Choctaw County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3225 8801 3219 8801 3215 8802 3215 8803
      3214 8804 3214 8808 3224 8809
TIME...MOT...LOC 1801Z 267DEG 64KT 3219 8800 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

JLH

1 follow-up statement

538 
WWUS54 KMOB 311810
SVSMOB

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

ALC023-311819-
/O.CAN.KMOB.TO.W.0020.000000T0000Z-210331T1845Z/
Choctaw AL-
110 PM CDT Wed Mar 31 2021

...THE TORNADO WARNING FOR NORTHEASTERN CHOCTAW COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 500 PM CDT for
southwestern Alabama.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mobile.

Remember, a Severe Thunderstorm Warning still remains in effect for 
all of Choctaw county until 145 PM CDT. A line of severe 
thunderstorms will move across central and southern Choctaw county 
and likely produce damaging winds. 

LAT...LON 3225 8801 3219 8801 3215 8802 3215 8803
      3214 8804 3214 8808 3224 8809
TIME...MOT...LOC 1809Z 267DEG 64KT 3220 8782 

$$

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, 12:51 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	54 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

Tornado Warnings in Alabama, 2021 Every tornado warning in 2021 Tornadoes 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.