Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 43, NWS Mobile, AL

March 31, 2021Covington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 31, 2021, 4:13 PM CDT for Covington County, Alabama. It was in force for 47 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, 4:13 PM CDT (21:13 UTC)
Expired: Mar 31, 2021, 5:00 PM CDT
In force: 47 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Covington County, AL

The radar

The Ft Rucker radar (KEOX), 85 km from the middle of the area, began a volume at 21:13 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, 3:12 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.2 hours before the alert went out and 198 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.

657 
WUUS54 KMOB 312113
SVRMOB
ALC039-312200-
/O.NEW.KMOB.SV.W.0043.210331T2113Z-210331T2200Z/

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

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northeastern Covington County in south central Alabama...

* Until 500 PM CDT.

* At 412 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles northwest of Dozier to Gantt to 4 miles
  south of Red Level, moving east at 55 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Andalusia, Opp, Heath and Gantt. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3129 8656 3141 8649 3153 8644 3153 8640
      3145 8640 3149 8636 3149 8634 3153 8630
      3153 8628 3146 8628 3145 8626 3144 8626
      3144 8619 3123 8619
TIME...MOT...LOC 2112Z 283DEG 49KT 3156 8644 3141 8646 3134 8663 

HAIL...0.75IN
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, 12:51 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	54 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, 4:30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.