Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 123, NWS Mobile, AL

May 12, 2021Conecuh County, Covington County, Escambia County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 12, 2021, 6:01 AM CDT for Conecuh County, Covington County, Escambia County, Alabama. It was in force for 44 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: May 12, 2021, 6:01 AM CDT (11:01 UTC)
Expired: May 12, 2021, 6:45 AM CDT
In force: 44 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Conecuh County, AL, Covington County, AL, Escambia County, AL

The radar

The Eglin Afb radar (KEVX), 105 km from the middle of the area, began a volume at 11:04 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, 11.0 hours before the alert went out and 219 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: 100 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

644 
WUUS54 KMOB 121101
SVRMOB
ALC035-039-053-121145-
/O.NEW.KMOB.SV.W.0123.210512T1101Z-210512T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
601 AM CDT Wed May 12 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Eastern Escambia County in south central Alabama...
  Southeastern Conecuh County in south central Alabama...
  West central Covington County in south central Alabama...

* Until 645 AM CDT.

* At 601 AM CDT, a severe thunderstorm was located 11 miles east of
  East Brewton, or 11 miles east of Brewton, moving northeast at 40
  mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly rural areas of
  eastern Escambia, southeastern Conecuh and west central Covington
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3125 8649 3101 8685 3113 8701 3143 8678
TIME...MOT...LOC 1101Z 218DEG 34KT 3113 8688 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 2:55 AM CDT	Special Weather Statement	MOB	Washington	65 min
May 12, 3:31 AM CDT	Special Weather Statement	MOB	Baldwin, Mobile	44 min
May 12, 3:46 AM CDT	Flash Flood Warning	MOB	Clarke, Washington	4 hr
May 12, 4:06 AM CDT	Special Weather Statement	MOB	Baldwin, Mobile	54 min
May 12, 4:12 AM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	3 hr
May 12, 4:20 AM CDT	Special Marine Warning	MOB		85 min
May 12, 4:41 AM CDT	Special Marine Warning	MOB		94 min
May 12, 4:56 AM CDT	Severe Thunderstorm Warning	MOB	Mobile	24 min
May 12, 5:01 AM CDT	Areal Flood Advisory	MOB	Baldwin, Escambia	3 hr
May 12, 5:04 AM CDT	Special Weather Statement	MOB	Baldwin, Escambia	86 min
May 12, 6:24 AM CDT	Special Marine Warning	MOB		96 min
May 12, 6:29 AM CDT	Severe Thunderstorm Warning	MOB	Covington	64 min
May 12, 6:35 AM CDT	Special Marine Warning	MOB		55 min
May 12, 6:52 AM CDT	Areal Flood Advisory	MOB	Conecuh, Covington, Escambia	3 hr
May 12, 6:56 AM CDT	Severe Thunderstorm Warning	MOB	Covington, Crenshaw	35 min
May 12, 7:18 AM CDT	Special Marine Warning	MOB		87 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.