Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 189, NWS Mobile, AL

August 11, 2021Butler County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 11, 2021, 7:30 PM CDT for Butler County, Crenshaw County, Alabama. It was in force for 45 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: Aug 11, 2021, 7:30 PM CDT (00:30 UTC)
Expired: Aug 11, 2021, 8:15 PM CDT
In force: 45 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Butler County, AL, Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 89 km from the middle of the area, began a volume at 00:31 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, 0.5 hours before the alert went out and 157 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: 71 J/kg
Mixed-layer CIN: -232 J/kg
Mixed-layer LCL: 1550 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

061 
WUUS54 KMOB 120030
SVRMOB
ALC013-041-120115-
/O.NEW.KMOB.SV.W.0189.210812T0030Z-210812T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
730 PM CDT Wed Aug 11 2021

The National Weather Service in Mobile has issued a

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

* Until 815 PM CDT.

* At 730 PM CDT, severe thunderstorms were located along a line
  extending from 10 miles east of Georgiana to 5 miles southeast of
  Glenwood, moving north at 15 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Luverne, Rutledge, Glenwood, Petrey and Highland Home. 

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3170 8660 3196 8661 3196 8641 3203 8641
      3204 8640 3205 8640 3205 8630 3197 8630
      3196 8619 3189 8617 3179 8620 3179 8615
      3166 8615 3166 8616 3165 8616 3162 8618
      3162 8615 3160 8615
TIME...MOT...LOC 0030Z 173DEG 13KT 3168 8657 3159 8614 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CGAL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 7:01 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Covington, Crenshaw	44 min
Aug 11, 7:46 PM CDT	Special Weather Statement	MOB	Crenshaw	44 min
Aug 11, 7:47 PM CDT	Special Weather Statement	MOB	Conecuh	43 min
Aug 11, 7:56 PM CDT	Areal Flood Advisory	MOB	Butler, Crenshaw	3 hr
Aug 11, 8:01 PM CDT	Special Weather Statement	MOB	Butler	44 min
Aug 11, 8:09 PM CDT	Flash Flood Warning	MOB	Butler	3 hr
Aug 12, 9:42 AM CDT	Special Marine Warning	MOB		63 min
Aug 12, 12:31 PM CDT	Special Weather Statement	MOB	Escambia	59 min
Aug 12, 6:03 PM CDT	Special Weather Statement	MOB	Crenshaw	57 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.