Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 211, NWS Tallahassee, FL

August 11, 2021Coffee County, Alabama

NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 11, 2021, 7:06 PM CDT for Coffee County, Alabama. It was in force for 38 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, 7:06 PM CDT (00:06 UTC)
Expired: Aug 11, 2021, 7:44 PM CDT
In force: 38 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Coffee County, AL

The radar

The Ft Rucker radar (KEOX), 64 km from the middle of the area, began a volume at 00:09 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, 0.1 hours before the alert went out and 194 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.

093 
WUUS52 KTAE 120006
SVRTAE
ALC031-120100-
/O.NEW.KTAE.SV.W.0211.210812T0006Z-210812T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
706 PM CDT Wed Aug 11 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Northwestern Coffee County in southeastern Alabama...

* Until 800 PM CDT.

* At 706 PM CDT, a severe thunderstorm was located 7 miles southeast
  of Glenwood, or 10 miles north of Elba, moving north at 20 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Elba, Lee, Pine Level, Curtis, Carl Folsom A/p, Danleys Crossroads,
  Wilkinstown, Zoar, Camp Humming Hills, Newby, Wise Mill, Bluff
  Spring and Jack.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3153 8619 3153 8616 3154 8616 3154 8614
      3162 8615 3162 8599 3140 8598 3139 8620
TIME...MOT...LOC 0006Z 163DEG 16KT 3157 8612 

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

72-BUNKER

1 follow-up statement

330 
WWUS52 KTAE 120044
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
744 PM CDT Wed Aug 11 2021

ALC031-120054-
/O.CAN.KTAE.SV.W.0211.000000T0000Z-210812T0100Z/
Coffee AL-
744 PM CDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN COFFEE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 3153 8619 3153 8616 3154 8616 3154 8614
      3162 8615 3162 8599 3140 8598 3139 8620
TIME...MOT...LOC 0041Z 163DEG 16KT 3173 8618 

$$

72-BUNKER

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 3:20 PM CDT	Special Weather Statement	TAE	Houston	55 min
Aug 12, 3:46 PM CDT	Special Weather Statement	TAE	Geneva	29 min
Aug 12, 3:59 PM CDT	Severe Thunderstorm Warning	TAE	Houston	46 min
Aug 12, 4:12 PM CDT	Severe Thunderstorm Warning	TAE	Dale, Henry	39 min
Aug 12, 4:55 PM CDT	Special Weather Statement	TAE	Dale, Henry	35 min
Aug 12, 5:26 PM CDT	Special Weather Statement	TAE	Dale	19 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.