Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

July 23, 2021Elmore County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 23, 2021, 2:21 PM CDT for Elmore County, Alabama. It was in force for 24 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: Jul 23, 2021, 2:21 PM CDT (19:21 UTC)
Expired: Jul 23, 2021, 2:45 PM CDT
In force: 24 min
Issued by: NWS Birmingham, AL

County Elmore County, AL

The radar

The Maxwell AFB radar (KMXX), 46 km from the middle of the area, began a volume at 19:26 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 12:00Z, 7.4 hours before the alert went out and 73 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: 1133 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

346 
WWUS84 KBMX 231921
SPSBMX

Special Weather Statement
National Weather Service Birmingham AL
221 PM CDT Fri Jul 23 2021
 
ALZ036-043-231945-
Coosa AL-Elmore AL-
221 PM CDT Fri Jul 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ELMORE AND SOUTH
CENTRAL COOSA COUNTIES UNTIL 245 PM CDT...

At 221 PM CDT, Doppler radar was tracking a strong thunderstorm near
Speed, or 8 miles west of Equality, moving south at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Jordan Lake, Speed, Ten Cedar Estates, Dexter, Titus, Weoka Mills,
Santuck, Holtville and Jordan Dam.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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

&&

LAT...LON 3281 8626 3279 8613 3261 8613 3259 8627
      3266 8636
TIME...MOT...LOC 1921Z 006DEG 11KT 3273 8624 

$$

40/Sizemore

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:13 PM CDT	Special Weather Statement	BMX	Macon	47 min
Jul 22, 8:48 PM CDT	Areal Flood Advisory	BMX	Elmore, Tallapoosa	3 hr
Jul 23, 2:55 PM CDT	Special Weather Statement	BMX	Macon	35 min
Jul 23, 4:52 PM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	3 hr
Jul 23, 5:09 PM CDT	Special Weather Statement	BMX	Fayette	36 min
Jul 23, 5:46 PM CDT	Areal Flood Advisory	BMX	Fayette	119 min
Jul 23, 6:32 PM CDT	Areal Flood Advisory	BMX	Tuscaloosa	118 min
Jul 23, 6:39 PM CDT	Flash Flood Warning	BMX	Tuscaloosa	2 hr

Nearby

Special Weather Statements in Alabama, 2021 Every special weather statement 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.