Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

August 30, 2021Macon County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 30, 2021, 3:11 PM CDT for Macon County, Alabama. It was in force for 49 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 30, 2021, 3:11 PM CDT (20:11 UTC)
Expired: Aug 30, 2021, 4:00 PM CDT
In force: 49 min
Issued by: NWS Birmingham, AL
Hail: 0.00 in
Wind: 50

County Macon County, AL

The radar

The Maxwell AFB radar (KMXX), 25 km from the middle of the area, began a volume at 20:10 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, 8.2 hours before the alert went out and 124 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: 6 J/kg
Mixed-layer CIN: -242 J/kg
Mixed-layer LCL: 1267 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

273 
WWUS84 KBMX 302011
SPSBMX

Special Weather Statement
National Weather Service Birmingham AL
311 PM CDT Mon Aug 30 2021
 
ALZ045-046-302100-
Macon AL-Bullock AL-
311 PM CDT Mon Aug 30 2021

...Strong thunderstorms will impact portions of northwestern Bullock
and southern Macon Counties through 400 PM CDT...

At 311 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Franklin Field to near Aberfoil. Movement
was north at 20 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Union Springs, Shorter, Hardaway, Liverpool, Tysonville, Victoryland,
Davisville, Franklin Field, Cross Keys, Sedgefield, Mitchell and Fort
Davis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

&&

LAT...LON 3218 8591 3227 8595 3228 8592 3230 8595
      3232 8596 3233 8598 3242 8602 3243 8599
      3244 8599 3244 8598 3245 8598 3244 8596
      3245 8594 3233 8556 3207 8558
TIME...MOT...LOC 2011Z 173DEG 19KT 3221 8585 3211 8565 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

$$

05

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 8:36 PM CDT	River Flood Warning	BMX	Greene, Marengo, Sumter	4 days
Aug 30, 10:18 AM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Sumter	4 days
Aug 30, 11:23 AM CDT	Areal Flood Advisory	BMX	Greene, Hale, Marengo, Perry, Sumter	4 hr
Aug 30, 1:45 PM CDT	Special Weather Statement	BMX	Pike	45 min
Aug 30, 2:06 PM CDT	Tornado Warning	BMX	Pike	39 min
Aug 30, 2:53 PM CDT	Areal Flood Advisory	BMX	Cherokee	3 hr
Aug 30, 3:31 PM CDT	Special Weather Statement	BMX	Macon	44 min
Aug 30, 3:44 PM CDT	Tornado Warning	BMX	Lee, Macon	14 min
Aug 30, 4:07 PM CDT	Special Weather Statement	BMX	Lee, Tallapoosa	38 min
Aug 30, 4:41 PM CDT	Special Weather Statement	BMX	Chambers, Clay, Randolph	49 min
Aug 30, 5:23 PM CDT	Special Weather Statement	BMX	Cleburne, Randolph	52 min

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.