Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

October 3, 2021Winston County, Alabama

NWS Birmingham, AL issued this special weather statement at Oct 3, 2021, 4:42 PM CDT for Winston County, Alabama. It was in force for 48 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
Oct 3, 2021, 4:42 PM CDT (21:42 UTC)
Expired
Oct 3, 2021, 5:30 PM CDT
In force
48 min
Issued by
NWS Birmingham, AL
Hail
0.50 in
Wind
40

County Winston County, AL

The radar

The Columbus AFB radar (KGWX), 93 km from the middle of the area, began a volume at 21:44 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, 9.7 hours before the alert went out and 130 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2021-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 352 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2021-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
352 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

599 
WWUS84 KBMX 032142
SPSBMX

Special Weather Statement
National Weather Service Birmingham AL
442 PM CDT Sun Oct 3 2021
 
ALZ014-032230-
Winston AL-
442 PM CDT Sun Oct 3 2021

...A strong thunderstorm will impact portions of northern Winston
County through 530 PM CDT...

At 441 PM CDT, Doppler radar was tracking a strong thunderstorm near
Needmore, or near Haleyville, moving east at 20 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Haleyville, Arley, Double Springs, Addison, Houston Recreational
Area, Brushy Lake, Ashridge, Corinth Rec Area, Needmore, Moreland,
Winston Free State Barn, Smith Lake, Houston, Posey Field Airport,
Hullett Branch, Winston County Airport, Cane Creek, Pebble, Bull
Branch and Yellow Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3430 8719 3408 8720 3410 8764 3429 8763
      3431 8756
TIME...MOT...LOC 2141Z 264DEG 12KT 3420 8758 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 3, 2:48 PM CDTSpecial Weather StatementBMXMarengo42 min
Oct 3, 4:31 PM CDTSpecial Weather StatementBMXWalker44 min

Nearby

Special Weather Statements in Alabama, 2021Every 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.