Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

August 9, 2021Clarke County, Alabama

NWS Mobile, AL issued this special weather statement at Aug 9, 2021, 3:23 PM CDT for Clarke County, Alabama. It was in force for 37 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 9, 2021, 3:23 PM CDT (20:23 UTC)
Expired
Aug 9, 2021, 4:00 PM CDT
In force
37 min
Issued by
NWS Mobile, AL
Hail
0.25 in
Wind
40

County Clarke County, AL

The radar

The Mobile radar (KMOB), 139 km from the middle of the area, began a volume at 20:26 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, 8.4 hours before the alert went out and 172 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 2021-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1644 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 2021-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 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
1644 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
893 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

363 
WWUS84 KMOB 092023
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
323 PM CDT Mon Aug 9 2021
 
ALZ053-092100-
Clarke AL-
323 PM CDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of northeastern Clarke
County through 400 PM CDT...

At 322 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles southeast of Fulton, or 4 miles east of Grove Hill, moving
northeast at 5 mph.

HAZARD...Winds in excess of 40 mph and pea size 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...
Thomasville, Grove Hill, Whatley and Fulton. 

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.

&&

LAT...LON 3189 8768 3188 8767 3188 8766 3186 8762
      3183 8762 3183 8756 3180 8752 3174 8752
      3162 8765 3171 8783 3192 8774
TIME...MOT...LOC 2022Z 211DEG 5KT 3173 8770 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 5:19 PM CDTSpecial Weather StatementMOBMonroe41 min
Aug 9, 5:59 PM CDTSpecial Weather StatementMOBConecuh31 min
Aug 9, 11:43 AM CDTSpecial Weather StatementMOBEscambia47 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.