Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

June 20, 2021Covington County, Alabama

NWS Mobile, AL issued this special weather statement at Jun 20, 2021, 2:40 AM CDT for Covington County, Alabama. It was in force for 50 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
Jun 20, 2021, 2:40 AM CDT (07:40 UTC)
Expired
Jun 20, 2021, 3:30 AM CDT
In force
50 min
Issued by
NWS Mobile, AL

County Covington County, AL

The radar

The Eglin Afb radar (KEVX), 93 km from the middle of the area, began a volume at 07:40 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, 7.7 hours before the alert went out and 223 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 00:00Z on 2021-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 380 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 00:00Z on 2021-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 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
380 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
475 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

130 
WWUS84 KMOB 200740
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
240 AM CDT Sun Jun 20 2021
 
ALZ059-060-200830-
Covington AL-Escambia AL-
240 AM CDT Sun Jun 20 2021

...STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING COUNTIES... 
SOUTHEASTERN ESCAMBIA AND COVINGTON COUNTIES UNTIL 330 AM CDT...

At 236 AM CDT, the strong thunderstorms were located 13 miles northwest
of Laurel Hill, or 13 miles southwest of Andalusia, moving east at 40
mph.

Wind in excess of 40 mph will be possible with these storms.

Locations impacted include...
Andalusia, Opp, Florala and Lockhart. 

LAT...LON 3100 8675 3119 8674 3119 8673 3118 8672
      3119 8672 3119 8670 3122 8670 3144 8622
      3144 8619 3100 8619
TIME...MOT...LOC 0736Z 256DEG 62KT 3113 8658 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 10:56 PM CDTSpecial Weather StatementMOBCrenshaw49 min
Jun 19, 11:46 PM CDTSpecial Weather StatementMOBConecuh, Crenshaw, Escambia44 min
Jun 20, 12:31 AM CDTSpecial Weather StatementMOBConecuh, Covington, Escambia59 min
Jun 20, 1:35 AM CDTSpecial Weather StatementMOBCovington40 min
Jun 20, 4:51 AM CDTHigh Surf AdvisoryMOBBaldwin, Mobile14 hr
Jun 20, 5:02 AM CDTSpecial Marine WarningMOB88 min
Jun 20, 6:30 AM CDTSpecial Marine WarningMOB90 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.