Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

April 9, 2021Clarke County, Alabama

NWS Mobile, AL issued this special weather statement at Apr 9, 2021, 8:06 AM CDT for Clarke County, Alabama. It was in force for 39 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
Apr 9, 2021, 8:06 AM CDT (13:06 UTC)
Expired
Apr 9, 2021, 8:45 AM CDT
In force
39 min
Issued by
NWS Mobile, AL

County Clarke County, AL

The radar

The Mobile radar (KMOB), 125 km from the middle of the area, began a volume at 13:07 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, 1.1 hours before the alert went out and 186 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 2021-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 89 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 2021-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.19395878Sfc1 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
89 J/kg
Mixed-layer CIN
-208 J/kg
Mixed-layer LCL
1321 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

223 
WWUS84 KMOB 091306
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
806 AM CDT Fri Apr 9 2021
 
ALZ053-055-091345-
Clarke AL-Monroe AL-
806 AM CDT Fri Apr 9 2021

...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...NORTH
CENTRAL MONROE AND EAST CENTRAL CLARKE COUNTIES UNTIL 845 AM CDT...

At 805 AM CDT, the strong thunderstorm was located over Whatley, or
near Grove Hill, moving east at 20 mph.

Nickel size hail and wind gusts of 40 to 50 mph will be possible with
this storm.

Locations impacted include...
Grove Hill and Whatley. 

LAT...LON 3160 8781 3173 8781 3176 8746 3172 8740
      3161 8738 3155 8745
TIME...MOT...LOC 1305Z 271DEG 17KT 3167 8774 

$$

Black

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 10:33 PM CDTSmall Craft AdvisoryMOB41 hr
Apr 9, 2:57 AM CDTSevere Thunderstorm WarningMOBMobile34 min
Apr 9, 3:30 AM CDTSpecial Weather StatementMOBMobile45 min
Apr 9, 3:57 AM CDTSpecial Marine WarningMOB93 min
Apr 9, 4:17 AM CDTSpecial Weather StatementMOBMobile58 min
Apr 9, 4:25 AM CDTSpecial Marine WarningMOB2 hr
Apr 9, 6:28 AM CDTSpecial Marine WarningMOB2 hr
Apr 9, 6:42 AM CDTSpecial Marine WarningMOB2 hr
Apr 9, 6:47 AM CDTSpecial Weather StatementMOBClarke43 min
Apr 9, 6:54 AM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke38 min
Apr 9, 7:02 AM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke, Washington43 min
Apr 9, 7:45 AM CDTSevere Thunderstorm WarningMOBClarke, Monroe21 min
Apr 9, 8:09 AM CDTSpecial Marine WarningMOB96 min
Apr 9, 8:28 AM CDTSpecial Marine WarningMOB105 min
Apr 9, 9:49 AM CDTSpecial Marine WarningMOB54 min
Apr 9, 12:18 PM CDTHigh Surf AdvisoryMOBBaldwin, Mobile43 hr
Apr 9, 12:23 PM CDTSpecial Weather StatementMOBWilcox52 min
Apr 9, 2:16 PM CDTSpecial Weather StatementMOBWilcox44 min
Apr 9, 2:18 PM CDTSpecial Weather StatementMOBChoctaw42 min
Apr 9, 2:35 PM CDTSpecial Weather StatementMOBChoctaw40 min
Apr 9, 2:56 PM CDTSpecial Weather StatementMOBCrenshaw49 min
Apr 9, 8:11 AM CDTSpecial Weather StatementMOBOkaloosa49 min
Apr 9, 8:16 AM CDTAreal Flood AdvisoryMOBOkaloosa, Santa Rosa119 min
Apr 9, 10:15 AM CDTRiver Flood WarningMOBGeorge, Greene, Wayne21 days
Apr 9, 10:16 AM CDTRiver Flood WarningMOBGeorge, Greene, Jackson21 days
Apr 9, 10:18 AM CDTRiver Flood WarningMOBGeorge, Greene, Perry21 days

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.