Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 5, NWS Mobile, AL

March 16, 2021Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 16, 2021, 1:38 AM CDT for Choctaw County, Alabama. It was in force for 52 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
Mar 16, 2021, 1:38 AM CDT (06:38 UTC)
Expired
Mar 16, 2021, 2:30 AM CDT
In force
52 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Choctaw County, AL

The radar

The Mobile radar (KMOB), 163 km from the middle of the area, began a volume at 06:39 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, 6.6 hours before the alert went out and 168 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 2021-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1448 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 2021-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
1448 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
2.2
Supercell composite
9.6

Open this sounding in Storm Lab

The text

As transmitted.

664 
WUUS54 KMOB 160638
SVRMOB
ALC023-160730-
/O.NEW.KMOB.SV.W.0005.210316T0638Z-210316T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
138 AM CDT Tue Mar 16 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Choctaw County in southwestern Alabama...

* Until 230 AM CDT.

* At 138 AM CDT, a severe thunderstorm was located 4 miles northwest
  of Toxey, or 13 miles southwest of Butler, moving northeast at 40
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Butler, Pennington, Gilbertown and Toxey. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3231 8793 3228 8793 3230 8794 3230 8798
      3228 8802 3227 8802 3227 8801 3218 8801
      3214 8804 3209 8804 3205 8812 3199 8810
      3201 8809 3199 8807 3199 8808 3183 8838
      3193 8847 3202 8846 3231 8802
TIME...MOT...LOC 0638Z 235DEG 37KT 3195 8838 

HAIL...<.75IN
WIND...60MPH
 
$$
2 follow-up statements
734 
WWUS54 KMOB 160706
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
206 AM CDT Tue Mar 16 2021

ALC023-160730-
/O.CON.KMOB.SV.W.0005.000000T0000Z-210316T0730Z/
Choctaw AL-
206 AM CDT Tue Mar 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR CENTRAL CHOCTAW COUNTY...

At 205 AM CDT, a severe thunderstorm was located 6 miles north of
Toxey, or 7 miles southwest of Butler, moving northeast at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Butler and Pennington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3231 8793 3228 8793 3230 8794 3230 8798
      3228 8802 3227 8802 3227 8801 3218 8801
      3214 8804 3209 8804 3205 8812 3200 8810
      3192 8834 3194 8842 3202 8846 3231 8802
TIME...MOT...LOC 0705Z 247DEG 33KT 3201 8830 

HAIL...<.75IN
WIND...60MPH
 
$$
726 
WWUS54 KMOB 160722
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
222 AM CDT Tue Mar 16 2021

ALC023-160730-
/O.CON.KMOB.SV.W.0005.000000T0000Z-210316T0730Z/
Choctaw AL-
222 AM CDT Tue Mar 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR NORTHEASTERN CHOCTAW COUNTY...

At 221 AM CDT, a severe thunderstorm was located 4 miles east of
Butler, moving northeast at 40 mph.  A new severe thunderstorm 
warning will soon be issued for this storm.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Butler and Pennington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3231 8793 3228 8793 3230 8794 3230 8798
      3228 8802 3227 8802 3227 8801 3218 8801
      3214 8804 3209 8804 3204 8814 3204 8820
      3205 8825 3216 8825 3231 8802
TIME...MOT...LOC 0721Z 237DEG 35KT 3211 8815 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 16, 12:36 AM CDTSpecial Weather StatementMOBChoctaw39 min
Mar 16, 1:17 AM CDTSpecial Weather StatementMOBChoctaw43 min
Mar 16, 2:31 AM CDTSevere Thunderstorm WarningMOBChoctaw28 min
Mar 16, 3:44 AM CDTMarine Dense Fog AdvisoryMOB9 hr
Mar 16, 3:52 AM CDTSpecial Weather StatementMOBChoctaw23 min
Mar 16, 4:24 AM CDTSpecial Weather StatementMOBWilcox66 min
Mar 16, 4:40 AM CDTSevere Thunderstorm WarningMOBWilcox30 min
Mar 16, 5:48 AM CDTSpecial Weather StatementMOBWilcox27 min
Mar 16, 9:24 AM CDTFlash Flood WarningMOBChoctaw, Clarke8 hr
Mar 16, 9:29 AM CDTFlash Flood WarningMOBWilcox8 hr
Mar 16, 10:10 AM CDTSpecial Weather StatementMOBClarke50 min
Mar 16, 10:41 AM CDTSpecial Weather StatementMOBClarke49 min
Mar 16, 11:09 AM CDTSpecial Weather StatementMOBWilcox51 min
Mar 16, 11:28 AM CDTFlash Flood WatchMOBButler, Choctaw, Clarke, Conecuh, Crenshaw, Monroe and 2 more12 hr
Mar 16, 11:42 AM CDTSpecial Weather StatementMOBWilcox48 min
Mar 16, 12:11 PM CDTSpecial Weather StatementMOBButler34 min
Mar 16, 12:47 PM CDTSpecial Weather StatementMOBButler, Crenshaw58 min
Mar 16, 1:11 PM CDTSevere Thunderstorm WarningMOBButler, Crenshaw49 min
Mar 16, 2:00 PM CDTSpecial Weather StatementMOBCrenshaw15 min
Mar 16, 4:47 PM CDTFlash Flood WarningMOBChoctaw, Clarke, Washington, Wilcox6 hr
Mar 16, 4:48 PM CDTMarine Dense Fog AdvisoryMOB17 hr
Mar 16, 4:48 PM CDTSmall Craft AdvisoryMOB5 days
Mar 16, 4:53 PM CDTDense Fog AdvisoryMOBBaldwin, Mobile17 hr
Mar 16, 4:53 PM CDTWind AdvisoryMOBBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more28 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2021Every severe thunderstorm warning 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.