Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 47, NWS Mobile, AL

April 9, 2021Choctaw County, Clarke County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 9, 2021, 6:54 AM CDT for Choctaw County, Clarke County, Alabama. It was in force for 38 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 9, 2021, 6:54 AM CDT (11:54 UTC)
Expired: Apr 9, 2021, 7:32 AM CDT
In force: 38 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Choctaw County, AL, Clarke County, AL

The radar

The Mobile radar (KMOB), 140 km from the middle of the area, began a volume at 11:56 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.

What was reported inside it

Time	Report	Where	Remark
Apr 9, 7:20 AM CDT	HAIL 1.75	4 W Bashi, AL	GOLF BALL SIZE HAIL REPORTED NEAR BASHI RD ABOUT 3 TO 4 MILES EAST OF HIGHWAY 69.
Apr 9, 7:22 AM CDT	HAIL 2.5	Bashi, AL	HEN EGG TO TENNIS BALL SIZE HAIL REPORTED IN BASHI. PICTURES RELAYED VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 11.9 hours before the alert went out and 181 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 76 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 2092 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

946 
WUUS54 KMOB 091154
SVRMOB
ALC023-025-091245-
/O.NEW.KMOB.SV.W.0047.210409T1154Z-210409T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
654 AM CDT Fri Apr 9 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  South central Choctaw County in southwestern Alabama...
  Northwestern Clarke County in southwestern Alabama...

* Until 745 AM CDT.

* At 653 AM CDT, a severe thunderstorm was located 5 miles north of
  Coffeeville, or 18 miles south of Butler, moving northeast at 35
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Thomasville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8807 3199 8767 3188 8767 3175 8815
      3184 8825 3200 8809
TIME...MOT...LOC 1153Z 245DEG 31KT 3184 8811 

HAIL...1.00IN
WIND...60MPH
 
$$

Black

2 follow-up statements

172 
WWUS54 KMOB 091210
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
710 AM CDT Fri Apr 9 2021

ALC023-091220-
/O.CAN.KMOB.SV.W.0047.000000T0000Z-210409T1245Z/
Choctaw AL-
710 AM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHOCTAW COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3199 8767 3188 8767 3179 8802 3189 8813
      3191 8813 3191 8810 3192 8807 3192 8806
      3193 8805 3194 8807 3192 8809 3194 8810
      3196 8809 3195 8808 3196 8807 3197 8807
      3199 8806
TIME...MOT...LOC 1210Z 245DEG 31KT 3190 8795 

$$

ALC025-091245-
/O.CON.KMOB.SV.W.0047.000000T0000Z-210409T1245Z/
Clarke AL-
710 AM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 AM CDT
FOR NORTHWESTERN CLARKE COUNTY...

At 710 AM CDT, a severe thunderstorm was located 9 miles southeast of
Putnam, or 12 miles west of Thomasville, moving northeast at 35 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Thomasville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8767 3188 8767 3179 8802 3189 8813
      3191 8813 3191 8810 3192 8807 3192 8806
      3193 8805 3194 8807 3192 8809 3194 8810
      3196 8809 3195 8808 3196 8807 3197 8807
      3199 8806
TIME...MOT...LOC 1210Z 245DEG 31KT 3190 8795 

HAIL...1.50IN
WIND...60MPH
 
$$

Black

580 
WWUS54 KMOB 091232
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
732 AM CDT Fri Apr 9 2021

ALC025-091241-
/O.CAN.KMOB.SV.W.0047.000000T0000Z-210409T1245Z/
Clarke AL-
732 AM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLARKE COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3199 8767 3188 8767 3179 8802 3189 8813
      3191 8813 3191 8810 3192 8807 3192 8806
      3193 8805 3194 8807 3192 8809 3194 8810
      3196 8809 3195 8808 3196 8807 3197 8807
      3199 8806
TIME...MOT...LOC 1229Z 245DEG 31KT 3198 8775 

$$

Black

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 10:33 PM CDT	Small Craft Advisory	MOB		41 hr
Apr 9, 2:57 AM CDT	Severe Thunderstorm Warning	MOB	Mobile	34 min
Apr 9, 3:30 AM CDT	Special Weather Statement	MOB	Mobile	45 min
Apr 9, 3:57 AM CDT	Special Marine Warning	MOB		93 min
Apr 9, 4:17 AM CDT	Special Weather Statement	MOB	Mobile	58 min
Apr 9, 4:25 AM CDT	Special Marine Warning	MOB		2 hr
Apr 9, 6:28 AM CDT	Special Marine Warning	MOB		2 hr
Apr 9, 6:42 AM CDT	Special Marine Warning	MOB		2 hr
Apr 9, 6:47 AM CDT	Special Weather Statement	MOB	Clarke	43 min
Apr 9, 7:02 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	43 min
Apr 9, 7:45 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Monroe	21 min
Apr 9, 8:06 AM CDT	Special Weather Statement	MOB	Clarke	39 min
Apr 9, 8:09 AM CDT	Special Marine Warning	MOB		96 min
Apr 9, 8:28 AM CDT	Special Marine Warning	MOB		105 min
Apr 9, 9:49 AM CDT	Special Marine Warning	MOB		54 min
Apr 9, 12:18 PM CDT	High Surf Advisory	MOB	Baldwin, Mobile	43 hr
Apr 9, 12:23 PM CDT	Special Weather Statement	MOB	Wilcox	52 min
Apr 9, 2:16 PM CDT	Special Weather Statement	MOB	Wilcox	44 min
Apr 9, 2:18 PM CDT	Special Weather Statement	MOB	Choctaw	42 min
Apr 9, 2:35 PM CDT	Special Weather Statement	MOB	Choctaw	40 min
Apr 9, 2:56 PM CDT	Special Weather Statement	MOB	Crenshaw	49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2021 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.