Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 121, NWS Mobile, AL

May 4, 2021Covington County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 4, 2021, 7:44 PM CDT for Covington County, Crenshaw County, Alabama. It was in force for 32 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: May 4, 2021, 7:44 PM CDT (00:44 UTC)
Expired: May 4, 2021, 8:16 PM CDT
In force: 32 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Covington County, AL, Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 78 km from the middle of the area, began a volume at 00:44 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
May 4, 7:50 PM CDT	TSTM WND DMG	2 Sse Brantley, AL	FALLEN TREE AT MILE MARKER 32 ON HWY 189.
May 4, 7:51 PM CDT	TSTM WND DMG	3 Wnw Bullock, AL	LARGE TREE FALLEN ON ROAD ON ELBA HWY AT POWELL RD.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 4, 6:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.7 hours before the alert went out and 222 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: 1458 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

As transmitted.

328 
WUUS54 KMOB 050044
SVRMOB
ALC039-041-050130-
/O.NEW.KMOB.SV.W.0121.210505T0044Z-210505T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
744 PM CDT Tue May 4 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southeastern Crenshaw County in south central Alabama...
  Covington County in south central Alabama...

* Until 830 PM CDT.

* At 743 PM CDT, severe thunderstorms were located along a line
  extending from 3 miles southeast of Goshen to 5 miles north of Opp
  to 12 miles northwest of Laurel Hill, moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Andalusia, Opp, River Falls and Heath. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3153 8616 3153 8620 3103 8619 3109 8670
      3129 8670 3147 8636 3164 8617 3162 8618
      3162 8615 3156 8614
TIME...MOT...LOC 0043Z 256DEG 31KT 3167 8609 3135 8629 3113 8656 

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

Black

2 follow-up statements

141 
WWUS54 KMOB 050053
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
753 PM CDT Tue May 4 2021

ALC041-050102-
/O.CAN.KMOB.SV.W.0121.000000T0000Z-210505T0130Z/
Crenshaw AL-
753 PM CDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CRENSHAW COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
south central Alabama.

LAT...LON 3103 8619 3109 8670 3127 8665 3139 8633
      3142 8620
TIME...MOT...LOC 0052Z 256DEG 31KT 3169 8600 3137 8620 3115 8647 

$$

ALC039-050130-
/O.CON.KMOB.SV.W.0121.000000T0000Z-210505T0130Z/
Covington AL-
753 PM CDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR CENTRAL COVINGTON COUNTY...

At 752 PM CDT, severe thunderstorms were located along a line
extending from 7 miles east of Goshen to 6 miles northeast of Opp to
10 miles south of Andalusia, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Andalusia and Opp. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3103 8619 3109 8670 3127 8665 3139 8633
      3142 8620
TIME...MOT...LOC 0052Z 256DEG 31KT 3169 8600 3137 8620 3115 8647 

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

Black

262 
WWUS54 KMOB 050116
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
816 PM CDT Tue May 4 2021

ALC039-050124-
/O.CAN.KMOB.SV.W.0121.000000T0000Z-210505T0130Z/
Covington AL-
816 PM CDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL COVINGTON COUNTY IS
CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
south central Alabama.

LAT...LON 3103 8619 3109 8670 3127 8665 3139 8633
      3142 8620
TIME...MOT...LOC 0113Z 256DEG 31KT 3174 8579 3142 8599 3120 8626 

$$

Black

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 7:26 PM CDT	Special Marine Warning	MOB		2 hr
May 4, 7:28 PM CDT	Special Weather Statement	MOB	Covington, Escambia	62 min
May 4, 7:33 PM CDT	Special Weather Statement	MOB	Baldwin, Mobile	57 min
May 4, 8:15 PM CDT	River Flood Warning	MOB	Baldwin	29 hr
May 4, 8:20 PM CDT	Areal Flood Advisory	MOB	Mobile	6 hr
May 4, 8:28 PM CDT	Areal Flood Advisory	MOB	Baldwin	6 hr
May 4, 8:36 PM CDT	Flash Flood Warning	MOB	Mobile	6 hr
May 4, 9:41 PM CDT	Special Marine Warning	MOB		94 min
May 5, 12:35 AM CDT	Areal Flood Advisory	MOB	Baldwin	4 hr
May 5, 1:50 AM CDT	Flash Flood Warning	MOB	Baldwin	6 hr
May 5, 2:27 AM CDT	River Flood Warning	MOB	Baldwin	23 hr
May 5, 2:30 AM CDT	River Flood Warning	MOB	Baldwin	22 hr
May 5, 2:50 AM CDT	Special Marine Warning	MOB		85 min
May 5, 6:29 AM CDT	Special Weather Statement	MOB	Baldwin	46 min
May 5, 7:07 AM CDT	Areal Flood Advisory	MOB	Mobile	3 hr
May 5, 7:19 AM CDT	Special Marine Warning	MOB		86 min
May 5, 7:43 AM CDT	Flash Flood Warning	MOB	Baldwin	6 hr
May 5, 8:00 AM CDT	River Flood Warning	MOB	Clarke, Monroe, Wilcox	7 days
May 5, 8:00 AM CDT	River Flood Warning	MOB	Dallas, Monroe, Wilcox	4 days
May 5, 8:31 AM CDT	Special Marine Warning	MOB		59 min
May 5, 8:57 AM CDT	Flash Flood Warning	MOB	Mobile	4 hr
May 5, 12:02 PM CDT	Special Marine Warning	MOB		88 min
May 5, 1:24 PM CDT	Areal Flood Advisory	MOB	Mobile	96 min
May 5, 1:26 PM CDT	Special Marine Warning	MOB		64 min
May 5, 1:44 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr

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.