Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 22, NWS Birmingham, AL

March 25, 2021Chilton County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 25, 2021, 8:33 PM CDT for Chilton County, Alabama. It was in force for 42 min. 3 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
Mar 25, 2021, 8:33 PM CDT (01:33 UTC)
Expired
Mar 25, 2021, 9:15 PM CDT
In force
42 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Chilton County, AL

The radar

The Birmingham radar (KBMX), 39 km from the middle of the area, began a volume at 01:33 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

TimeReportWhereRemark
Mar 25, 8:49 PM CDTHAIL 1.251 W Clanton, ALLASTED ABOUT 3 MINUTES.
Mar 25, 9:01 PM CDTTORNADO2 N Cooper, ALAN EF2 TORNADO MOVES THROUGH EASTERN CHILTON AND WESTERN COOSA COUNTIES, DAMAGING HOMES ALONG LAKE MITCHELL AND DOWNING NUMEROUS TREES.
Mar 25, 9:10 PM CDTTORNADO3 Sw Higgins Ferry Park, ALTDS DETECTED ON RADAR. MULTIPLE STRUCTURES DAMAGED ON CR 481 ON CARGILE CREEK. ADDITIONAL STRUCTURES WERE DAMAGED ALONG CR 483 AND ON CR 720. NUMEROUS TREES WERE ALSO DOWNED.

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.

IssuedProductOfficeLasted
Mar 25, 7:47 PM CDTTornado WatchSPC3 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.6 hours before the alert went out and 40 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 2021-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1313 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 2021-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 341 square meters per square second.1939587897Sfc1 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
1313 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
3.1
Supercell composite
13.2

Open this sounding in Storm Lab

The text

As transmitted.

094 
WUUS54 KBMX 260133
SVRBMX
ALC021-260215-
/O.NEW.KBMX.SV.W.0022.210326T0133Z-210326T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
833 PM CDT Thu Mar 25 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southern Chilton County in central Alabama...

* Until 915 PM CDT.

* At 833 PM CDT, a severe thunderstorm was located over Parnell, or
  14 miles north of Valley Grande, moving northeast at 65 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...
  Clanton, Thorsby, Maplesville, Plecher, Gap Of The Mountain,
  Parnell, Lay Lake Dam, Higgins Ferry Park, Pooles Crossroads,
  Mitchell Lake, Lay Lake, Lomax, Stanton, I 65 Rest Area, Mitchell
  Dam, Isabella and Cooper.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central, south
central and east central Alabama.

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

&&

LAT...LON 3271 8702 3278 8702 3284 8689 3284 8688
      3285 8687 3300 8652 3299 8651 3293 8651
      3287 8648 3286 8645 3283 8646 3280 8644
      3266 8691 3266 8700
TIME...MOT...LOC 0133Z 245DEG 58KT 3273 8693 

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

32/Davis
3 follow-up statements
846 
WWUS54 KBMX 260138
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
838 PM CDT Thu Mar 25 2021

ALC021-260215-
/O.CON.KBMX.SV.W.0022.000000T0000Z-210326T0215Z/
Chilton AL-
838 PM CDT Thu Mar 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR SOUTHEASTERN CHILTON COUNTY...

At 838 PM CDT, a severe thunderstorm was located over Maplesville, or
15 miles southwest of Clanton, moving northeast at 60 mph.

HAZARD...Golf 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...
Clanton, Thorsby, Maplesville, Plecher, Gap Of The Mountain, Parnell,
Lay Lake Dam, Higgins Ferry Park, Pooles Crossroads, Mitchell Lake,
Lay Lake, Lomax, Stanton, I 65 Rest Area, Mitchell Dam, Isabella and
Cooper.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central, south
central and east central Alabama.

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

&&

LAT...LON 3271 8699 3277 8698 3284 8689 3284 8688
      3285 8687 3300 8652 3299 8651 3293 8651
      3287 8648 3286 8645 3283 8646 3280 8644
      3266 8691 3266 8697
TIME...MOT...LOC 0138Z 245DEG 53KT 3274 8688 

HAIL...1.75IN
WIND...60MPH
 
$$

32/Davis
277 
WWUS54 KBMX 260146
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
846 PM CDT Thu Mar 25 2021

ALC021-260215-
/O.CON.KBMX.SV.W.0022.000000T0000Z-210326T0215Z/
Chilton AL-
846 PM CDT Thu Mar 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR CENTRAL CHILTON COUNTY...

At 846 PM CDT, a severe thunderstorm was located near Pooles
Crossroads, or near Clanton, moving northeast at 65 mph.

HAZARD...Two inch 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...
Clanton, Thorsby, Plecher, Gap Of The Mountain, Lay Lake Dam, Higgins
Ferry Park, Pooles Crossroads, Mitchell Lake, Lay Lake, Lomax, I 65
Rest Area, Mitchell Dam, Isabella and Cooper.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central and
east central Alabama.

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

&&

LAT...LON 3275 8686 3279 8685 3282 8686 3285 8684
      3300 8652 3299 8651 3293 8651 3287 8648
      3286 8645 3283 8646 3280 8644 3268 8684
      3271 8688
TIME...MOT...LOC 0146Z 245DEG 58KT 3280 8674 

HAIL...2.00IN
WIND...60MPH
 
$$

32/Davis
524 
WWUS54 KBMX 260203
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
903 PM CDT Thu Mar 25 2021

ALC021-260215-
/O.CON.KBMX.SV.W.0022.000000T0000Z-210326T0215Z/
Chilton AL-
903 PM CDT Thu Mar 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR EASTERN CHILTON COUNTY...

At 903 PM CDT, a severe thunderstorm was located near Mitchell Lake,
or near Clanton, moving east at 55 mph.

HAZARD...Golf 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...
Clanton, Gap Of The Mountain, Higgins Ferry Park, Lay Lake Dam,
Mitchell Lake, Lay Lake, I 65 Rest Area, Mitchell Dam and Cooper.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central and
east central Alabama.

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

&&

LAT...LON 3284 8664 3292 8664 3300 8652 3299 8651
      3293 8651 3287 8648 3286 8645 3283 8646
      3280 8644 3274 8665
TIME...MOT...LOC 0203Z 252DEG 47KT 3283 8653 

HAIL...1.75IN
WIND...60MPH
 
$$

32/Davis

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 25, 7:04 PM CDTSpecial Weather StatementBMXCalhoun26 min
Mar 25, 7:07 PM CDTTornado WarningBMXMarengo24 min
Mar 25, 7:10 PM CDTSpecial Weather StatementBMXHale50 min
Mar 25, 7:16 PM CDTSevere Thunderstorm WarningBMXGreene, Hale32 min
Mar 25, 7:17 PM CDTAreal Flood AdvisoryBMXCalhoun, Cherokee, Cleburne14 min
Mar 25, 7:31 PM CDTFlash Flood WarningBMXCalhoun, Cherokee, Cleburne3 hr
Mar 25, 7:34 PM CDTSevere Thunderstorm WarningBMXBibb, Tuscaloosa23 min
Mar 25, 7:48 PM CDTSpecial Weather StatementBMXJefferson27 min
Mar 25, 8:28 PM CDTSevere Thunderstorm WarningBMXBlount, Jefferson, St. Clair28 min
Mar 25, 8:51 PM CDTSevere Thunderstorm WarningBMXBlount, Etowah, St. Clair25 min
Mar 25, 8:58 PM CDTSevere Thunderstorm WarningBMXCoosa49 min
Mar 25, 9:01 PM CDTRiver Flood WarningBMXBibb, Jefferson, Shelby24 hr
Mar 25, 9:04 PM CDTTornado WarningBMXChilton, Coosa32 min
Mar 25, 9:21 PM CDTRiver Flood WarningBMXJefferson, Tuscaloosa, Walker12 hr
Mar 25, 9:23 PM CDTRiver Flood WarningBMXJefferson, Tuscaloosa, Walker60 hr
Mar 25, 9:41 PM CDTRiver Flood WarningBMXGreene, Hale, Tuscaloosa24 hr
Mar 25, 9:44 PM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Tuscaloosa60 hr
Mar 25, 9:47 PM CDTRiver Flood WarningBMXSumter12 hr
Mar 25, 9:49 PM CDTRiver Flood WarningBMXGreene, Pickens, Sumter5 days
Mar 25, 9:51 PM CDTTornado WarningBMXChambers, Clay, Randolph, Tallapoosa54 min
Mar 25, 11:20 PM CDTAreal Flood WarningBMXBlount, Jefferson, St. Clair6 hr
Mar 25, 11:55 PM CDTRiver Flood WarningBMXCalhoun, Cherokee, Etowah, St. Clair58 hr
Mar 26, 5:26 AM CDTRiver Flood WarningBMXChilton, Coosa, Elmore, Shelby, Talladega4 days
Mar 26, 5:32 AM CDTAreal Flood WarningBMXCherokee6 days

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.