Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 137, NWS Birmingham, AL

July 31, 2021Tallapoosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 31, 2021, 4:45 PM CDT for Tallapoosa County, Alabama. It was in force for 45 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
Jul 31, 2021, 4:45 PM CDT (21:45 UTC)
Expired
Jul 31, 2021, 5:30 PM CDT
In force
45 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Tallapoosa County, AL

The radar

The Maxwell AFB radar (KMXX), 42 km from the middle of the area, began a volume at 21:48 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
Jul 31, 4:50 PM CDTTSTM WND DMG3 Ssw New Site, ALMULTIPLE TREES DOWN ON WHALEY FERRY ROAD SOUTH OF NEW SITE.
Jul 31, 4:54 PM CDTTSTM WND DMG3 Ssw Daviston, ALTREES AND POWERLINES DOWN ON COUNTY RD 79 SOUTHWEST OF DAVISTON.
Jul 31, 4:56 PM CDTTSTM WND DMG1 Nne Horseshoe Bend Nm, ALTREES DOWN AROUND IN SEVERAL LOCATIONS NEAR HORSESHOE BEND.

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 12:00Z, 9.8 hours before the alert went out and 103 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 2021-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1260 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 2021-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -46 square meters per square second.1939Sfc1 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
1260 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-46 m²/s²
0-3 km storm-relative helicity
-36 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

624 
WUUS54 KBMX 312145
SVRBMX
ALC123-312230-
/O.NEW.KBMX.SV.W.0137.210731T2145Z-210731T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
445 PM CDT Sat Jul 31 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northern Tallapoosa County in east central Alabama...

* Until 530 PM CDT.

* At 445 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles west of Wadley to near Alexander City,
  moving southeast at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Alexander City, Dadeville, Camp Hill, Jacksons' Gap, New Site,
  Goldville, Hillabee Creek, Northern Lake Martin, Daviston, Eagle
  Creek, Horseshoe Bend and Horseshoe Bend National Military Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3273 8564 3296 8598 3311 8590 3311 8559
      3284 8559
TIME...MOT...LOC 2145Z 297DEG 33KT 3314 8569 3295 8591 

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

87/GRANTHAM
2 follow-up statements
678 
WWUS54 KBMX 312157
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
457 PM CDT Sat Jul 31 2021

ALC123-312230-
/O.CON.KBMX.SV.W.0137.000000T0000Z-210731T2230Z/
Tallapoosa AL-
457 PM CDT Sat Jul 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHEASTERN TALLAPOOSA COUNTY...

At 457 PM CDT, severe thunderstorms were located along a line
extending from near Sparkling Springs to Dadeville, moving southeast
at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Dadeville, Camp Hill, Jacksons' Gap, Daviston, Eagle Creek, Horseshoe
Bend and Horseshoe Bend National Military Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3287 8585 3311 8568 3311 8559 3284 8559
      3273 8564
TIME...MOT...LOC 2157Z 302DEG 35KT 3310 8561 3284 8576 

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

87/GRANTHAM
765 
WWUS54 KBMX 312221
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
521 PM CDT Sat Jul 31 2021

ALC123-312231-
/O.EXP.KBMX.SV.W.0137.000000T0000Z-210731T2230Z/
Tallapoosa AL-
521 PM CDT Sat Jul 31 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TALLAPOOSA COUNTY
WILL EXPIRE AT 530 PM CDT...
            
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 will be allowed to expire.

LAT...LON 3287 8585 3311 8568 3311 8559 3284 8559
      3273 8564
TIME...MOT...LOC 2221Z 297DEG 33KT 3300 8539 3274 8554 

$$

87/GRANTHAM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:07 PM CDTSpecial Weather StatementBMXWinston38 min
Jul 30, 7:45 PM CDTSevere Thunderstorm WarningBMXCherokee, Etowah31 min
Jul 30, 7:51 PM CDTSevere Thunderstorm WarningBMXBlount39 min
Jul 31, 2:25 PM CDTSpecial Weather StatementBMXRussell50 min
Jul 31, 2:26 PM CDTSpecial Weather StatementBMXSt. Clair49 min
Jul 31, 2:28 PM CDTSpecial Weather StatementBMXChilton47 min
Jul 31, 2:29 PM CDTSpecial Weather StatementBMXDallas46 min
Jul 31, 2:44 PM CDTSpecial Weather StatementBMXShelby46 min
Jul 31, 2:47 PM CDTSpecial Weather StatementBMXJefferson, Walker43 min
Jul 31, 2:56 PM CDTSevere Thunderstorm WarningBMXBlount, Jefferson, Walker49 min
Jul 31, 3:04 PM CDTSevere Thunderstorm WarningBMXCalhoun, St. Clair, Talladega41 min
Jul 31, 3:09 PM CDTSpecial Weather StatementBMXChilton51 min
Jul 31, 3:11 PM CDTSpecial Weather StatementBMXRussell34 min
Jul 31, 3:23 PM CDTSpecial Weather StatementBMXCoosa37 min
Jul 31, 3:34 PM CDTSevere Thunderstorm WarningBMXJefferson, Shelby41 min
Jul 31, 3:38 PM CDTSevere Thunderstorm WarningBMXChilton, Coosa, Shelby, Talladega52 min
Jul 31, 3:41 PM CDTSpecial Weather StatementBMXTalladega34 min
Jul 31, 3:57 PM CDTSpecial Weather StatementBMXShelby33 min
Jul 31, 3:59 PM CDTSpecial Weather StatementBMXElmore, Montgomery46 min
Jul 31, 4:12 PM CDTSpecial Weather StatementBMXClay, Randolph48 min
Jul 31, 4:18 PM CDTSpecial Weather StatementBMXChambers42 min
Jul 31, 4:22 PM CDTSpecial Weather StatementBMXTallapoosa53 min
Jul 31, 4:49 PM CDTSpecial Weather StatementBMXBibb41 min
Jul 31, 5:00 PM CDTSpecial Weather StatementBMXLee60 min
Jul 31, 6:36 PM CDTSpecial Weather StatementBMXBarbour, Russell39 min

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.