Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS Birmingham, AL

March 25, 2021Calhoun County, Cherokee County, Cleburne County, Alabama

NWS Birmingham, AL issued this flash flood warning at Mar 25, 2021, 7:31 PM CDT for Calhoun County, Cherokee County, Cleburne County, Alabama. It was in force for 3 hr. 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 25, 2021, 7:31 PM CDT (00:31 UTC)
Expired
Mar 25, 2021, 11:00 PM CDT
In force
3 hr
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Flood severity
None

Counties Calhoun County, AL, Cherokee County, AL, Cleburne County, AL

The radar

The Birmingham radar (KBMX), 110 km from the middle of the area, began a volume at 00:36 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, 0.5 hours before the alert went out and 110 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.

757 
WGUS54 KBMX 260031
FFWBMX
ALC015-019-029-260230-
/O.NEW.KBMX.FF.W.0009.210326T0031Z-210326T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
731 PM CDT Thu Mar 25 2021

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Calhoun County in east central Alabama...
  Northeastern Cleburne County in east central Alabama...
  Southeastern Cherokee County in northeastern Alabama...

* Until 930 PM CDT.

* At 731 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Anniston, Jacksonville, Piedmont, Fort McClellan, Saks, West 
  End-Cobb Town, Cobb Town, Weaver, Jacksonville State University, 
  Alexandria, Blue Mountain, Pleasant Gap, Bynum, Mars Hills, 
  Sulphur Springs, Liberty Hill, Coleman Lake And Campground, 
  Wellington, Spring Garden and Oak Level.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3401 8541 3384 8537 3359 8599 3360 8600
      3360 8602 3365 8603 3367 8605 3369 8610
      3393 8580

FLASH FLOOD...RADAR INDICATED

$$

88
1 follow-up statement
306 
WGUS54 KBMX 260216
FFWBMX
ALC015-019-029-260400-
/O.EXT.KBMX.FF.W.0009.000000T0000Z-210326T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
916 PM CDT Thu Mar 25 2021

The National Weather Service in Birmingham has extended the

* Flash Flood Warning for...
  Calhoun County in east central Alabama...
  Northeastern Cleburne County in east central Alabama...
  Southeastern Cherokee County in northeastern Alabama...

* Until 1100 PM CDT.

* At 916 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain will affect the warned area. Flash flooding is ongoing 
  or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Anniston, Jacksonville, Piedmont, Fort McClellan, Saks, West 
  End-Cobb Town, Cobb Town, Weaver, Jacksonville State University, 
  Alexandria, Blue Mountain, Pleasant Gap, Bynum, Mars Hills, 
  Sulphur Springs, Liberty Hill, Coleman Lake And Campground, 
  Wellington, Spring Garden and Oak Level.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3401 8541 3384 8537 3359 8599 3360 8600
      3360 8602 3365 8603 3367 8605 3369 8610
      3393 8580

FLASH FLOOD...RADAR INDICATED

$$

88

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, 7:34 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, 8:33 PM CDTSevere Thunderstorm WarningBMXChilton42 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

Flash Flood Warnings in Alabama, 2021Every flash flood 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.