Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 51, NWS Birmingham, AL

October 3, 20214 counties in Alabama

NWS Birmingham, AL issued this flash flood warning at Oct 3, 2021, 9:05 PM CDT for 4 counties in Alabama. It was in force for 3 hr. 1 report 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
Oct 3, 2021, 9:05 PM CDT (02:05 UTC)
Expired
Oct 4, 2021, 12:15 AM CDT
In force
3 hr
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Flood severity
None

Counties Fayette County, AL, Jefferson County, AL, Marion County, AL, Walker County, AL

The radar

The Columbus AFB radar (KGWX), 75 km from the middle of the area, began a volume at 02:05 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
Oct 3, 9:10 PM CDTFLASH FLOOD1 Wnw Dora, ALAT LEAST 4 ROADS ARE FLOODED AND IMPASSABLE IN THE DORA AREA.

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, 2.1 hours before the alert went out and 102 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 2021-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 821 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2021-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.19395878Sfc1 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
821 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
626 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

434 
WGUS54 KBMX 040205
FFWBMX
ALC057-073-093-127-040515-
/O.NEW.KBMX.FF.W.0051.211004T0205Z-211004T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
905 PM CDT Sun Oct 3 2021

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Northwestern Jefferson County in central Alabama...
  Walker County in central Alabama...
  Southeastern Marion County in northwestern Alabama...
  Northeastern Fayette County in west central Alabama...

* Until 1215 AM CDT.

* At 905 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Jasper, Winfield, Sumiton, Cordova, Dora, Carbon Hill, Adamsville, 
  Graysville, Parrish, Oakman, Glen Allen, West Jefferson, Kansas, 
  Nauvoo, Gu-Win, Eldridge, Gorgas, Gorgas Steam Plant, Beloit and 
  Burnwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Move to higher ground now. Act quickly to protect your life.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3393 8794 3393 8775 3400 8762 3399 8733
      3385 8734 3371 8692 3357 8710 3380 8776

FLASH FLOOD...RADAR INDICATED

$$

75/Linhares
1 follow-up statement
806 
WGUS74 KBMX 040331
FFSBMX

Flash Flood Statement
National Weather Service Birmingham AL
1031 PM CDT Sun Oct 3 2021

ALC057-093-040341-
/O.CAN.KBMX.FF.W.0051.000000T0000Z-211004T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fayette AL-Marion AL-
1031 PM CDT Sun Oct 3 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MARION AND 
NORTHEASTERN FAYETTE COUNTIES...

Heavy rainfall has ended, and flash flooding is no longer expected 
to pose an immediate threat. Please continue to heed remaining road 
closures.

LAT...LON 3377 8726 3377 8711 3373 8697 3368 8697
      3360 8707 3361 8721 3372 8733

$$

ALC073-127-040515-
/O.CON.KBMX.FF.W.0051.000000T0000Z-211004T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson AL-Walker AL-
1031 PM CDT Sun Oct 3 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT MONDAY 
FOR NORTHWESTERN JEFFERSON AND SOUTHEASTERN WALKER COUNTIES...

At 1031 PM CDT, local law enforcement reported thunderstorms 
producing heavy rain across the warned area. Between 3 and 4 inches 
of rain have fallen. Additional rainfall amounts up to 0.5 inches 
are possible in the warned area. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Sumiton, Cordova, Dora, Adamsville, Parrish, West Jefferson, 
  Burnwell, Beloit, Gorgas Steam Plant, Quinton, Gorgas, Barney, 
  Miller Steam Plant, Goodsprings and Sayre.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3377 8726 3377 8711 3373 8697 3368 8697
      3360 8707 3361 8721 3372 8733

FLASH FLOOD...OBSERVED

$$

40/Sizemore

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 3, 8:04 PM CDTAreal Flood AdvisoryBMXFayette, Walker116 min
Oct 3, 10:59 PM CDTAreal Flood AdvisoryBMXJefferson3 hr
Oct 4, 12:53 AM CDTAreal Flood AdvisoryBMXJefferson, St. Clair, Shelby3 hr
Oct 4, 1:23 AM CDTDense Fog AdvisoryBMXBlount, Fayette, Lamar, Marion, Pickens, Tuscaloosa and 2 more8 hr
Oct 4, 3:11 AM CDTFlash Flood WatchBMXAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 30 more3 days
Oct 4, 9:37 AM CDTAreal Flood AdvisoryBMXLee3 hr
Oct 4, 11:51 AM CDTAreal Flood AdvisoryBMXRussell3 hr
Oct 4, 12:20 PM CDTFlash Flood WarningBMXLee, Russell3 hr
Oct 4, 12:44 PM CDTAreal Flood AdvisoryBMXLowndes, Montgomery3 hr
Oct 4, 1:33 PM CDTFlash Flood WarningBMXMontgomery87 min
Oct 4, 3:12 PM CDTSpecial Weather StatementBMXCoosa33 min
Oct 4, 3:21 PM CDTFlash Flood WarningBMXLee, Russell3 hr
Oct 4, 3:28 PM CDTFlash Flood WarningBMXLowndes, Montgomery3 hr
Oct 4, 4:40 PM CDTAreal Flood AdvisoryBMXChilton, Coosa3 hr
Oct 4, 4:56 PM CDTFlash Flood WarningBMXChilton3 hr
Oct 4, 5:09 PM CDTSpecial Weather StatementBMXBibb36 min
Oct 4, 5:09 PM CDTSpecial Weather StatementBMXShelby36 min
Oct 4, 5:16 PM CDTSevere Thunderstorm WarningBMXBibb29 min
Oct 4, 5:22 PM CDTSpecial Weather StatementBMXShelby23 min
Oct 4, 5:43 PM CDTSevere Thunderstorm WarningBMXShelby47 min
Oct 4, 5:47 PM CDTSevere Thunderstorm WarningBMXBibb, Shelby43 min
Oct 4, 6:02 PM CDTSpecial Weather StatementBMXShelby28 min
Oct 4, 6:17 PM CDTSpecial Weather StatementBMXJefferson28 min
Oct 4, 6:34 PM CDTSpecial Weather StatementBMXJefferson26 min

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