Flash Flood Warning 20, NWS Birmingham, AL

Issued

May 4, 2021, 4:01 PM CDT (21:01 UTC)

Expired

May 4, 2021, 7:22 PM CDT

In force

3 hr

Issued by

NWS Birmingham, AL

Area

Storm-based polygon

Flood severity

None

Counties Shelby County, AL, Talladega County, AL

The Birmingham radar (KBMX), 46 km from the middle of the area, began a volume at 21:02 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.

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

496 
WGUS54 KBMX 042101
FFWBMX
ALC117-121-050100-
/O.NEW.KBMX.FF.W.0020.210504T2101Z-210505T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
401 PM CDT Tue May 4 2021

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Southern Shelby County in central Alabama...
  Talladega County in east central Alabama...

* Until 800 PM CDT.

* At 401 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. 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...
  Alabaster, Oxford, Talladega, Sylacauga, Calera, Montevallo, 
  Childersburg, Columbiana, Wilsonville, Talladega Springs, Lincoln, 
  Vincent, Harpersville, Munford, Wilton, Oak Grove, Waldo, Bon Air, 
  Logan Martin Dam and Alpine.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3311 8697 3340 8635 3351 8628 3349 8625
      3354 8617 3358 8580 3351 8584 3350 8590
      3340 8592 3338 8598 3329 8600 3329 8612
      3319 8612 3320 8617 3311 8617 3310 8649
      3304 8652 3304 8658 3307 8661 3304 8690

FLASH FLOOD...RADAR INDICATED

$$

40/Sizemore

263 
WGUS74 KBMX 042219
FFSBMX

Flash Flood Statement
National Weather Service Birmingham AL
519 PM CDT Tue May 4 2021

ALC117-121-050100-
/O.CON.KBMX.FF.W.0020.000000T0000Z-210505T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shelby AL-Talladega AL-
519 PM CDT Tue May 4 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING 
FOR SOUTHERN SHELBY AND TALLADEGA COUNTIES...

At 519 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2 and 4 inches of rain have 
fallen. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Doppler radar.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Alabaster, Oxford, Talladega, Sylacauga, Calera, Montevallo, 
  Childersburg, Columbiana, Wilsonville, Talladega Springs, Lincoln, 
  Vincent, Harpersville, Munford, Wilton, Oak Grove, Waldo, Bon Air, 
  Logan Martin Dam and Alpine.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3311 8697 3340 8635 3351 8628 3349 8625
      3354 8617 3358 8580 3351 8584 3350 8590
      3340 8592 3338 8598 3329 8600 3329 8612
      3319 8612 3320 8617 3311 8617 3310 8649
      3304 8652 3304 8658 3307 8661 3304 8690

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

40/Sizemore

926 
WGUS74 KBMX 050022
FFSBMX

Flash Flood Statement
National Weather Service Birmingham AL
722 PM CDT Tue May 4 2021

ALC117-121-050032-
/O.CAN.KBMX.FF.W.0020.000000T0000Z-210505T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shelby AL-Talladega AL-
722 PM CDT Tue May 4 2021

...FLASH FLOOD WARNING FOR SOUTHERN SHELBY AND TALLADEGA COUNTIES 
HAS BEEN REPLACED WITH A FLOOD WARNING...

The heavy rain has ended, but flooding continues across the warned 
area. Please continue to heed remaining road closures.

LAT...LON 3311 8697 3340 8635 3351 8628 3349 8625
      3354 8617 3358 8580 3351 8584 3350 8590
      3340 8592 3338 8598 3329 8600 3329 8612
      3319 8612 3320 8617 3311 8617 3310 8649
      3304 8652 3304 8658 3307 8661 3304 8690

$$

40/Sizemore

Flash Flood Warnings in Alabama, 2021Every flash flood warning in 2021

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.