Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 57, NWS Birmingham, AL

October 5, 2021Chambers County, Lee County, Alabama

NWS Birmingham, AL issued this flash flood warning at Oct 5, 2021, 12:38 AM CDT for Chambers County, Lee County, 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 5, 2021, 12:38 AM CDT (05:38 UTC)
Expired: Oct 5, 2021, 3:45 AM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Chambers County, AL, Lee County, AL

The radar

The Maxwell AFB radar (KMXX), 58 km from the middle of the area, began a volume at 05:38 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

Time	Report	Where	Remark
Oct 5, 2:00 AM CDT	FLASH FLOOD	1 S Lanett, AL	FLASH FLOODING OCCURRED MOSTLY IN THE VICINITY OF MOORES CREEK THAT IMPACTED PORTIONS OF HIGHWAY 29. A FEW REPORTS OF FLOODING WERE RECEIVED FROM LANETT AND IN VALLEY. TIME APPROXIMATE.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.6 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 126 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 846 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

936 
WGUS54 KBMX 050538
FFWBMX
ALC017-081-050845-
/O.NEW.KBMX.FF.W.0057.211005T0538Z-211005T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
1238 AM CDT Tue Oct 5 2021

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Southeastern Chambers County in east central Alabama...
  North Central Lee County in east central Alabama...

* Until 345 AM CDT.

* At 1238 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 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...
  Opelika, Valley, Lanett, Lakeview, Cusseta, Chambers County Lake, 
  Huguley, Oak Bowery, Sturkie, Fairfax, River View, Mount 
  Jefferson, Lanett Municipal Airport and I 85 Welcome Center At 
  Lanett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3279 8552 3285 8540 3292 8530 3295 8520
      3286 8518 3285 8518 3286 8516 3284 8515
      3283 8517 3281 8517 3279 8515 3279 8514
      3277 8512 3268 8535 3268 8552

FLASH FLOOD...RADAR INDICATED

$$

87/Grantham

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 4, 11:46 PM CDT	Areal Flood Advisory	BMX	Chambers, Lee	3 hr
Oct 5, 3:27 AM CDT	Areal Flood Advisory	BMX	Barbour, Bullock, Lee, Macon, Pike, Russell	3 hr
Oct 5, 5:23 AM CDT	Flash Flood Warning	BMX	Chambers, Lee	5 hr
Oct 5, 5:27 AM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	3 hr
Oct 5, 6:25 AM CDT	Flash Flood Warning	BMX	Shelby	2 hr
Oct 5, 7:53 AM CDT	Areal Flood Advisory	BMX	Bibb, Hale, Tuscaloosa	3 hr
Oct 5, 3:49 PM CDT	Areal Flood Advisory	BMX	Marion	116 min
Oct 5, 4:09 PM CDT	Areal Flood Advisory	BMX	Tuscaloosa	3 hr
Oct 5, 5:25 PM CDT	Special Weather Statement	BMX	Lamar	35 min
Oct 5, 6:43 PM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	6 hr

Nearby

Flash Flood Warnings in Alabama, 2021 Every 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.