Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 76, NWS Mobile, AL

September 1, 2021Clarke County, Wilcox County, Alabama

NWS Mobile, AL issued this flash flood warning at Sep 1, 2021, 7:03 PM CDT for Clarke County, Wilcox County, Alabama. It was in force for 4 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: Sep 1, 2021, 7:03 PM CDT (00:03 UTC)
Expired: Sep 1, 2021, 10:45 PM CDT
In force: 4 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Clarke County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 152 km from the middle of the area, began a volume at 00:06 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, 0.1 hours before the alert went out and 160 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: 241 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

278 
WGUS54 KMOB 020003
FFWMOB
ALC025-131-020600-
/O.NEW.KMOB.FF.W.0076.210902T0003Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
703 PM CDT Wed Sep 1 2021

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southwestern Wilcox County in south central Alabama...
  Northeastern Clarke County in southwestern Alabama...

* Until 100 AM CDT.

* At 703 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have likely fallen. 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...
  Thomasville, Pine Hill, Fulton, Yellow Bluff, Roundhill, Rural, 
  Finley Crossing, Atkeison, Hestle, Sunny South, Springfield, 
  Culpeper, Nettleboro, Dickinson, Greenwood, Scyrene, Glover, Lower 
  Peach Tree, Peacock and Tallahatta Springs.

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 3199 8767 3200 8767 3201 8762 3207 8762
      3206 8755 3192 8739 3171 8768 3183 8793
      3199 8800

FLASH FLOOD...RADAR INDICATED

$$

21/CLL

1 follow-up statement

282 
WGUS74 KMOB 020345
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
1045 PM CDT Wed Sep 1 2021

ALC025-131-020355-
/O.CAN.KMOB.FF.W.0076.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clarke AL-Wilcox AL-
1045 PM CDT Wed Sep 1 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN WILCOX AND 
NORTHEASTERN CLARKE COUNTIES...

Heavy rain has ended and flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3199 8767 3200 8767 3201 8762 3207 8762
      3206 8755 3192 8739 3171 8768 3183 8793
      3199 8800

$$

21/CLL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 7:21 PM CDT	Special Weather Statement	MOB	Escambia	54 min
Sep 1, 7:31 PM CDT	Special Weather Statement	MOB	Washington	44 min
Sep 1, 7:35 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	40 min
Sep 1, 7:45 PM CDT	Areal Flood Advisory	MOB	Covington, Escambia	3 hr
Sep 1, 8:14 PM CDT	Special Weather Statement	MOB	Escambia	46 min
Sep 1, 8:19 PM CDT	Special Weather Statement	MOB	Washington	41 min
Sep 1, 9:06 PM CDT	Areal Flood Advisory	MOB	Baldwin, Clarke, Escambia, Monroe	3 hr
Sep 1, 9:12 PM CDT	Special Weather Statement	MOB	Baldwin	63 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.