Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 95, NWS Mobile, AL

October 4, 2021Wilcox County, Alabama

NWS Mobile, AL issued this flash flood warning at Oct 4, 2021, 1:47 PM CDT for Wilcox County, Alabama. It was in force for 5 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 4, 2021, 1:47 PM CDT (18:47 UTC)
Expired
Oct 4, 2021, 7:00 PM CDT
In force
5 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 133 km from the middle of the area, began a volume at 18:46 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 4, 2:40 PM CDTFLASH FLOOD2 Nw Camden, ALKENNEDY STREET CLOSED DUE TO FLOODING.

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 12:00Z, 6.8 hours before the alert went out and 134 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 12:00Z on 2021-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 565 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 12:00Z on 2021-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.193958Sfc1 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
565 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
616 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

910 
WGUS54 KMOB 041847
FFWMOB
ALC131-050000-
/O.NEW.KMOB.FF.W.0095.211004T1847Z-211005T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
147 PM CDT Mon Oct 4 2021

The National Weather Service in Mobile has issued a

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

* Until 700 PM CDT.

* At 147 PM CDT, Doppler radar indicated slow moving thunderstorms 
  across the warned area. Between 2 and 3 inches of rain have fallen 
  between Millers Ferry and Camden within the last hour. Additional 
  rainfall amounts of 2 to 3 inches are possible in the warned area 
  in the next hour or two. 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...
  Camden, Pine Hill, Yellow Bluff, Rockwest, Pebble Hill, Coal 
  Bluff, Coy, Sheppard, Shawnee, Estelle, MacMillan, Darlington and 
  Culpeper.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3204 8715 3202 8713 3197 8711 3187 8758
      3200 8759 3211 8725 3211 8724 3210 8722
      3209 8719 3207 8719 3206 8718 3204 8718

FLASH FLOOD...RADAR INDICATED

$$
1 follow-up statement
166 
WGUS74 KMOB 042011
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
311 PM CDT Mon Oct 4 2021

ALC131-050000-
/O.CON.KMOB.FF.W.0095.000000T0000Z-211005T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wilcox AL-
311 PM CDT Mon Oct 4 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING 
FOR SOUTHWESTERN WILCOX COUNTY...

At 311 PM CDT, Wilcox County Emergency Management reported flooding 
on the north side of Camden with Kennedy Street closed. Between 2 
and 4 inches of rain have already fallen. While the heavy rain has 
diminished over the past half hour, it is possible additional heavy 
rain may move in from the west over the next hour or two. This 
additional heavy rain combined with ongoing runoff could result in 
additional flash flooding.


HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management 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...
  Camden, Pine Hill, Yellow Bluff, Rockwest, Pebble Hill, Coal 
  Bluff, Coy, Sheppard, Shawnee, Estelle, MacMillan, Darlington and 
  Culpeper.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3204 8715 3202 8713 3197 8711 3187 8758
      3200 8759 3211 8725 3211 8724 3210 8722
      3209 8719 3207 8719 3206 8718 3204 8718

FLASH FLOOD...OBSERVED

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 4, 3:30 AM CDTFlash Flood WatchMOBBaldwin, Butler, Clarke, Conecuh, Covington, Crenshaw and 3 more3 days
Oct 4, 5:33 AM CDTAreal Flood AdvisoryMOBBaldwin, Mobile3 hr
Oct 4, 6:45 AM CDTFlash Flood WarningMOBBaldwin6 hr
Oct 4, 9:06 AM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Oct 4, 1:28 PM CDTAreal Flood AdvisoryMOBWilcox2 hr
Oct 4, 3:22 PM CDTAreal Flood AdvisoryMOBClarke98 min
Oct 4, 4:37 PM CDTAreal Flood AdvisoryMOBClarke, Washington, Wilcox3 hr
Oct 4, 5:58 PM CDTAreal Flood AdvisoryMOBClarke, Monroe, Washington2 hr

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.