Alert archive / Alabama / Areal Flood Warnings in 2021

Areal Flood Warning 12, NWS Mobile, AL

August 30, 2021George County, Mississippi; 4 counties in Alabama

NWS Mobile, AL issued this areal flood warning at Aug 30, 2021, 5:19 PM CDT for George County, Mississippi; 4 counties in Alabama. It was in force for 14 hr. 2 reports 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
Aug 30, 2021, 5:19 PM CDT (22:19 UTC)
Expired
Aug 31, 2021, 7:00 AM CDT
In force
14 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Baldwin County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, George County, MS

The radar

The Mobile radar (KMOB), 28 km from the middle of the area, began a volume at 22:23 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
Aug 31, 12:15 AM CDTFLASH FLOOD1 E Lucedale, MSFLOODING REPORTED ALONG HWY. 198 IN LUCEDALE NEAR THE RAILROAD UNDERPASS.
Aug 31, 5:17 AM CDTFLASH FLOOD2 Nnw Tillmans Corner, ALPUBLIC REPORT OF LOW WATER CROSSING FLOODED DUE TO HEAVY RAINFALL.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.3 hours before the alert went out and 148 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, Slidell Radar S, LA at 12:00Z on 2021-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 881 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2021-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 386 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
881 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
560 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
386 m²/s²
0-3 km storm-relative helicity
386 m²/s²
Significant tornado parameter
1.1
Supercell composite
9.7

Open this sounding in Storm Lab

The text

As transmitted.

309 
WGUS44 KMOB 302219
FLWMOB

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mobile AL
519 PM CDT Mon Aug 30 2021

ALC003-025-097-129-MSC039-311000-
/O.NEW.KMOB.FA.W.0012.210830T2219Z-210831T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Clarke AL-Mobile AL-Washington AL-George MS-
519 PM CDT Mon Aug 30 2021

The National Weather Service in Mobile has issued a

* Flood Warning for...
  Northwestern Baldwin County in southwestern Alabama...
  South Central Clarke County in southwestern Alabama...
  Mobile County in southwestern Alabama...
  Southern Washington County in southwestern Alabama...
  Eastern George County in southeastern Mississippi...

* Until 500 AM CDT Tuesday.

* At 519 PM CDT, Doppler radar indicated heavy rain had fallen 
  throughout the day Monday. Flooding is already occurring in the 
  warned area. Between 5 and 10 inches of rain had fallen.

* Some locations that will experience flooding include...
  Downtown Mobile, Midtown Mobile, Prichard, Daphne, Tillmans 
  Corner, Saraland, Bay Minette, Theodore, Chickasaw, Satsuma, 
  Spanish Fort, Grand Bay, Citronelle, Lucedale, Creola, Loxley, 
  Chunchula, Stockton, Stapleton and Wagarville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3073 8877 3096 8863 3100 8848 3100 8843
      3144 8830 3144 8787 3067 8756 3040 8838
      3074 8841

$$
2 follow-up statements
004 
WGUS44 KMOB 310930
FLWMOB

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mobile AL
430 AM CDT Tue Aug 31 2021

ALC003-025-097-129-MSC039-311200-
/O.EXT.KMOB.FA.W.0012.000000T0000Z-210831T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Clarke AL-Mobile AL-Washington AL-George MS-
430 AM CDT Tue Aug 31 2021

The National Weather Service in Mobile has extended the

* Flood Warning for...
  Northwestern Baldwin County in southwestern Alabama...
  South Central Clarke County in southwestern Alabama...
  Mobile County in southwestern Alabama...
  Southern Washington County in southwestern Alabama...
  Eastern George County in southeastern Mississippi...

* Until 700 AM CDT.

* At 430 AM CDT, Doppler radar indicated heavy rain. Flooding is 
  already occurring in the warned area. Between 6 and 13 inches of 
  rain have fallen.

* Some locations that will experience flooding include...
  Downtown Mobile, Midtown Mobile, Prichard, Daphne, Tillmans 
  Corner, Saraland, Bay Minette, Theodore, Chickasaw, Satsuma, 
  Spanish Fort, Grand Bay, Citronelle, Lucedale, Creola, Loxley, 
  Chunchula, Stockton, Stapleton and Wagarville.

Additional rainfall amounts of 1 to 3 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.

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

&&

LAT...LON 3073 8877 3096 8863 3100 8848 3100 8843
      3144 8830 3144 8787 3067 8756 3040 8838
      3074 8841

$$

MM
508 
WGUS84 KMOB 311200
FLSMOB

Flood Statement
National Weather Service Mobile AL
700 AM CDT Tue Aug 31 2021

ALC003-025-097-129-MSC039-311210-
/O.EXP.KMOB.FA.W.0012.000000T0000Z-210831T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Clarke AL-Mobile AL-Washington AL-George MS-
700 AM CDT Tue Aug 31 2021

...FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN BALDWIN, SOUTH CENTRAL 
CLARKE, MOBILE, SOUTHERN WASHINGTON AND EASTERN GEORGE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3073 8877 3096 8863 3100 8848 3100 8843
      3144 8830 3144 8787 3067 8756 3040 8838
      3074 8841

$$

MM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 7:07 PM CDTTornado WarningMOBGeorge25 min
Aug 29, 11:30 PM CDTFlash Flood WarningMOBStone6 hr
Aug 30, 12:29 AM CDTFlash Flood WarningMOBGeorge, Perry, Stone6 hr
Aug 30, 3:24 AM CDTFlash Flood WarningMOBGeorge, Greene, Perry6 hr
Aug 30, 3:39 AM CDTTornado WarningMOBGeorge, Greene, Perry20 min
Aug 30, 6:05 AM CDTFlash Flood WarningMOBStone4 hr
Aug 30, 6:20 AM CDTFlash Flood WarningMOBGeorge, Greene, Perry, Stone5 hr
Aug 30, 9:20 AM CDTAreal Flood WarningMOBGeorge, Greene, Perry8 hr
Aug 30, 2:32 PM CDTTornado WarningMOBWayne21 min
Aug 30, 6:28 PM CDTSpecial Weather StatementMOBGeorge47 min
Aug 29, 8:19 PM CDTRiver Flood WarningMOBEscambia49 hr
Aug 29, 8:21 PM CDTRiver Flood WarningMOBCovington, Escambia38 hr
Aug 29, 8:35 PM CDTRiver Flood WarningMOBBaldwin30 hr
Aug 29, 11:27 PM CDTSpecial Marine WarningMOB93 min
Aug 30, 12:13 AM CDTSpecial Marine WarningMOB47 min
Aug 30, 12:59 AM CDTSpecial Marine WarningMOB2 hr
Aug 30, 4:03 AM CDTSpecial Marine WarningMOB117 min
Aug 30, 6:42 AM CDTFlash Flood WarningMOBBaldwin, Escambia5 hr
Aug 30, 6:46 AM CDTSpecial Marine WarningMOB119 min
Aug 30, 8:29 AM CDTFlash Flood WarningMOBConecuh, Escambia, Monroe4 hr
Aug 30, 8:32 AM CDTFlash Flood WarningMOBEscambia4 hr
Aug 30, 8:40 AM CDTTornado WarningMOBConecuh, Escambia50 min
Aug 30, 9:00 AM CDTFlash Flood WarningMOBClarke, Conecuh, Escambia, Monroe, Wilcox4 hr
Aug 30, 9:12 AM CDTFlash Flood WarningMOBConecuh, Escambia4 hr
Aug 30, 10:26 AM CDTFlash Flood WarningMOBMobile6 hr
Aug 30, 10:51 AM CDTSpecial Marine WarningMOB54 min
Aug 30, 10:55 AM CDTTornado WarningMOBMobile, Washington25 min
Aug 30, 11:47 AM CDTFlash Flood WarningMOBClarke, Washington5 hr
Aug 30, 11:57 AM CDTFlash Flood WarningMOBBaldwin, Clarke, Mobile, Washington5 hr
Aug 30, 12:03 PM CDTFlash Flood WarningMOBEscambia75 min
Aug 30, 12:23 PM CDTTornado Warning Tornado observedMOBBaldwin, Mobile21 min
Aug 30, 12:30 PM CDTTornado Warning Tornado observedMOBBaldwin, Clarke, Mobile, Washington45 min
Aug 30, 1:08 PM CDTTornado Warning Tornado observedMOBClarke52 min
Aug 30, 1:39 PM CDTTornado Warning Tornado observedMOBClarke, Wilcox39 min
Aug 30, 3:57 PM CDTSpecial Marine WarningMOB48 min
Aug 30, 4:11 PM CDTCoastal Flood WarningMOBBaldwin, Mobile14 hr
Aug 30, 4:18 PM CDTSpecial Marine WarningMOB87 min
Aug 30, 4:20 PM CDTSpecial Marine WarningMOB85 min
Aug 30, 5:05 PM CDTSpecial Weather StatementMOBCovington55 min
Aug 30, 5:29 PM CDTSpecial Marine WarningMOB91 min
Aug 30, 6:46 PM CDTSpecial Marine WarningMOB89 min

Nearby

Areal Flood Warnings in Alabama, 2021Areal Flood Warnings in Mississippi, 2021Every areal 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.