Alert archive / Alabama / Flash Flood Warnings in 2020

Flash Flood Warning 22, NWS Mobile, AL

August 25, 2020Choctaw County, Washington County, Alabama; Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at Aug 25, 2020, 8:12 AM CDT for Choctaw County, Washington County, Alabama; Wayne County, Mississippi. It was in force for 6 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
Aug 25, 2020, 8:12 AM CDT (13:12 UTC)
Expired
Aug 25, 2020, 2:15 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Choctaw County, AL, Washington County, AL, Wayne County, MS

The radar

The Mobile radar (KMOB), 127 km from the middle of the area, began a volume at 13:15 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

Jackson, MS (KJAN), launched 12:00Z, 1.2 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2020-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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, Jackson, MS at 12:00Z on 2020-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
22 J/kg
Mixed-layer CIN
-188 J/kg
Mixed-layer LCL
739 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

434 
WGUS54 KMOB 251312
FFWMOB
ALC023-129-MSC153-251915-
/O.NEW.KMOB.FF.W.0022.200825T1312Z-200825T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
812 AM CDT Tue Aug 25 2020

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southwestern Choctaw County in southwestern Alabama...
  Northwestern Washington County in southwestern Alabama...
  Wayne County in southeastern Mississippi...

* Until 215 PM CDT Tuesday.

* At 811 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 5 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...
  Waynesboro, Clara, Buckatunna, Silas, Gilbertown, Toxey, Denham, 
  Gretna, Boice, Winchester, Woodwards, West King, Isney, Contwell, 
  Chicora, Emory, Hiwannee, Aquilla, Belmont and Mehaffey.

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.

&&

LAT...LON 3201 8846 3186 8814 3182 8818 3180 8817
      3147 8849 3149 8891 3182 8894 3184 8871
      3189 8848

FLASH FLOOD...RADAR INDICATED

$$
1 follow-up statement
478 
WGUS74 KMOB 251543
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
1043 AM CDT Tue Aug 25 2020

ALC023-129-MSC153-251915-
/O.CON.KMOB.FF.W.0022.000000T0000Z-200825T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Choctaw AL-Washington AL-Wayne MS-
1043 AM CDT Tue Aug 25 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM CDT THIS 
AFTERNOON FOR SOUTHWESTERN CHOCTAW, NORTHWESTERN WASHINGTON AND 
WAYNE COUNTIES...

At 1036 AM CDT, Doppler radar indicated scattered showers and 
isolated thunderstorms producing locally heavy rainfall across the 
warned area. Between 3 and 6 inches of rain with isolated totals 
around 7 inches have fallen since early this morning. Additional 
heavy rainfall remains possible and excessive runoff will likely 
result in flash flooding of roads, creeks, streams, and other low 
lying areas.

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...
Waynesboro, Clara, Buckatunna, Silas, Gilbertown, Toxey, Denham, 
Gretna, Boice, Winchester, Woodwards, West King, Isney, Contwell, 
Chicora, Emory, Hiwannee, Aquilla, Belmont and Mehaffey.

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.

&&

LAT...LON 3201 8846 3186 8814 3182 8818 3180 8817
      3147 8849 3149 8891 3182 8894 3184 8871
      3189 8848

FLASH FLOOD...RADAR INDICATED

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 8:23 PM CDTSpecial Marine WarningMOB97 min
Aug 24, 9:59 PM CDTSpecial Marine WarningMOB46 min
Aug 24, 10:21 PM CDTSpecial Marine WarningMOB47 min
Aug 25, 12:20 AM CDTSpecial Weather StatementMOBCovington25 min
Aug 25, 12:35 AM CDTSpecial Weather StatementMOBCovington25 min
Aug 25, 6:00 AM CDTSpecial Weather StatementMOBBaldwin45 min
Aug 25, 6:48 AM CDTSpecial Marine WarningMOB57 min
Aug 25, 6:48 AM CDTSpecial Weather StatementMOBMobile42 min
Aug 25, 7:04 AM CDTAreal Flood AdvisoryMOBChoctaw, Clarke, Wilcox3 hr
Aug 25, 7:11 AM CDTSpecial Marine WarningMOB64 min
Aug 25, 7:59 AM CDTSpecial Weather StatementMOBBaldwin46 min
Aug 25, 8:49 AM CDTSpecial Weather StatementMOBBaldwin41 min
Aug 25, 12:16 PM CDTSpecial Marine WarningMOB59 min
Aug 25, 12:34 PM CDTSpecial Marine WarningMOB56 min
Aug 25, 1:14 PM CDTSpecial Marine WarningMOB61 min
Aug 25, 1:16 PM CDTSpecial Weather StatementMOBMobile59 min
Aug 25, 1:21 PM CDTSpecial Marine WarningMOB39 min
Aug 25, 2:01 PM CDTSpecial Marine WarningMOB44 min
Aug 25, 2:07 PM CDTSpecial Marine WarningMOB53 min
Aug 25, 2:25 PM CDTSpecial Weather StatementMOBMobile35 min
Aug 25, 2:29 PM CDTSpecial Weather StatementMOBBaldwin46 min
Aug 25, 3:07 PM CDTSpecial Marine WarningMOB38 min
Aug 25, 3:18 PM CDTSpecial Weather StatementMOBBaldwin27 min
Aug 25, 3:23 PM CDTSpecial Marine WarningMOB22 min
Aug 25, 3:38 PM CDTSpecial Weather StatementMOBMobile37 min
Aug 25, 7:33 AM CDTAreal Flood AdvisoryMOBWayne3 hr
Aug 25, 8:41 AM CDTSpecial Weather StatementMOBWayne49 min
Aug 25, 11:04 AM CDTSpecial Weather StatementMOBGreene26 min
Aug 25, 3:49 PM CDTSpecial Weather StatementMOBGeorge26 min
Aug 25, 4:12 PM CDTSpecial Weather StatementMOBGreene33 min
Aug 25, 4:14 PM CDTSpecial Weather StatementMOBWayne31 min
Aug 25, 4:20 PM CDTSpecial Weather StatementMOBPerry25 min
Aug 25, 4:33 PM CDTSpecial Weather StatementMOBGreene27 min

Nearby

Flash Flood Warnings in Alabama, 2020Flash Flood Warnings in Mississippi, 2020Every flash flood warning in 2020

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.