Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 75, NWS Mobile, AL

December 15, 2009Choctaw County, Washington County, Alabama; Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at Dec 15, 2009, 9:54 AM CST for Choctaw County, Washington County, Alabama; Wayne County, Mississippi. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Dec 15, 2009, 9:54 AM CST (15:54 UTC)
Expired
Dec 15, 2009, 10:44 AM CST
In force
50 min
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), 115 km from the middle of the area, began a volume at 15:55 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, 3.9 hours before the alert went out and 170 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 2009-12-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 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 2009-12-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 square meters per square second.1939587897Sfc1 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
442 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KMOB 151554
FFWMOB
ALC023-129-MSC153-151745-
/O.NEW.KMOB.FF.W.0075.091215T1554Z-091215T1745Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
954 AM CST TUE DEC 15 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF WAYNESBORO...
  SOUTHWESTERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1145 AM CST

* AT 949 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE   
  DETECTED ON RADAR VERY HEAVY RAIN FROM A BAND OF THUNDERSTORMS 
  NEAR AQUILLA...OR 13 MILES EAST OF WAYNESBORO...MOVING EAST AT 
  20 MPH.

* THE THUNDERSTORM PRODUCING VERY HEAVY RAIN WILL BE NEAR...
  HEALING SPRINGS BY 1000 AM CST...
  SILAS...BOLINGER AND MILLRY BY 1005 AM CST...
  CULLOMBURG AND KOENTON BY 1010 AM CST...
  SILVER CROSS AND BLADON SPRINGS BY 1025 AM CST...
  SILVER CROSS BY 1030 AM CST...

ADDITIONAL RAINFALL OF 1 TO 2 INCHES IS POSSIBLE IN THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR 
VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS 
ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER 
CAN SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED 
ROADS...TURN AROUND...DONT DROWN.

LAT...LON 3184 8819 3156 8809 3150 8886 3175 8886

$$
1 follow-up statement
000 
WGUS74 KMOB 151644
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1044 AM CST TUE DEC 15 2009

ALC023-129-MSC153-151653-
/O.CAN.KMOB.FF.W.0075.000000T0000Z-091215T1745Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON AL-CHOCTAW AL-WAYNE MS-
1044 AM CST TUE DEC 15 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL WAYNE...
SOUTHWESTERN CHOCTAW AND NORTHWESTERN WASHINGTON COUNTIES...

CELLS GENERATING RAIN HAVE WEAKENED AND RAINFALL RATE HAS DECREASED 
RAPIDLY. 

LAT...LON 3184 8819 3156 8809 3150 8886 3175 8886

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 14, 6:42 PM CSTFlash Flood WarningMOBBaldwin3 hr
Dec 14, 6:49 PM CSTFlash Flood WarningMOBChoctaw, Clarke, Escambia, Monroe, Washington, Wilcox101 min
Dec 14, 6:59 PM CSTFlash Flood WarningMOBChoctaw, Clarke, Escambia, Monroe, Washington, Wilcox91 min
Dec 14, 7:04 PM CSTFlash Flood WarningMOBChoctaw, Clarke, Escambia, Monroe, Washington, Wilcox86 min
Dec 14, 7:09 PM CSTFlash Flood WarningMOBMobile3 hr
Dec 14, 7:16 PM CSTRiver Flood WarningMOBCovington, Escambia68 hr
Dec 14, 7:16 PM CSTRiver Flood WarningMOBBaldwin5 days
Dec 14, 7:16 PM CSTRiver Flood WarningMOBCovington, Crenshaw, Escambia22 hr
Dec 14, 7:29 PM CSTFlash Flood WarningMOBConecuh, Escambia3 hr
Dec 14, 7:43 PM CSTRiver Flood WarningMOBDallas, Monroe, Wilcox3 days
Dec 14, 7:51 PM CSTFlash Flood WarningMOBMobile3 hr
Dec 14, 7:58 PM CSTFlash Flood WarningMOBButler, Covington, Crenshaw3 hr
Dec 14, 8:22 PM CSTSevere Thunderstorm WarningMOBCovington, Escambia53 min
Dec 14, 8:36 PM CSTTornado WarningMOBCovington, Escambia39 min
Dec 14, 8:47 PM CSTAreal Flood AdvisoryMOBChoctaw, Clarke, Monroe, Washington, Wilcox118 min
Dec 14, 8:47 PM CSTRiver Flood WarningMOBMobile25 hr
Dec 14, 9:03 PM CSTSpecial Marine WarningMOB87 min
Dec 14, 9:03 PM CSTSevere Thunderstorm WarningMOBBaldwin27 min
Dec 14, 9:10 PM CSTTornado WarningMOBCovington24 min
Dec 14, 9:11 PM CSTAreal Flood AdvisoryMOBBaldwin3 hr
Dec 14, 9:14 PM CSTSevere Thunderstorm WarningMOBCovington31 min
Dec 14, 9:44 PM CSTFlash Flood WarningMOBBaldwin4 hr
Dec 14, 9:51 PM CSTSpecial Marine WarningMOB39 min
Dec 14, 9:57 PM CSTFlash Flood WarningMOBMobile4 hr
Dec 14, 10:12 PM CSTFlash Flood WarningMOBConecuh, Escambia3 hr
Dec 14, 11:01 PM CSTFlash Flood WarningMOBCovington3 hr
Dec 15, 1:18 AM CSTAreal Flood WarningMOBBaldwin, Butler, Clarke, Conecuh, Covington, Crenshaw and 4 more8 hr
Dec 15, 3:17 AM CSTRiver Flood WarningMOBEscambia31 hr
Dec 15, 3:20 AM CSTSmall Craft AdvisoryMOB5 days
Dec 15, 8:42 AM CSTRiver Flood WarningMOBBaldwin14 hr
Dec 15, 8:58 AM CSTRiver Flood WarningMOBCovington4 days
Dec 15, 9:22 AM CSTAreal Flood WarningMOBBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more8 hr
Dec 15, 5:57 AM CSTFlash Flood WarningMOBGeorge, Greene, Perry, Stone6 hr

Nearby

Flash Flood Warnings in Alabama, 2009Flash Flood Warnings in Mississippi, 2009Every flash flood warning in 2009

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.