Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 68, NWS Mobile, AL

December 14, 2009Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Dec 14, 2009, 7:51 PM CST for Mobile County, Alabama. It was in force for 3 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
Dec 14, 2009, 7:51 PM CST (01:51 UTC)
Expired
Dec 14, 2009, 10:45 PM CST
In force
3 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Mobile County, AL

The radar

The Mobile radar (KMOB), 26 km from the middle of the area, began a volume at 01:54 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
Dec 14, 9:10 PM CSTFLASH FLOOD2 Nw Mobile Airport, ALWATER COVERS A PORTION OF TANNER WILLIAMS ROAD JUST EAST OF SNOW ROAD.

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 00:00Z, 1.9 hours before the alert went out and 146 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 00:00Z on 2009-12-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1935 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2009-12-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 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
1935 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
452 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
1.5
Supercell composite
7.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KMOB 150151
FFWMOB
ALC097-150445-
/O.NEW.KMOB.FF.W.0068.091215T0151Z-091215T0445Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
751 PM CST MON DEC 14 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF DOWNTOWN MOBILE...

* UNTIL 1045 PM CST

* AT 748 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED VERY
  HEAVY RAIN AND THUNDERSTORMS MOVING INTO SOUTHERN MOBILE           
  COUNTY INCLUDING THE CITY OF MOBILE. THIS HEAVY RAINFALL WILL BE   
  CAPABLE OF PRODUCING RAINFALL TOTALS OF 2 TO 4 INCHES OVER THE     
  NEXT 3 HOURS. CONSIDERING MUCH OF SOUTHERN MOBILE COUNTY JUST      
  EXPERIENCED 4 TO 8 INCHES OF RAIN JUST A FEW DAYS AGO...THIS       
  ADDITIONAL HEAVY RAINFALL WILL LIKELY RESULT IN ADDITIONAL         
  FLOODING. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WALLACE
  TUNNEL...UNIVERSITY OF SOUTH ALABAMA...SPRING HILL COLLEGE...SNOW
  AND TANNER WILLIAMS...SEVEN HILLS...PINTO ISLAND...MOBILE
  INFIRMARY...MOBILE AIRPORT...LANGAN PARK...LADD STADIUM...KNOLLWOOD
  HOSPITAL...I65 AND MOFFETT ROAD...I65 AND AIRPORT BLVD...I10 AND
  I65 INTERSECTION...HUTCHENS ELEMENTARY SCHOOL...FOREST HILL...
  DAWES...CRICHTON...MEDAL OF HONOR PARK...BROOKLEY FIELD AIRPORT...
  BIG CREEK LAKE DAM...AIRPORT AND UNIVERSITY AND AIRPORT AND
  GOVERNMENT

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 IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE IN MOBILE AT
AREA CODE 2 5 1...AND THEN 6 3 3 6 4 4 3. OR...YOU MAY CONTACT YOUR
NEAREST LAW ENFORCEMENT AGENCY OR COUNTY EMERGENCY MANAGEMENT...AND
THEY WILL RELAY YOUR REPORT.

LAT...LON 3034 8820 3036 8820 3038 8825 3036 8825
      3035 8825 3036 8827 3038 8826 3037 8830
      3039 8832 3039 8840 3071 8842 3073 8801
      3071 8800 3058 8808 3052 8807 3052 8809
      3044 8810 3033 8814

$$

JFB

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, 7:58 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, 9:54 AM CSTFlash Flood WarningMOBChoctaw, Washington50 min

Nearby

Flash Flood Warnings in Alabama, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.