Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 40, NWS Mobile, AL

June 4, 2009Clarke County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 4, 2009, 3:16 PM CDT for Clarke County, Alabama. It was in force for 89 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
Jun 4, 2009, 3:16 PM CDT (20:16 UTC)
Expired
Jun 4, 2009, 4:45 PM CDT
In force
89 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Clarke County, AL

The radar

The Mobile radar (KMOB), 131 km from the middle of the area, began a volume at 20:17 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

Birmingham, AL (KBMX), launched 12:00Z, 8.3 hours before the alert went out and 184 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 2009-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 952 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, Birmingham, AL at 12:00Z on 2009-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
952 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
479 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-12 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 042016
FFWMOB
ALC025-042145-
/O.NEW.KMOB.FF.W.0040.090604T2016Z-090604T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
316 PM CDT THU JUN 4 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CLARKE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF GROVE HILL...

* UNTIL 445 PM CDT

* AT 312 PM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH      
  FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. OFFICIALS       
  REPORTED WATER WAS COVERING SEVERAL ROADWAYS ACROSS NORTHERN       
  PORTIONS OF THE COUNTY. ADDITIONAL HEAVY RAIN WILL CONTINUE TO     
  MOVE ACROSS THE COUNTY THROUGH 445 PM THIS AFTERNOON.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  THOMASVILLE...TALLAHATTA SPRINGS...SCYRENE...RURAL...ROUNDHILL...
  PEACOCK...OPINE...FULTON...DICKINSON AND CHILTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3196 8770 3165 8759 3159 8805 3159 8806
      3191 8806 3193 8805 3194 8806 3194 8802

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 7:53 AM CDTSpecial Marine WarningMOB52 min
Jun 4, 10:17 AM CDTMarine Weather StatementMOB4 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.