Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 10, NWS Mobile, AL

March 22, 2012George County, Greene County, Mississippi; Clarke County, Mobile County, Washington County, Alabama

NWS Mobile, AL issued this flash flood warning at Mar 22, 2012, 1:36 PM CDT for George County, Greene County, Mississippi; Clarke County, Mobile County, Washington County, Alabama. It was in force for 6 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
Mar 22, 2012, 1:36 PM CDT (18:36 UTC)
Expired
Mar 22, 2012, 7:30 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

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

The radar

The Mobile radar (KMOB), 51 km from the middle of the area, began a volume at 18:38 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
Mar 22, 3:00 PM CDTFLASH FLOODMcintosh, ALSEVERAL ROADS 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, 6.6 hours before the alert went out and 171 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 2012-03-22Temperature 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, Slidell Radar S, LA at 12:00Z on 2012-03-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
438 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
377 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

970 
WGUS54 KMOB 221836
FFWMOB
ALC025-097-129-MSC039-041-230030-
/O.NEW.KMOB.FF.W.0010.120322T1836Z-120323T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
136 PM CDT THU MAR 22 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHEASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTH CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...  
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  SOUTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 730 PM CDT

* AT 129 PM CDT...VERY HEAVY RAIN THAT HAS FALLEN FROM THUNDERSTORMS
  DURING THE PAST THREE HOURS. SOME 3 TO 4 INCHES OF RAIN HAS FALLEN
  DURING THE PAST THREE HOURS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SIMS
  CHAPEL...MOWA CHOCTAW RESERVATION...CALVERT...WAGARVILLE...VINEGAR
  BEND...TIBBIE...MCINTOSH...MALCOLM...LEROY...FAIRFORD AND DEER PARK

  AN ADDITIONAL TWO TO THREE INCHES OF RAIN MAY FALL OVER THE WARNED
  AREA THIS AFTERNOON AND EARLY EVENING AS A SECOND LINE OF
  THUNDERSTORMS SLOWLY APPROACHES FROM THE WEST AND INDIVIDUAL STORMS
  REPEATEDLY MOVE OVER THE SAME AREA. 

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3097 8855 3111 8849 3137 8831 3156 8786
      3134 8786 3118 8794 3094 8811 3084 8852

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 21, 10:11 PM CDTRiver Flood WarningMOBGeorge, Greene, Perry9 days
Mar 22, 2:02 AM CDTFlash Flood WarningMOBStone3 hr
Mar 22, 2:04 AM CDTTornado WarningMOBPerry23 min
Mar 22, 3:31 AM CDTFlash Flood WarningMOBPerry3 hr
Mar 22, 9:41 AM CDTFlash Flood WarningMOBGeorge, Greene, Perry, Stone, Wayne6 hr
Mar 22, 9:58 AM CDTRiver Flood WarningMOBGeorge, Greene, Jackson9 days
Mar 22, 10:00 AM CDTRiver Flood WarningMOBGeorge, Greene, Wayne9 days
Mar 22, 4:01 PM CDTAreal Flood WarningMOBGreene, Wayne12 hr
Mar 22, 8:50 AM CDTSevere Thunderstorm WarningMOBWashington55 min
Mar 22, 10:26 AM CDTSpecial Marine WarningMOB49 min
Mar 22, 11:00 AM CDTSevere Thunderstorm WarningMOBChoctaw45 min
Mar 22, 11:13 AM CDTSpecial Marine WarningMOB2 hr
Mar 22, 11:38 AM CDTSevere Thunderstorm WarningMOBClarke, Washington67 min
Mar 22, 1:05 PM CDTSpecial Marine WarningMOB115 min
Mar 22, 2:53 PM CDTAreal Flood AdvisoryMOBMobile3 hr
Mar 22, 3:17 PM CDTSpecial Marine WarningMOB43 min
Mar 22, 3:45 PM CDTFlash Flood WarningMOBBaldwin, Clarke, Escambia, Mobile, Monroe, Washington6 hr
Mar 22, 4:25 PM CDTSevere Thunderstorm WarningMOBWilcox50 min
Mar 22, 5:43 PM CDTSpecial Marine WarningMOB62 min
Mar 22, 6:46 PM CDTSpecial Marine WarningMOB89 min
Mar 22, 6:51 PM CDTSevere Thunderstorm WarningMOBBaldwin, Conecuh, Escambia, Monroe54 min

Nearby

Flash Flood Warnings in Alabama, 2012Flash Flood Warnings in Mississippi, 2012Every flash flood warning in 2012

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.