Alert archive / Alabama / Areal Flood Warnings in 2012

Areal Flood Warning 13, NWS Mobile, AL

September 4, 2012Conecuh County, Monroe County, Alabama

NWS Mobile, AL issued this areal flood warning at Sep 4, 2012, 4:26 PM CDT for Conecuh County, Monroe County, Alabama. It was in force for 8 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
Sep 4, 2012, 4:26 PM CDT (21:26 UTC)
Expired
Sep 5, 2012, 12:00 AM CDT
In force
8 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Conecuh County, AL, Monroe County, AL

The radar

The Mobile radar (KMOB), 127 km from the middle of the area, began a volume at 21:28 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, 9.4 hours before the alert went out and 188 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 2012-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1659 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, Birmingham, AL at 12:00Z on 2012-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939Sfc1 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
1659 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
531 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
26 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.

342 
WGUS44 KMOB 042126
FLWMOB

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
426 PM CDT TUE SEP 4 2012

ALC035-099-050915-
/O.NEW.KMOB.FA.W.0013.120904T2126Z-120905T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CONECUH AL-MONROE AL-
426 PM CDT TUE SEP 4 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLOOD WARNING FOR...
  WESTERN CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  CENTRAL MONROE COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 415 AM CDT WEDNESDAY

* AT 418 PM CDT...A LONG DURATION OF RAINFALL WAS INDICATED OVER
  THE WARNED AREA. RADAR ESTIMATES A WIDESPREAD RAINFALL OF TWO
  INCHES SINCE 1 PM CDT OVER MOST OF THE WARNED AREA....WITH
  ISOLATED HIGHER TOTALS AS HIGH AS 3 INCHES. AN ADDITIONAL 2 TO 3
  INCHES OF RAINFALL IS POSSIBLE AND A FLASH FLOOD WATCH REMAINS IN
  EFFECT. 

  THIS FLOOD EVENT WILL TRANSITION INTO A GENERAL INUNDATION AND
  WILL CAUSE FLOODING OF LOW LYING AND POOR DRAINAGE AREAS. ALL
  INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS IMMEDIATELY.

* LOCATIONS IMPACTED INCLUDE...
  PETERMAN...           MONROEVILLE...        MEGARGEL...
  FRISCO CITY...        EXCEL...              BEATRICE...
  REPTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GENERAL INUNDATION FLOODING IS EXPECTED AS SMALLER CREEKS OVERFLOW
WHILE TRYING TO DISCHARGE INTO AREA RIVERS. SLOW STEADY RISES IN
WATER CAN BE EXPECTED ALONG SMALL CREEKS AND RIVERS.

&&

LAT...LON 3179 8713 3142 8709 3129 8725 3145 8757
      3148 8757 3150 8760 3154 8759 3156 8757
      3159 8757 3165 8754 3182 8738

$$
1 follow-up statement
784 
WGUS84 KMOB 050500
FLSMOB

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1200 AM CDT WED SEP 5 2012

ALC035-099-050510-
/O.CAN.KMOB.FA.W.0013.000000T0000Z-120905T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CONECUH AL-MONROE AL-
1200 AM CDT WED SEP 5 2012

...THE FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL MONROE AND WEST
CENTRAL CONECUH COUNTIES...

AT 1159 PM CDT...THE HEAVY RAINFALL THAT PROMPTED THE WARNING FOR
CENTRAL MONROE AND WEST CENTRAL CONECUH COUNTIES HAS ENDED...THUS THE
FLOOD WARNING HAS BEEN CANCELLED. HOWEVER...PONDING OF WATER MAY
STILL BE ENCOUNTERED.

LAT...LON 3179 8713 3142 8709 3129 8725 3145 8757
      3148 8757 3150 8760 3154 8759 3156 8757
      3159 8757 3165 8754 3182 8738

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 6:52 AM CDTAreal Flood AdvisoryMOBButler, Crenshaw3 hr
Sep 4, 7:20 AM CDTAreal Flood AdvisoryMOBCovington3 hr
Sep 4, 7:30 AM CDTFlash Flood WarningMOBButler, Crenshaw6 hr
Sep 4, 8:12 AM CDTFlash Flood WatchMOBButler, Clarke, Conecuh, Covington, Crenshaw, Escambia and 2 more25 hr
Sep 4, 8:26 AM CDTFlash Flood WarningMOBButler, Covington, Crenshaw6 hr
Sep 4, 9:10 AM CDTFlash Flood WarningMOBWilcox6 hr
Sep 4, 10:13 AM CDTAreal Flood AdvisoryMOBClarke, Conecuh, Monroe3 hr
Sep 4, 11:40 AM CDTFlash Flood WarningMOBButler, Conecuh, Monroe3 hr
Sep 4, 1:33 PM CDTAreal Flood WarningMOBButler, Crenshaw3 hr
Sep 4, 2:14 PM CDTAreal Flood WarningMOBButler, Conecuh, Covington, Crenshaw, Monroe, Wilcox2 hr
Sep 4, 3:34 PM CDTFlash Flood WarningMOBBaldwin, Clarke, Conecuh, Escambia, Monroe6 hr
Sep 4, 3:44 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia61 min
Sep 4, 4:44 PM CDTSevere Thunderstorm WarningMOBBaldwin61 min
Sep 4, 4:59 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia61 min
Sep 4, 5:51 PM CDTSevere Thunderstorm WarningMOBBaldwin54 min
Sep 4, 5:56 PM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke, Monroe, Washington, Wilcox64 min
Sep 4, 6:37 PM CDTSevere Thunderstorm WarningMOBBaldwin30 min
Sep 4, 6:49 PM CDTSevere Thunderstorm WarningMOBBaldwin, Choctaw, Clarke, Escambia, Mobile, Monroe and 2 more34 min

Nearby

Areal Flood Warnings in Alabama, 2012Every areal 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.