Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 7, NWS Birmingham, AL

March 31, 2012Lowndes County, Montgomery County, Alabama

NWS Birmingham, AL issued this flash flood warning at Mar 31, 2012, 7:32 AM CDT for Lowndes County, Montgomery 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: Mar 31, 2012, 7:32 AM CDT (12:32 UTC)
Expired: Mar 31, 2012, 10:30 AM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Lowndes County, AL, Montgomery County, AL

What was reported inside it

Time	Report	Where	Remark
Mar 31, 8:15 AM CDT	FLASH FLOOD	10 Nw Lapine, AL	PORTION OF COUNTY ROAD 12 FLOODED DUE TO HEAVY RAINFALL IN THE AREA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 0.5 hours before the alert went out and 132 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1095 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 580 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

305 
WGUS54 KBMX 311232
FFWBMX
ALC085-101-311530-
/O.NEW.KBMX.FF.W.0007.120331T1232Z-120331T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
732 AM CDT SAT MAR 31 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL LOWNDES COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHERN MONTGOMERY COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 1030 AM CDT

* AT 731 AM CDT...NATIONAL WEATHER SERVICE INDICATED SLOW MOVING     
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.     
  RADAR INDICATES THAT 3 TO 4 INCHES OF RAIN HAS FALLEN OVER THE     
  PAST 3 HOURS...WITH RAINFALL CONTINUING TO DEVELOP TO THE WEST AND 
  TRAIN OVER THE SAME AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MEADVILLE...DAVENPORT...DUBLIN...NAFTEL...PINE LEVEL...PINTLALA...
  RAMER...SELLERS...SPRAGUE AND STRATA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3201 8631 3205 8631 3205 8639 3201 8640
      3202 8654 3220 8653 3218 8629 3208 8601
      3200 8601

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 4:27 AM CDT	Special Weather Statement	BMX	Lowndes	48 min
Mar 31, 5:18 AM CDT	Special Weather Statement	BMX	Montgomery	42 min
Mar 31, 5:27 AM CDT	Areal Flood Advisory	BMX	Lowndes, Montgomery	3 hr
Mar 31, 5:33 AM CDT	Special Weather Statement	BMX	Russell	42 min
Mar 31, 5:56 AM CDT	Dense Fog Advisory	BMX	Fayette, Lamar, Marion, Walker, Winston	3 hr
Mar 31, 6:11 AM CDT	Special Weather Statement	BMX	Bullock, Macon, Russell	49 min
Mar 31, 6:48 AM CDT	Areal Flood Advisory	BMX	Barbour, Bullock, Macon, Pike, Russell	117 min
Mar 31, 4:23 PM CDT	Special Weather Statement	BMX	Winston	37 min
Mar 31, 4:39 PM CDT	Severe Thunderstorm Warning	BMX	Winston	36 min
Mar 31, 4:48 PM CDT	Special Weather Statement	BMX	Walker	27 min
Mar 31, 5:08 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	52 min
Mar 31, 5:32 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	43 min
Mar 31, 5:38 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah	37 min
Mar 31, 5:46 PM CDT	Severe Thunderstorm Warning	BMX	Blount	44 min
Mar 31, 5:49 PM CDT	Special Weather Statement	BMX	Cherokee	26 min
Mar 31, 5:52 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Walker	38 min
Mar 31, 6:08 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Calhoun, Etowah, St. Clair	52 min
Mar 31, 6:11 PM CDT	Severe Thunderstorm Warning	BMX	Walker	49 min
Mar 31, 6:19 PM CDT	Severe Thunderstorm Warning	BMX	Winston	41 min
Mar 31, 6:35 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Walker	40 min
Mar 31, 6:37 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Cleburne, Randolph, St. Clair, Talladega	38 min
Mar 31, 6:57 PM CDT	Severe Thunderstorm Warning	BMX	Walker	33 min
Mar 31, 6:58 PM CDT	Severe Thunderstorm Warning	BMX	Winston	32 min

Nearby

Flash Flood Warnings in Alabama, 2012 Every 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.