Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 12, NWS Birmingham, AL

June 11, 20124 counties in Alabama

NWS Birmingham, AL issued this flash flood warning at Jun 11, 2012, 6:40 PM CDT for 4 counties in 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: Jun 11, 2012, 6:40 PM CDT (23:40 UTC)
Expired: Jun 11, 2012, 9:30 PM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Fayette County, AL, Lamar County, AL, Marion County, AL, Winston County, AL

What was reported inside it

Time	Report	Where	Remark
Jun 11, 7:20 PM CDT	FLASH FLOOD	Haleyville, AL	FLOODING ON HIGHWAY 195 IN FRONT OF WALMART WITH WATER 4 TO 6 INCHES DEEP AND STILL RISING. OTHER LOCAL ROADWAYS IN THE AREA FLOODED.

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, 11.7 hours before the alert went out and 127 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: 506 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 459 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -44 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.

975 
WGUS54 KBMX 112340
FFWBMX
ALC057-075-093-133-120230-
/O.NEW.KBMX.FF.W.0012.120611T2340Z-120612T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
640 PM CDT MON JUN 11 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FAYETTE COUNTY IN WEST CENTRAL ALABAMA...
  LAMAR COUNTY IN WEST CENTRAL ALABAMA...
  MARION COUNTY IN NORTHWEST ALABAMA...
  WESTERN WINSTON COUNTY IN NORTHWEST ALABAMA...

* UNTIL 930 PM CDT

* AT 638 PM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING       
  ASSOCIATED WITH SLOW MOVING THUNDERSTORMS AND VERY HEAVY RAINFALL  
  ACROSS THE WARNED AREA. 

* FLOODING REPORTS IN AND AROUND LAMAR COUNTY...INCLUDING            
  SULLIGENT...HIGHWAY 278...HIGHWAY 17...THESE AREAS ARE ALREADY     
  FLOODED AND NEED TO BE AVOIDED FOR THE NEXT COUPLE OF HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A VERY DANGEROUS AND LIFE THREATENING FLOODING SITUATION. YOU
SHOULD NOT ATTEMPT TO TRAVEL. STAY HOME UNLESS YOU ARE FORCED TO
EVACUATE TO HIGHER GROUND.

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 3399 8822 3431 8784 3430 8747 3400 8752
      3400 8764 3387 8764 3386 8757 3353 8766
      3354 8828

$$

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 7:48 AM CDT	Areal Flood Advisory	BMX	Bullock, Lowndes, Montgomery	3 hr
Jun 11, 10:50 AM CDT	Areal Flood Advisory	BMX	Bullock, Lowndes, Montgomery, Pike	115 min
Jun 11, 5:36 PM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	39 min
Jun 11, 6:09 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Winston	66 min
Jun 11, 6:12 PM CDT	Special Weather Statement	BMX	St. Clair	48 min
Jun 11, 6:45 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	45 min
Jun 11, 6:51 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Pickens, Tuscaloosa	39 min
Jun 11, 6:56 PM CDT	Special Weather Statement	BMX	Talladega	49 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.