Alert archive / Alabama / Flash Flood Warnings in 2011

Flash Flood Warning 67, NWS Birmingham, AL

December 22, 2011Lamar County, Alabama

NWS Birmingham, AL issued this flash flood warning at Dec 22, 2011, 10:13 AM CST for Lamar County, Alabama. It was in force for 3 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: Dec 22, 2011, 10:13 AM CST (16:13 UTC)
Expired: Dec 22, 2011, 1:00 PM CST
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

County Lamar County, AL

The radar

The Columbus AFB radar (KGWX), 21 km from the middle of the area, began a volume at 16:14 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, 4.2 hours before the alert went out and 146 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 699 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 129 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.

859 
WGUS54 KBMX 221613
FFWBMX
ALC075-221900-
/O.NEW.KBMX.FF.W.0067.111222T1613Z-111222T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1013 AM CST THU DEC 22 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LAMAR COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 100 PM CST

* AT 1011 AM CST...NATIONAL WEATHER SERVICE RADAR AS WELL AS         
  EMERGENCY MANAGEMENT REPORTED SLOW MOVING THUNDERSTORMS WITH VERY  
  HEAVY RAINFALL ACROSS THE WARNED AREA. LOCALLY RAINFALL HAS        
  EXCEEDED ONE INCH WITH ANOTHER AREA OF RAIN EXPECTED TO MOVE INTO  
  THE AREA. LOCALIZED FLOODING MAY IMPACT PORTIONS OF THE WARNED     
  AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MILLPORT...SULLIGENT...VERNON...BEAVERTON...BEDFORD...BLOOMING
  GROVE...CREWS...DETROIT AND LAMAR COUNTY AIRPORT.

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 3405 8822 3406 8821 3405 8799 3403 8799
      3402 8795 3379 8795 3353 8807 3353 8828

$$

1 follow-up statement

818 
WGUS74 KBMX 221730
FFSBMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1130 AM CST THU DEC 22 2011

ALC075-221900-
/O.CON.KBMX.FF.W.0067.000000T0000Z-111222T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAMAR AL-
1130 AM CST THU DEC 22 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR LAMAR COUNTY UNTIL 100
PM CST...

AT 1127 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH PERIODIC HEAVY RAINFALL MOVING NORTHWARD INTO THE 
WARNED AREA. AN ADDITIONAL INCH OF RAIN IS POSSIBLE ACROSS THE AREA 
OVER THE NEXT TWO HOURS. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
MILLPORT...SULLIGENT...VERNON...BEAVERTON...BEDFORD...BLOOMING
GROVE...CREWS...DETROIT AND LAMAR COUNTY AIRPORT.

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.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN BIRMINGHAM.

&&

LAT...LON 3405 8822 3406 8821 3405 8799 3403 8799
      3402 8795 3379 8795 3353 8807 3353 8828

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 22, 8:49 AM CST	Flash Flood Watch	BMX	Fayette, Lamar, Marion, Pickens, Walker, Winston	7 hr
Dec 22, 9:52 AM CST	Special Weather Statement	BMX	Fayette	23 min
Dec 22, 11:47 AM CST	Tornado Warning	BMX	Greene, Hale, Tuscaloosa	25 min
Dec 22, 11:51 AM CST	Tornado Warning	BMX	Greene, Hale, Marengo, Perry	15 min
Dec 22, 12:53 PM CST	Tornado Warning	BMX	Bibb, Chilton, Shelby	52 min
Dec 22, 12:59 PM CST	Tornado Warning	BMX	Bibb, Chilton, Perry, Shelby	31 min
Dec 22, 1:08 PM CST	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	19 hr
Dec 22, 1:42 PM CST	Severe Thunderstorm Warning	BMX	Shelby, Talladega	33 min
Dec 22, 1:54 PM CST	Tornado Warning	BMX	St. Clair, Shelby, Talladega	39 min
Dec 22, 1:59 PM CST	Tornado Warning	BMX	Autauga, Coosa, Elmore, Tallapoosa	46 min
Dec 22, 2:39 PM CST	Tornado Warning	BMX	Clay, Coosa, Tallapoosa	15 min
Dec 22, 3:09 PM CST	Areal Flood Advisory	BMX	Etowah	111 min
Dec 22, 3:34 PM CST	Special Weather Statement	BMX	Pike	41 min

Nearby

Flash Flood Warnings in Alabama, 2011 Every flash flood warning in 2011

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.