Alert archive / Alabama / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Birmingham, AL

December 23, 2014Lamar County, Alabama

NWS Birmingham, AL issued this flash flood warning at Dec 23, 2014, 6:41 PM CST for Lamar 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: Dec 23, 2014, 6:41 PM CST (00:41 UTC)
Expired: Dec 23, 2014, 9:30 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), 23 km from the middle of the area, began a volume at 00:44 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

Time	Report	Where	Remark
Dec 23, 6:46 PM CST	FLASH FLOOD	Vernon, AL	10-15 ROADS IMPASSABLE

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 00:00Z, 0.7 hours before the alert went out and 145 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: 18 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 505 m²/s²
0-3 km storm-relative helicity: 643 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

756 
WGUS54 KBMX 240041
FFWBMX
ALC075-240330-
/O.NEW.KBMX.FF.W.0013.141224T0041Z-141224T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
641 PM CST TUE DEC 23 2014

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

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

* UNTIL 930 PM CST

* AT 641 PM CST...NATIONAL WEATHER SERVICE INDICATED SLOW MOVING   
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS 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...KENNEDY AND LAMAR COUNTY AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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 OR TWEET YOUR REPORT USING HASHTAG ALWX

LAT...LON 3406 8821 3405 8799 3403 8799 3402 8795
      3352 8795 3353 8828

$$

75

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 23, 6:01 PM CST	Tornado Warning	BMX	Bibb, Chilton, Perry	23 min
Dec 23, 6:08 PM CST	Areal Flood Advisory	BMX	Fayette, Lamar, Marion, Pickens, Tuscaloosa, Walker and 1 more	3 hr
Dec 23, 6:16 PM CST	Areal Flood Advisory	BMX	Autauga, Chilton, Coosa, Dallas, Lowndes, Shelby and 1 more	59 min
Dec 23, 6:18 PM CST	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Dallas, Lowndes	57 min
Dec 23, 6:41 PM CST	Special Weather Statement	BMX	Clay, Coosa, Talladega, Tallapoosa	49 min
Dec 23, 6:44 PM CST	Flash Flood Warning	BMX	Jefferson	3 hr
Dec 23, 6:50 PM CST	Flash Flood Warning	BMX	Marion, Winston	3 hr
Dec 23, 6:55 PM CST	Special Weather Statement	BMX	Bullock, Elmore, Macon, Montgomery	65 min
Dec 23, 6:57 PM CST	Areal Flood Advisory	BMX	Bullock, Clay, Elmore, Montgomery, Talladega, Tallapoosa	63 min
Dec 23, 7:38 PM CST	Special Weather Statement	BMX	Chambers, Randolph, Tallapoosa	52 min
Dec 23, 7:58 PM CST	Special Weather Statement	BMX	Barbour, Bullock, Lee, Macon, Pike, Russell	62 min
Dec 23, 9:00 PM CST	Special Weather Statement	BMX	Barbour, Russell	60 min
Dec 23, 9:48 PM CST	Flash Flood Warning	BMX	Lamar	3 hr
Dec 24, 10:01 AM CST	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	58 hr

Nearby

Flash Flood Warnings in Alabama, 2014 Every flash flood warning in 2014

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.