Alert archive / Alabama / Flash Flood Warnings in 2011

Flash Flood Warning 28, NWS Birmingham, AL

June 28, 2011Lamar County, Alabama

NWS Birmingham, AL issued this flash flood warning at Jun 28, 2011, 12:07 PM CDT for Lamar County, Alabama. It was in force for 2 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: Jun 28, 2011, 12:07 PM CDT (17:07 UTC)
Expired: Jun 28, 2011, 2:34 PM CDT
In force: 2 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

County Lamar County, AL

The radar

The Columbus AFB radar (KGWX), 22 km from the middle of the area, began a volume at 17:08 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, 5.1 hours before the alert went out and 143 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: 2747 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 769 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 34 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.

764 
WGUS54 KBMX 281707
FFWBMX
ALC075-282000-
/O.NEW.KBMX.FF.W.0028.110628T1707Z-110628T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1207 PM CDT TUE JUN 28 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 1206 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED SLOW     
  MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED    
  AREA. 2 TO 3 INCHES ARE POSSIBLE OVER THE NEXT HOUR IN THE WARNED  
  AREA.

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

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.

&&

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

LAT...LON 3395 8823 3395 8795 3359 8794 3358 8827

$$

27

1 follow-up statement

206 
WGUS74 KBMX 281934
FFSBMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
234 PM CDT TUE JUN 28 2011

ALC075-281949-
/O.CAN.KBMX.FF.W.0028.000000T0000Z-110628T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAMAR AL-
234 PM CDT TUE JUN 28 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR LAMAR COUNTY IS
CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3395 8823 3395 8795 3359 8794 3358 8827

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 7:50 AM CDT	Special Weather Statement	BMX	Cherokee, Etowah	40 min
Jun 28, 8:59 AM CDT	Special Weather Statement	BMX	Marion, Winston	61 min
Jun 28, 11:21 AM CDT	Areal Flood Advisory	BMX	Marion	3 hr
Jun 28, 11:41 AM CDT	Flash Flood Warning	BMX	Lamar, Marion	3 hr
Jun 28, 11:54 AM CDT	Special Weather Statement	BMX	Lamar	66 min
Jun 28, 12:04 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar	41 min
Jun 28, 12:22 PM CDT	Special Weather Statement	BMX	Elmore	38 min
Jun 28, 12:22 PM CDT	Severe Thunderstorm Warning	BMX	Pickens	53 min
Jun 28, 12:27 PM CDT	Special Weather Statement	BMX	Tuscaloosa	48 min
Jun 28, 12:53 PM CDT	Special Weather Statement	BMX	Greene, Sumter	52 min
Jun 28, 1:01 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Tuscaloosa	19 min
Jun 28, 1:05 PM CDT	Special Weather Statement	BMX	Bibb	40 min
Jun 28, 1:18 PM CDT	Special Weather Statement	BMX	Macon	42 min
Jun 28, 2:32 PM CDT	Special Weather Statement	BMX	Bullock	43 min
Jun 28, 2:52 PM CDT	Special Weather Statement	BMX	Marengo	38 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.