Alert archive / Alabama / Flash Flood Warnings in 2011

Flash Flood Warning 41, NWS Birmingham, AL

August 8, 2011Autauga County, Elmore County, Alabama

NWS Birmingham, AL issued this flash flood warning at Aug 8, 2011, 8:13 PM CDT for Autauga County, Elmore County, Alabama. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 8, 2011, 8:13 PM CDT (01:13 UTC)
Expired: Aug 8, 2011, 9:01 PM CDT
In force: 48 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Autauga County, AL, Elmore County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.2 hours before the alert went out and 83 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: 3454 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1101 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 4 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.

559 
WGUS54 KBMX 090113
FFWBMX
ALC001-051-090400-
/O.NEW.KBMX.FF.W.0041.110809T0113Z-110809T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
813 PM CDT MON AUG 8 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  AUTAUGA COUNTY IN ALABAMA...
  CENTRAL ELMORE COUNTY IN EAST CENTRAL ALABAMA...

* UNTIL 1100 PM CDT

* AT 813 PM CDT...NATIONAL WEATHER SERVICE INDICATED SLOW MOVING     
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.   1 
  TO 2 INCHES OF RAIN HAS ALREADY FALLEN AND AN ADDITIONAL 1 TO 2    
  INCHES IS STILL POSSIBLE.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MILLBROOK...PRATTVILLE...WETUMPKA...BILLINGSLEY...BLUE RIDGE...
  BOOTH...COOSADA...DEATSVILLE...DEXTER...ELMORE...SANTUCK...TEN
  CEDAR ESTATES...VIDA JUNCTION AND WEOKA MILLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

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

LAT...LON 3244 8677 3257 8681 3268 8670 3270 8604
      3269 8604 3248 8604 3247 8622 3248 8622
      3250 8626 3247 8629 3249 8631 3247 8631
      3246 8633

$$

10/ARM

1 follow-up statement

834 
WGUS74 KBMX 090201
FFSBMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
901 PM CDT MON AUG 8 2011

ALC001-051-090216-
/O.CAN.KBMX.FF.W.0041.000000T0000Z-110809T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ELMORE AL-AUTAUGA AL-
901 PM CDT MON AUG 8 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR AUTAUGA AND CENTRAL
ELMORE COUNTIES 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 3244 8677 3257 8681 3268 8670 3270 8604
      3269 8604 3248 8604 3247 8622 3248 8622
      3250 8626 3247 8629 3249 8631 3247 8631
      3246 8633

$$

10/ARM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:39 PM CDT	Areal Flood Advisory	BMX	Autauga, Elmore	111 min
Aug 8, 7:48 PM CDT	Special Weather Statement	BMX	Lee	42 min
Aug 8, 8:25 PM CDT	Flash Flood Warning	BMX	Autauga, Elmore, Lowndes, Montgomery	90 min
Aug 9, 1:49 PM CDT	Special Weather Statement	BMX	Dallas	41 min
Aug 9, 2:24 PM CDT	Severe Thunderstorm Warning	BMX	Dallas, Lowndes	39 min
Aug 9, 2:48 PM CDT	Special Weather Statement	BMX	Montgomery	42 min
Aug 9, 3:27 PM CDT	Special Weather Statement	BMX	Marengo	48 min
Aug 9, 4:15 PM CDT	Special Weather Statement	BMX	Pike	45 min
Aug 9, 4:26 PM CDT	Special Weather Statement	BMX	Barbour	49 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.