Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 27, NWS Birmingham, AL

August 2, 2012Marion County, Winston County, Alabama

NWS Birmingham, AL issued this flash flood warning at Aug 2, 2012, 4:42 PM CDT for Marion County, Winston County, Alabama. It was in force for 80 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 2, 2012, 4:42 PM CDT (21:42 UTC)
Expired: Aug 2, 2012, 6:02 PM CDT
In force: 80 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Marion County, AL, Winston County, AL

The radar

The Columbus AFB radar (KGWX), 62 km from the middle of the area, began a volume at 21:43 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, 9.7 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: 1483 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1379 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 19 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.

359 
WGUS54 KBMX 022142
FFWBMX
ALC093-133-030030-
/O.NEW.KBMX.FF.W.0027.120802T2142Z-120803T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
442 PM CDT THU AUG 2 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN MARION COUNTY IN NORTHWEST ALABAMA...
  SOUTHWESTERN WINSTON COUNTY IN NORTHWEST ALABAMA...

* UNTIL 730 PM CDT

* AT 439 PM CDT...EMERGENCY MANAGEMENT REPORTED SLOW MOVING   
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS SOUTHEASTERN MARION 
AND WESTERN WINSTON COUNTY. RADAR ESTIMATES OF UP TO 3 INCHES OF 
RAINFALL HAVE FALLEN OVER THE LAST HOUR...AN ANOTHER INCH OF RAIN 
WILL BE POSSIBLE OVER THE NEXT HOUR.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LYNN...WINFIELD...ASHBANK...BRILLIANT...GLEN ALLEN...GU-WIN...
  GUIN...LAKE BUTTAHATCHEE AND NAUVOO.

EMERGENCY MANAGEMENT HAS REPORTED THAT ROADWAYS HAVE BECOME 
IMPASSIBLE IN THE CITY OF BRILLIANT DUE TO FLOODING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. RAINFALL FROM PERSISTENT RAINBANDS
WILL PRODUCE FLOODING IN LOW LYING AREAS AND ALONG STREETS. MANY
ROADS WILL BE CLOSED DUE TO HIGH WATER AND DRIVING IS NOT RECOMMENDED
DURING THE NEXT SEVERAL HOURS.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758 OR TWEET YOUR REPORT USING HASHTAG ALWX

LAT...LON 3419 8742 3400 8744 3400 8764 3392 8764
      3391 8766 3392 8793 3392 8795 3408 8795
      3414 8781 3420 8759

$$

56

1 follow-up statement

448 
WGUS74 KBMX 022302
FFSBMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
602 PM CDT THU AUG 2 2012

ALC093-133-022317-
/O.CAN.KBMX.FF.W.0027.000000T0000Z-120803T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION AL-WINSTON AL-
602 PM CDT THU AUG 2 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHWESTERN
WINSTON AND SOUTHEASTERN MARION 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 3419 8742 3400 8744 3400 8764 3392 8764
      3391 8766 3392 8793 3392 8795 3408 8795
      3414 8781 3420 8759

$$

56

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 7:13 PM CDT	Special Weather Statement	BMX	Chambers	47 min
Aug 2, 8:47 AM CDT	Areal Flood Advisory	BMX	Greene, Hale, Marengo, Perry, Sumter	3 hr
Aug 2, 9:58 AM CDT	Flash Flood Warning	BMX	Sumter	3 hr
Aug 2, 11:06 AM CDT	Special Weather Statement	BMX	Lowndes	39 min
Aug 2, 12:58 PM CDT	Areal Flood Warning	BMX	Sumter	3 hr
Aug 2, 12:58 PM CDT	Special Weather Statement	BMX	Coosa	47 min
Aug 2, 2:14 PM CDT	Areal Flood Advisory	BMX	Bullock, Macon, Montgomery	3 hr
Aug 2, 3:19 PM CDT	Special Weather Statement	BMX	Russell	41 min
Aug 2, 3:26 PM CDT	Special Weather Statement	BMX	Marion	49 min
Aug 2, 3:31 PM CDT	Areal Flood Advisory	BMX	Marion, Winston	3 hr
Aug 2, 3:48 PM CDT	Severe Thunderstorm Warning	BMX	Marion	42 min
Aug 2, 4:30 PM CDT	Special Weather Statement	BMX	Lamar	45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.