Alert archive / Alabama / Flash Flood Warnings in 2002

Flash Flood Warning 11, NWS Birmingham, AL

April 30, 2002Walker County, Alabama

NWS Birmingham, AL issued this flash flood warning at Apr 30, 2002, 5:53 PM CDT for Walker 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 counties it named.

The facts

Issued: Apr 30, 2002, 5:53 PM CDT (22:53 UTC)
Expired: Apr 30, 2002, 8:45 PM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Whole counties

County Walker County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.9 hours before the alert went out and 84 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1301 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 350 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBMX 302253
FFWBHM
ALC127-010145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
550 PM CDT TUE APR 30 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WALKER COUNTY IN ALABAMA

* UNTIL 845 PM CDT

* AT 550 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A BAND OF 
THUNDERSTORMS WITH HEAVY RAINFALL MOVING THROUGH EASTERN WALKER 
COUNTY.  PREVIOUS STRONG THUNDERSTORMS MOVED ACROSS MOST OF THE 
COUNTY EARLIER IN THE AFTERNOON...AND RADAR HAS ESTIMATED RAINFALL 
AMOUNTS OF THREE TO FOUR INCHES ACROSS THE NORTHERN HALF OF THE 
COUNTY...PARTICULARLY IN THE CARBON HILL TO JASPER AREAS.  THIS IS 
LIKELY RESULTING IN SOME FLOODING OF AREA ROADS...AND THE OVERFLOW 
OF SMALLER STREAMS AS WELL.  THESE HAZARDOUS CONDITIONS WILL LIKELY 
PERSIST THROUGH THE MID EVENING HOURS.      

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

1 follow-up statement

000 
WGUS74 KBMX 302355
FFSBHM
ALC127-010030-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
653 PM CDT TUE APR 30 2002

...FLASH FLOOD WARNING FOR WALKER COUNTY HAS BEEN CANCELLED...

AT 653 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT 
RAINFALL HAS DIMINISHED ACROSS WALKER COUNTY. THERE WILL STILL BE 
STANDING WATER ON AREA ROADS AND HIGH WATER IN DITCHES AND CREEKS OR 
STREAMS FOR NEXT FEW HOURS.  PLEASE BE CAREFUL WHEN TRAVELING ACROSS 
THE COUNTY THIS EVENING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 2:16 AM CDT	Severe Thunderstorm Warning	BMX	Marion	44 min
Apr 30, 9:04 AM CDT	Severe Thunderstorm Warning	BMX	Marion	56 min
Apr 30, 9:10 AM CDT	Severe Thunderstorm Warning	BMX	Franklin	35 min
Apr 30, 9:22 AM CDT	Severe Thunderstorm Warning	BMX	Cullman	23 min
Apr 30, 9:22 AM CDT	Severe Thunderstorm Warning	BMX	Blount	38 min
Apr 30, 9:30 AM CDT	Severe Thunderstorm Warning	BMX	Lawrence	60 min
Apr 30, 9:42 AM CDT	Severe Thunderstorm Warning	BMX	Etowah, St. Clair	63 min
Apr 30, 9:51 AM CDT	Severe Thunderstorm Warning	BMX	Cleburne	54 min
Apr 30, 10:04 AM CDT	Severe Thunderstorm Warning	BMX	Blount	56 min
Apr 30, 10:20 AM CDT	Severe Thunderstorm Warning	BMX	Morgan	40 min
Apr 30, 10:27 AM CDT	Severe Thunderstorm Warning	BMX	Walker	33 min
Apr 30, 10:30 AM CDT	Severe Thunderstorm Warning	BMX	Talladega	45 min
Apr 30, 10:38 AM CDT	Severe Thunderstorm Warning	BMX	Clay	52 min
Apr 30, 1:25 PM CDT	Severe Thunderstorm Warning	BMX	Blount, St. Clair	50 min
Apr 30, 1:34 PM CDT	Severe Thunderstorm Warning	BMX	Autauga	41 min
Apr 30, 1:38 PM CDT	Severe Thunderstorm Warning	BMX	Lamar	52 min
Apr 30, 2:04 PM CDT	Severe Thunderstorm Warning	BMX	Lowndes	26 min
Apr 30, 2:09 PM CDT	Severe Thunderstorm Warning	BMX	Fayette	66 min
Apr 30, 2:11 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	64 min
Apr 30, 2:23 PM CDT	Severe Thunderstorm Warning	BMX	Autauga	12 min
Apr 30, 2:34 PM CDT	Tornado Warning	BMX	Montgomery	26 min
Apr 30, 2:59 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	46 min
Apr 30, 3:01 PM CDT	Flash Flood Warning	BMX	Jefferson	3 hr
Apr 30, 3:22 PM CDT	Severe Thunderstorm Warning	BMX	Bullock	53 min
Apr 30, 3:36 PM CDT	Severe Thunderstorm Warning	BMX	Franklin	39 min
Apr 30, 4:15 PM CDT	Severe Thunderstorm Warning	BMX	Bullock	25 min
Apr 30, 4:22 PM CDT	Severe Thunderstorm Warning	BMX	Barbour	53 min
Apr 30, 4:28 PM CDT	Severe Thunderstorm Warning	BMX	Lamar	47 min
Apr 30, 4:32 PM CDT	Severe Thunderstorm Warning	BMX	Pickens	58 min
Apr 30, 4:35 PM CDT	Severe Thunderstorm Warning	BMX	Talladega	40 min
Apr 30, 4:51 PM CDT	Tornado Warning	BMX	Pickens	39 min
Apr 30, 4:59 PM CDT	Tornado Warning	BMX	Barbour	31 min
Apr 30, 5:11 PM CDT	Severe Thunderstorm Warning	BMX	Fayette	49 min
Apr 30, 5:16 PM CDT	Tornado Warning	BMX	Tuscaloosa	59 min
Apr 30, 5:39 PM CDT	Flash Flood Warning	BMX	Jefferson	3 hr
Apr 30, 5:42 PM CDT	Tornado Warning	BMX	Hale	48 min
Apr 30, 6:02 PM CDT	Tornado Warning	BMX	Bibb	58 min
Apr 30, 6:12 PM CDT	Tornado Warning	BMX	Perry	63 min
Apr 30, 6:19 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Lee, Shelby	56 min
Apr 30, 6:55 PM CDT	Severe Thunderstorm Warning	BMX	Chilton	50 min

Nearby

Flash Flood Warnings in Alabama, 2002 Every flash flood warning in 2002

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.