Alert archive / Alabama / Flash Flood Warnings in 2004

Flash Flood Warning 49, NWS Birmingham, AL

November 24, 2004Shelby County, Alabama

NWS Birmingham, AL issued this flash flood warning at Nov 24, 2004, 6:20 AM CST for Shelby 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: Nov 24, 2004, 6:20 AM CST (12:20 UTC)
Expired: Nov 24, 2004, 8:30 AM CST
In force: 2 hr
Issued by: NWS Birmingham, AL
Area: Counties, with a storm outline in the text

County Shelby County, AL

The radar

The Birmingham radar (KBMX), 12 km from the middle of the area, began a volume at 12:22 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.3 hours before the alert went out and 206 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: 159 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBMX 241220
FFWBMX
ALC117-241430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
620 AM CST WED NOV 24 2004

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SHELBY COUNTY IN CENTRAL ALABAMA
  THIS INCLUDES THE CITIES OF...PELHAM...HELENA...COLUMBIANA...
  ALABASTER

* UNTIL 830 AM CST

* AT 620 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM NUMEROUS SHOWERS AND THUNDERSTORMS OVER SHELBY 
  COUNTY.  DOPPLER RADAR ESTIMATES THAT ONE TO TWO INCHES OF RAIN    
  HAS FALLEN OVER THE COUNTY SINCE 4 AM CST.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WILSONVILLE...VINCENT...VANDIVER...OAK MOUNTAIN STATE PARK...
  HARPERSVILLE AND CHELSEA.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN 
THE WARNED AREA.  THIS WILL ONLY AGGRAVATE THE FLOODING SITUATION.  
PONDING OF WATER IN DITCHES...LOW LYING AREAS...AND SMALL STREAMS 
ARE LIKELY ACROSS SHELBY COUNTY EARLY THIS MORNING.

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.

LAT...LON 3324 8695 3311 8688 3313 8653 3338 8641
      3348 8653

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 23, 7:21 PM CST	Severe Thunderstorm Warning	BMX	Lamar	54 min
Nov 23, 8:13 PM CST	Severe Thunderstorm Warning	BMX	Marion	62 min
Nov 23, 9:27 PM CST	Severe Thunderstorm Warning	BMX	Lamar, Marion	63 min
Nov 23, 9:48 PM CST	Tornado Warning	BMX	Lamar, Marion	42 min
Nov 23, 10:16 PM CST	Severe Thunderstorm Warning	BMX	Winston	59 min
Nov 24, 12:04 AM CST	Flash Flood Warning	BMX	Marion	116 min
Nov 24, 12:43 AM CST	Flash Flood Warning	BMX	Lamar	2 hr
Nov 24, 2:08 AM CST	Severe Thunderstorm Warning	BMX	Cherokee	22 min
Nov 24, 3:08 AM CST	Flash Flood Warning	BMX	Lamar, Marion	3 hr
Nov 24, 3:16 AM CST	Tornado Warning	BMX	Sumter	44 min
Nov 24, 3:19 AM CST	Tornado Warning	BMX	Pickens	56 min
Nov 24, 3:35 AM CST	Flash Flood Warning	BMX	Jefferson, Tuscaloosa	3 hr
Nov 24, 3:40 AM CST	Tornado Warning	BMX	Greene	35 min
Nov 24, 3:47 AM CST	Tornado Warning	BMX	Marengo	58 min
Nov 24, 3:51 AM CST	Flash Flood Warning	BMX	Cherokee, Etowah	3 hr
Nov 24, 4:31 AM CST	Tornado Warning	BMX	Dallas	44 min
Nov 24, 5:03 AM CST	Flash Flood Warning	BMX	St. Clair	3 hr
Nov 24, 5:14 AM CST	Tornado Warning	BMX	Dallas	31 min
Nov 24, 5:23 AM CST	Tornado Warning	BMX	Marengo	22 min
Nov 24, 5:37 AM CST	Tornado Warning	BMX	Autauga, Chilton, Dallas	38 min
Nov 24, 6:06 AM CST	Tornado Warning	BMX	Lowndes	24 min
Nov 24, 6:11 AM CST	Tornado Warning	BMX	Autauga	49 min
Nov 24, 6:19 AM CST	Tornado Warning	BMX	Chilton, Coosa	26 min
Nov 24, 6:33 AM CST	Flash Flood Warning	BMX	Jefferson	117 min
Nov 24, 6:41 AM CST	Tornado Warning	BMX	Elmore	49 min
Nov 24, 6:42 AM CST	Flash Flood Warning	BMX	Cherokee, Etowah	3 hr
Nov 24, 6:44 AM CST	Tornado Warning	BMX	Coosa	31 min
Nov 24, 6:52 AM CST	Flash Flood Warning	BMX	Blount	3 hr
Nov 24, 7:03 AM CST	Flash Flood Warning	BMX	Calhoun, Talladega	3 hr
Nov 24, 7:04 AM CST	Tornado Warning	BMX	Calhoun, Talladega	41 min
Nov 24, 7:05 AM CST	Tornado Warning	BMX	Clay	25 min
Nov 24, 7:06 AM CST	Severe Thunderstorm Warning	BMX	Tallapoosa	39 min
Nov 24, 7:30 AM CST	Severe Thunderstorm Warning	BMX	Macon, Tallapoosa	30 min
Nov 24, 7:54 AM CST	Severe Thunderstorm Warning	BMX	Lee	51 min
Nov 24, 8:10 AM CST	Tornado Warning	BMX	Chambers, Lee	35 min
Nov 24, 8:12 AM CST	Flash Flood Warning	BMX	Blount, Calhoun, Cherokee, Clay, Cleburne, Etowah and 4 more	4 hr
Nov 24, 11:55 AM CST	Flash Flood Warning	BMX	Blount, Calhoun, Cherokee, Clay, Cleburne, Etowah and 4 more	4 hr
Nov 24, 3:59 PM CST	Flash Flood Warning	BMX	Calhoun, Etowah, St. Clair	4 hr
Nov 24, 4:17 PM CST	Flash Flood Warning	BMX	St. Clair	4 hr

Nearby

Flash Flood Warnings in Alabama, 2004 Every flash flood warning in 2004

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.