Alert archive / Alabama / Flash Flood Warnings in 1998
Flash Flood Warning 44, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Apr 18, 1998, 7:26 PM CDT for DeKalb County, Alabama. It was in force for 4 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 18, 1998, 7:26 PM CDT (00:26 UTC)
- Expired
- Apr 18, 1998, 11:30 PM CDT
- In force
- 4 hr
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County DeKalb County, AL
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 0.4 hours before the alert went out and 168 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.
- Mixed-layer CAPE
- 782 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 612 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 229 m²/s²
- 0-3 km storm-relative helicity
- 393 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 13.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBHM 190026 FFWBHM ALC049-190430- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 726 PM CDT SAT APR 18 1998 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * FLASH FLOOD WARNING FOR... DEKALB COUNTY... IN NORTHERN ALABAMA * UNTIL 1130 PM CDT * AT 725 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS DEKALB COUNTY... MOVING NORTHEAST AT 35 MILES> AN HOUR. ADDITIONAL RAINFALL OF 2 OR MORE INCHES CAN BE EXPECTED ACROSS THE COUNTY IN THE NEXT FEW HOURS. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 18, 7:20 PM CDT, 6 minutes before
ALZ023-032-039-190125- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 720 PM CDT SAT APR 18 1998 THE TORNADO WATCH NUMBER 246 HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES... IN ALABAMA ...TUSCALOOSA... HALE... MARENGO
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 7:01 PM CDT | Tornado Warning | BMX | Marshall | 19 min |
| Apr 18, 7:02 PM CDT | Tornado Warning | BMX | Jefferson | 33 min |
| Apr 18, 7:13 PM CDT | Severe Thunderstorm Warning | BMX | Chilton | 62 min |
| Apr 18, 7:26 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair, Talladega | 64 min |
| Apr 18, 7:30 PM CDT | Tornado Warning | BMX | Lowndes | 50 min |
| Apr 18, 7:36 PM CDT | Tornado Warning | BMX | DeKalb | 44 min |
| Apr 18, 7:39 PM CDT | Tornado Warning | BMX | Chilton | 31 min |
| Apr 18, 7:44 PM CDT | Tornado Warning | BMX | Cherokee | 46 min |
| Apr 18, 7:55 PM CDT | Tornado Warning | BMX | Shelby | 20 min |
| Apr 18, 7:58 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun | 47 min |
| Apr 18, 8:23 PM CDT | Tornado Warning | BMX | Talladega | 62 min |
| Apr 18, 9:06 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee | 19 min |
Nearby
Flash Flood Warnings in Alabama, 1998Every flash flood warning in 1998
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.