Alert archive / Alabama / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 267, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Apr 28, 1997, 4:16 PM CDT for Blount County, Alabama. It was in force for 49 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 28, 1997, 4:16 PM CDT (21:16 UTC)
- Expired
- Apr 28, 1997, 5:05 PM CDT
- In force
- 49 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Blount County, AL
The radar
The Birmingham radar (KBMX), 92 km from the middle of the area, began a volume at 21:18 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 28, 4:45 PM CDT | Hail 0.75 | Oneonta, AL | Three-quarter inch hail was reported in Oneonta. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 28, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 9.3 hours before the alert went out and 91 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
- 263 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
433 WUUS1 KBHM 282118 RRA SVRBHM ALC009-282205- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 416 PM CDT MON APR 28 1997 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM AL HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 505 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHERN ALABAMA ...BLOUNT AT 415 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY WEATHER RADAR IN THE VICINITY OF ALLGOOD MOVING NORTHEAST AT 25 MPH. THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH... DESTRUCTIVE HAIL... DEADLY LIGHTNING... AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 1:10 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 30 min |
| Apr 28, 1:46 PM CDT | Severe Thunderstorm Warning | BMX | Talladega | 34 min |
| Apr 28, 2:10 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun | 60 min |
| Apr 28, 2:52 PM CDT | Severe Thunderstorm Warning | BMX | Etowah, St. Clair | 63 min |
| Apr 28, 3:53 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee | 62 min |
| Apr 28, 4:46 PM CDT | Severe Thunderstorm Warning | BMX | Etowah | 64 min |
| Apr 28, 4:49 PM CDT | Severe Thunderstorm Warning | BMX | Marshall | 56 min |
| Apr 28, 4:56 PM CDT | Severe Thunderstorm Warning | BMX | Cullman, Winston | 64 min |
| Apr 28, 5:02 PM CDT | Severe Thunderstorm Warning | BMX | DeKalb | 58 min |
| Apr 28, 5:13 PM CDT | Severe Thunderstorm Warning | BMX | Limestone, Madison | 62 min |
| Apr 28, 5:21 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 49 min |
| Apr 28, 5:40 PM CDT | Severe Thunderstorm Warning | BMX | Blount | 65 min |
| Apr 28, 5:51 PM CDT | Tornado Warning | BMX | DeKalb | 69 min |
| Apr 28, 6:08 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 32 min |
| Apr 28, 6:15 PM CDT | Flash Flood Warning | BMX | Etowah | 2 hr |
| Apr 28, 6:15 PM CDT | Severe Thunderstorm Warning | BMX | Marshall | 60 min |
| Apr 28, 6:27 PM CDT | Severe Thunderstorm Warning | BMX | Etowah | 48 min |
| Apr 28, 6:31 PM CDT | Tornado Warning | BMX | Marshall | 59 min |
| Apr 28, 6:44 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun | 66 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.