Alert archive / Alabama / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 421, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Jul 24, 1999, 6:03 PM CDT for Coosa County, Alabama. It was in force for 32 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
- Jul 24, 1999, 6:03 PM CDT (23:03 UTC)
- Expired
- Jul 24, 1999, 6:35 PM CDT
- In force
- 32 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Coosa County, AL
The radar
The Birmingham radar (KBMX), 55 km from the middle of the area, began a volume at 23:02 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 |
|---|---|---|---|
| Jul 24, 6:15 PM CDT | Thunderstorm Wind 50 | Stewartsville, AL | Trees were knocked down in the city of Stewartville. |
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 nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 11.1 hours before the alert went out and 57 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
- 1186 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 885 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBHM 242302 RRA SVRBHM ALC037-242335- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 603 PM CDT SAT JUL 24 1999 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED...A * SEVERE THUNDERSTORM WARNING FOR... COOSA COUNTY...IN CENTRAL ALABAMA... * UNTIL 635 PM CDT. * AT 601 PM CDT... WEATHER RADAR SHOWED A SEVERE THUNDERSTORM...OVER NORTH CENTRAL SECTIONS NEAR HANOVER. THIS STORM WAS MOVING SOUTHEAST AT 10 TO 15 MPH. DAMAGING WINDS...AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING ...AND STAY AWAY FROM WINDOWS! WHEN THUNDERSTORMS ARE OCCURRING... PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 7:36 PM CDT | Severe Thunderstorm Warning | BMX | Barbour | 34 min |
| Jul 24, 12:42 AM CDT | Severe Thunderstorm Warning | BMX | Shelby | 33 min |
| Jul 24, 3:17 PM CDT | Severe Thunderstorm Warning | BMX | Randolph | 33 min |
| Jul 24, 4:01 PM CDT | Severe Thunderstorm Warning | BMX | Jefferson | 49 min |
| Jul 24, 5:30 PM CDT | Severe Thunderstorm Warning | BMX | Blount | 35 min |
| Jul 24, 5:56 PM CDT | Severe Thunderstorm Warning | BMX | Madison | 34 min |
| Jul 24, 6:12 PM CDT | Severe Thunderstorm Warning | BMX | Morgan | 48 min |
| Jul 24, 6:33 PM CDT | Severe Thunderstorm Warning | BMX | Coosa | 32 min |
| Jul 24, 6:47 PM CDT | Severe Thunderstorm Warning | BMX | Lawrence | 48 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1999Every severe thunderstorm warning in 1999
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.