Alert archive / Alabama / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 21, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Mar 12, 1986, 6:55 PM CST for Cullman County, Alabama. It was in force for 65 min. 2 reports 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
- Mar 12, 1986, 6:55 PM CST (00:55 UTC)
- Expired
- Mar 12, 1986, 8:00 PM CST
- In force
- 65 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Cullman County, AL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 12, 7:00 PM CST | Hail 0.75 | Cullman, AL | |
| Mar 12, 7:32 PM CST | Thunderstorm Wind 56 | Cullman, AL |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Centreville/Bibb, AL (KCKL), launched 00:00Z, 0.9 hours before the alert went out and 140 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
- 107 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 358 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBHM 130054 SVRBHM ALC073-043-130200- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 655 PM CST WED MAR 12 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 8:00 PM CST FOR PEOPLE IN THE FOLLOWING COUNTIES IN NORTH-CENTRAL ALABAMA... ...JEFFERSON AND CULLMAN... A LINE OF INTENSE THUNDERSTORMS WAS APPROACHING THE WEST EDGE OF BOTH CULLMAN AND JEFFERSON COUNTIES AT 6:55 PM. THE SEVERE THUNDERSTORMS WERE MOVING RAPIDLY NORTHEAST. IT MAY BE NECESSARY TO INCLUDE SOME OTHER COUNTIES LATER. A SEVERE THUNDERSTORM WARNING...ISSUED EARLIER...REMAINS IN EFFECT UNTIL 7:30 FOR WALKER...TUSCALOOSA AND GREENE CeOUNTIES.
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 6:27 PM CST | Severe Thunderstorm Warning | BMX | Tuscaloosa, Walker | 63 min |
| Mar 12, 6:27 PM CST | Severe Thunderstorm Warning | BMX | Greene | 63 min |
| Mar 12, 6:55 PM CST | Severe Thunderstorm Warning | BMX | Jefferson | 65 min |
| Mar 12, 7:03 PM CST | Severe Thunderstorm Warning | BMX | Hale, Marengo | 57 min |
| Mar 12, 7:33 PM CST | Severe Thunderstorm Warning | BMX | Morgan | 57 min |
| Mar 12, 7:40 PM CST | Tornado Warning | BMX | Cullman | 50 min |
| Mar 12, 7:56 PM CST | Severe Thunderstorm Warning | BMX | Madison | 64 min |
| Mar 12, 7:57 PM CST | Tornado Warning | BMX | Blount | 63 min |
| Mar 12, 8:08 PM CST | Severe Thunderstorm Warning | BMX | Perry | 52 min |
| Mar 12, 8:51 PM CST | Severe Thunderstorm Warning | BMX | Jackson, Marshall | 54 min |
| Mar 12, 9:11 PM CST | Severe Thunderstorm Warning | BMX | Greene, Tuscaloosa | 64 min |
| Mar 12, 9:27 PM CST | Severe Thunderstorm Warning | BMX | Pickens | 48 min |
| Mar 12, 9:52 PM CST | Severe Thunderstorm Warning | BMX | Jefferson | 38 min |
| Mar 13, 12:45 AM CST | Severe Thunderstorm Warning | BMX | Cullman | 45 min |
| Mar 13, 1:06 AM CST | Severe Thunderstorm Warning | BMX | Morgan | 24 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1986Every severe thunderstorm warning in 1986
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.