Alert archive / Mississippi / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 39, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 12, 1986, 2:41 AM CST for Jefferson Davis County, Lawrence County, Marion County, Mississippi. It was in force for 49 min. 3 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
- Apr 12, 1986, 2:41 AM CST (08:41 UTC)
- Expired
- Apr 12, 1986, 3:30 AM CST
- In force
- 49 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
Counties Jefferson Davis County, MS, Lawrence County, MS, Marion County, MS
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 |
|---|---|---|---|
| Apr 12, 3:00 AM CST | Hail 0.75 | Jefferson Davis, MS | |
| Apr 12, 3:15 AM CST | Hail 0.75 | Lawrence, MS | |
| Apr 12, 3:20 AM CST | Hail 1.75 | Marion, MS |
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
Jackson, MS (KJAN), launched 00:00Z, 8.7 hours before the alert went out and 98 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2271 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 75 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 KJAN 120841 SVRJAN MSC065-077-091-120930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 241 AM CST SAT APR 12 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 AM CST FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL MISSISSIPPI...JEFFERSON DAVIS...LAWRENCE AND MARION AT 238 AM CST...JACKSON RADAR WAS DETECTING A SEVERE THUNDERSTORM ABOUT 5 MILES SOUTH OF MONTICELLO. THIS THUNDERSTORM IS MOVING SLIGHTLY SOUTH OF EAST AT 35 MPH. THIS IS A DANGEROUS STORM THAT ALREADY HAS A HISTORY OF SEVERE WEATHER. PERSONS IN ITS PATH SHOULD SEEK IMMEDIATE SHELTER IN A REINFORCED BUILDING. THIS WARNING REPLACE THE WARNING WHICH WAS ISSUED AT 210AM CST.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Apr 12, 2:29 AM CST, 12 minutes before
STORM REPORT NATIONAL WEATHER SERVICE JACKSON MS 230 AM CST SAT APR 12 1986 140 AM CST...GOLF BALL SIZE HAIL AND POWER OUT AT LORMAN IN NORTHERN JEFFERSON COUNTY. 205 AM CST...GOLF BALL SIZE HAIL ON THE JEFFERSON/LINCOLN COUNTY LINE. <<
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 12:56 AM CST | Severe Thunderstorm Warning | JAN | Claiborne | 64 min |
| Apr 12, 2:10 AM CST | Severe Thunderstorm Warning | JAN | Lawrence, Lincoln | 50 min |
| Apr 12, 2:48 AM CST | Severe Thunderstorm Warning | JAN | Claiborne, Warren | 57 min |
| Apr 12, 2:48 AM CST | Severe Thunderstorm Warning | JAN | Jefferson | 57 min |
| Apr 12, 3:38 AM CST | Severe Thunderstorm Warning | JAN | Franklin, Lincoln | 37 min |
| Apr 12, 4:17 AM CST | Severe Thunderstorm Warning | JAN | Lincoln | 43 min |
| Apr 12, 4:39 AM CST | Severe Thunderstorm Warning | JAN | Pike | 21 min |
| Apr 12, 4:39 AM CST | Severe Thunderstorm Warning | JAN | Walthall | 51 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 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.