Alert archive / Mississippi / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 41, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 12, 1986, 2:48 AM CST for Jefferson County, Mississippi. It was in force for 57 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
- Apr 12, 1986, 2:48 AM CST (08:48 UTC)
- Expired
- Apr 12, 1986, 3:45 AM CST
- In force
- 57 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Jefferson 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, 3:05 AM CST | Tornado F1 | Jefferson, MS | |
| Apr 12, 3:30 AM CST | Hail 1.75 | Jefferson, 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, 8.8 hours before the alert went out and 111 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 19 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, 2:41 AM CST | Severe Thunderstorm Warning | JAN | Jefferson Davis, Lawrence, Marion | 49 min |
| Apr 12, 2:48 AM CST | Severe Thunderstorm Warning | JAN | Claiborne, Warren | 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.