Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 6, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Apr 30, 1986, 6:40 PM CDT for 4 counties in Illinois. It was in force for 50 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 30, 1986, 6:40 PM CDT (23:40 UTC)
- Expired
- Apr 30, 1986, 7:30 PM CDT
- In force
- 50 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Christian County, IL, Macon County, IL, Moultrie County, IL, Shelby County, IL
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 30, 7:00 PM CDT | Thunderstorm Wind 0 | Macon, IL |
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
Salem-Leckrone, IL (KSLO), launched 12:00Z, 11.7 hours before the alert went out and 107 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
- 1835 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 304 m²/s²
- 0-3 km storm-relative helicity
- 331 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 KSPI 302343 SVRSPI ILC115-139-173-021-010030- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SPRINGFIELD IL 640 PM CDT WED APR 30 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF CENTRAL ILLINOIS...MACON...SHELBY...MOULTRIE AND CHRISTIAN AT 636PM, A SEVERE THUNDERSTORM WAS LOCATED NEAR DECATUR ILLINOIS AND 25 MILES SOUTHWEST OF DECATUR ILLINOIS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES PER HOUR. REMEMBER..A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING AND HEAVY RAINS THAT CAN QUzICKLY FLOOD A LOW LYING AREA. IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A SAFE PLACE. ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. ATTN ISP DIST..9 10 HUGHES
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
Special weather statement, Apr 30, 6:03 PM CDT, 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 555 PM CDT WED APR 30 1986 THE SEVERE THUNDERSTORM WARNING THAT WENT OUT OVER WEATHER WIRE FOR THE ILLINOIS COUNTIES FOR COLES..EDGAR ANDc CLARK WAS SENT BY MISTAKE. DISREGARD WARNINGS FOR COLES..EDGAR AND CLARK. HILLIARD
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 5:15 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Menard, Sangamon | 75 min |
| Apr 30, 6:25 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Piatt | 65 min |
| Apr 30, 6:25 PM CDT | Severe Thunderstorm Warning | ILX | Champaign | 65 min |
| Apr 30, 6:50 PM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 70 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 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.