Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 15, NWS Lincoln, IL

May 6, 1986Champaign County, Vermilion County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 6, 1986, 3:41 PM CDT for Champaign County, Vermilion County, Illinois. It was in force for 64 min.

The area

The counties it named.

The facts

Issued: May 6, 1986, 3:41 PM CDT (20:41 UTC)
Expired: May 6, 1986, 4:45 PM CDT
In force: 64 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties Champaign County, IL, Vermilion County, IL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 12:00Z, 8.7 hours before the alert went out and 149 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1430 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: -76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -5.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSPI 062041
SVRSPI
ILC019-183-062145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
341 PM CDT TUE MAY 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 445 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

EAST CENTRAL ILLINOIS...CHAMPAIGN AND VERMILION

AT 333PM, GOLF BALL SIZE HAIL WAS REPORTED 10 MILES NORTHWEST OF
CHAMPAIGN ILLINOIS..NEAR MAHOMET ILLINOIS.
THE SEVERE THUNDERSTORM PRODUCING THE LARGE HAIL WAS MOVING EAST
AT 40 MPH.

REMEMBER..A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS
OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING AND HEAVY RAINS THAT CAN
QUICKLY 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..10
 HUGHES

y

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 6, 12:20 PM CDT	Severe Thunderstorm Warning	ILX	Hancock	55 min
May 6, 12:52 PM CDT	Severe Thunderstorm Warning	ILX	McDonough, Warren	38 min
May 6, 1:53 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Peoria, Woodford	67 min
May 6, 2:16 PM CDT	Severe Thunderstorm Warning	ILX	Mason, Tazewell	2 hr
May 6, 2:30 PM CDT	Severe Thunderstorm Warning	ILX	Hancock, McDonough, Schuyler	60 min
May 6, 3:46 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Hancock, McDonough, Schuyler	74 min
May 6, 5:01 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, McDonough, Mason, Schuyler, Tazewell	59 min
May 6, 5:22 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard	68 min
May 6, 5:22 PM CDT	Severe Thunderstorm Warning	ILX	Logan	68 min
May 6, 6:07 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon	68 min
May 6, 6:45 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon	60 min
May 6, 6:56 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon	64 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1986 Every 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; the sounding from the Mesonet's radiosonde archive.