Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 11, NWS Lincoln, IL

May 6, 1986McDonough County, Warren County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 6, 1986, 12:52 PM CDT for McDonough County, Warren County, Illinois. It was in force for 38 min.

The area

The counties it named.

The facts

Issued: May 6, 1986, 12:52 PM CDT (17:52 UTC)
Expired: May 6, 1986, 1:30 PM CDT
In force: 38 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties McDonough County, IL, Warren 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, 5.9 hours before the alert went out and 88 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 KPIA 061752
SVRPIA
ILC187-109-061830-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEORIA IL
1252 PM CDT TUE MAY 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 130 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL ILLINOIS...SOUTHERN WARREN AND NORTHERN MCDONOUGH

AT 1240PM CDT PEA SIZE HAIL AND WINDS TO 60 MPH WERE REPORTED
AT LA HARPE ILLINOIS IN NORTHEAST HANCOCK COUNTY.  LA HARPE IS
ABOUT 65 MILES WEST OF PEORIA.  THIS THUNDERSTORM IS MOVING TO
THE EAST NORTHEAST AT ABOUT 35 TO 40 MPH.

 THIS IS A DANGEROUS STORM.  TAKE COVER IMMEDIATELY !

 REMEMBER A SEVERE THUNDERSTORM CAN PRODUCE fDAMAGING WINDS IN
 EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN
 THAT CAN QUICKY FLOOD A LOW LYING AREA.

ATTN ISP 14

ARMBRUST

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, 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, 3:41 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	64 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.