Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 34, NWS Lincoln, IL

June 14, 1986Menard County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 14, 1986, 7:14 PM CDT for Menard County, Illinois. It was in force for 61 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
Jun 14, 1986, 7:14 PM CDT (00:14 UTC)
Expired
Jun 14, 1986, 8:15 PM CDT
In force
61 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Menard 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

TimeReportWhereRemark
Jun 14, 7:40 PM CDTThunderstorm Wind 70Menard, 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

Peoria Regional, IL (KPIA), launched 00:00Z, 0.2 hours before the alert went out and 74 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-pSkew-T log-p diagram, Peoria Regional, IL at 00:00Z on 1986-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 636 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peoria Regional, IL at 00:00Z on 1986-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
636 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
771 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
275 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSPI 150014
SVRSPI
ILC129-150115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
714 PM CDT SAT JUN 14 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 815 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

CENTRAL ILLINOIS...MENARD

AT 710 PM CDT WEATHER SERVICE RADAR INDICATES A SEVERE THUNDERSTORM
IN NORTHWEST MENARD COUNTY 28 MILES NORTHWEST OF SPRINGFIELD
ILLINOIS.

THIS SEVERE THUNDERSTORM WAS MOVING TOWARD EAST SOUTHEAST AT 25
MPH.

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

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, Jun 14, 5:45 PM CDT, 1 hour 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD IL
545 PM CDT SAT JUN 14 1986

...VERY STRONG THUNDERSTORMS IN WEST-CENTRAL AND SOUTHWEST ILLINOIS...

AT 540 PM CDT WEATHER SERVICE RADARS SHOWS AN AREA OF SHOWERS AND
THUNDERSTORMS WEST OF A LINE FROM JUST NORTH OF ST. LOUIS MISSOURI
TO JUST WEST OF PEORIA ILLINOIS.

THE STRONGEST THUNDERSTORMS WERE LOCATED JUST SOUTHWEST OF MACOMB
ILLINOIS IN MC DONOUGH COUNTY AND IN NORTHERN CALHOUN COUNTY.
THESE STORMS ARE CAPABLE OF PRODUCING HEAVY RAINS..STRONG GUSTY WINDS
..AND HAIL.

THE AREA OF SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 20 TO 25
MPH.
NO SEVERE WEATHER HAS BEEN REPORTED TO THE WEATHER SERVICE OFFICE IN
SPRINGFIEL>D DURING THE PAST HOUR.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE WEST-CENTRAL

ILLINOIS COUNTIES OF..SANGAMON..CASS..MORGAN AND MACOUPIN UNTIL
10 PM CDT THIS SATURDAY EVENING.

HILLIARD
Special weather statement, Jun 14, 5:57 PM CDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
550 PM CDT SAT JUN 14 1986

...HEAVY THUNDERSTORMS IN WEST CENTRAL ILLINOIS...

AT 5 45PM A AREA OF HEAVY THUNDERSTORMS WERE LOCATED IN WEST CENTRAL
ILLINOIS...FROM MACOMB TO VERMONT TO RUSHVILLE OR ABOUT 50 MILES
SOUTHWEST OF PEORIA ILLINOIS.

HEAVY RAIN AND SOME PEA SIZE AND OCCASIONAL MARBLE SIZE HAIL WITH
WINDS GUST TO ABOUT 30 MPH.

THESE STORMS WERE MOVING TO THE EAST AT ABOUT 2I0 MPH...AND WILL BE
MOVING INTO SOUTHERN FULTON AND MASON COUNTIES WITHIN THE NEXT HOUR.

GEER

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.