Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 2, NWS Lincoln, IL

April 25, 1986Lee County, Ogle County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 25, 1986, 6:32 PM CST for Lee County, Ogle County, Illinois. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Apr 25, 1986, 6:32 PM CST (00:32 UTC)
Expired
Apr 25, 1986, 7:30 PM CST
In force
58 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Lee County, IL, Ogle 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 00:00Z, 0.5 hours before the alert went out and 138 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 1986-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1042 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 1986-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
1042 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
2510 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRFD 260032
SVRRFD
ILC141-103-260130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCKFORD IL
632 PM CST FRI APR 25 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 730 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTH CENTRAL ILLINOIS...SOUTHERN OGLE AND LEE

 AT 630 PM CST ONE INCH HAIL WAS REPORTED IN EXTREME SOUTHEAST
 CARROLL COUNTY.. ABOUT 40 MILES SOUTHWEST OF ROCKFORD.  MOVEMENT
 OF THE STORM WAS EAST AT 25 MILES AN HOUR.

 THESE COMMUNITIES WILL BE AFFECTED BY THIS SEVERE THUNDERSTORM...
 DIXON.. POLO.. ASHTON.. AND GRAND DETOUR.

 A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS OF 60 MPH.. LARGE
 HAIL.. DANGEROUS LIGHTNING AND HEAVY RAIN THAT CAN FLOOD LOW AREAS.

 THIS IS A SLOW MOVING STORM PRODUCING VERY HEAVY RAINS AND MAY
 PRODUCE MINOR FLOODING OF STREAMS.. URBAN AND LOW LYING AREAS.

 ATTN:ISP DIST 1
 PIERCE    TRAVEL+ERS AND CAMPERS BE ALERT FOR RAPIDLY RISING WATER THAT MAY
 COVER ROADS OR BE DANGEROUS TO YOUR CAMPSITES.

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; the sounding from the Mesonet's radiosonde archive.