Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 82, NWS Lincoln, IL

October 13, 1986Stephenson County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Oct 13, 1986, 4:25 AM CDT for Stephenson County, Illinois. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Oct 13, 1986, 4:25 AM CDT (09:25 UTC)
Expired
Oct 13, 1986, 5:30 AM CDT
In force
65 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Stephenson 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, 9.4 hours before the alert went out and 187 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 1986-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 1986-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.1939587897117Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
754 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
100 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 130925
SVRRFD
ILC177-131030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCKFORD IL
425 AM CDT MON OCT 13 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 530 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTHWEST ILLINOIS...EXTREME STEPHENSON

 AT 510 PM CDT A SEVERE THUNDERSTORM WAS LOCATED 40 MILES NORTH
 WEST OF ROCKFORD IL NEAR LENA IN STEPHENSON COUNTY IL. TREE AND
 BUILDING DAMAGE HAS BEEN REPORTED WITH STORM.

 A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS OF 60 MPH OR
 OR GREATER.. LARGE HAIL.. DANGEROUS LIGHTNING AND HEAVY RAIN THAT
 CAN QUICKLY FLOOD A LOW LYING AREA.

 ATTN:IS$P DIST 16
 DRAUS

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.