Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 59, NWS St. Louis, MO

September 19, 1986Adams County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 19, 1986, 12:36 PM CDT for Adams County, Illinois. It was in force for 44 min. 2 reports 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
Sep 19, 1986, 12:36 PM CDT (17:36 UTC)
Expired
Sep 19, 1986, 1:20 PM CDT
In force
44 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Adams 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
Sep 19, 1:10 PM CDTHail 0.75Adams, IL
Sep 19, 1:13 PM CDTHail 0.75Adams, 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 12:00Z, 5.6 hours before the alert went out and 154 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 12:00Z on 1986-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 102 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 12:00Z on 1986-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
102 J/kg
Mixed-layer CIN
-224 J/kg
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 191736
SVRSTL
ILC001-191820-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1236 PM CDT FRI SEP 19 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 120 PM CDT FOR THE FOLLOWING COUNTY OF
 
WEST CENTRAL ILLINOIS... ADAMS
                                                                         
WEATHER SERVICE RADAR INDICATES AN INTENSE THUNDERSTORM 10 MILES  
NORTHWEST OF QUINCY ILLINOIS.  THIS THUNDERSTORMS WAS MOVING TO  
THE EAST AT 25 MPH.  LARGE HAIL AND DAMAGING WIND MAY ACCOMPANY THIS  
STORM AS IT MOVES THROUGH ADAMS COUNTY. 
 
THERSE THUNDERSTORMS MAY PRODUCE LARGE HAIL...HEAVY RAINS...
DAMAGING WINDS AND DANGEROUS LIGHTNING.
 
DJ

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 19, 1:23 PM CDTSevere Thunderstorm WarningLSXAdams, Brown, Pike57 min
Sep 19, 2:15 PM CDTSevere Thunderstorm WarningLSXScott45 min
Sep 19, 3:01 PM CDTSevere Thunderstorm WarningLSXGreene, Scott49 min

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.