Alert archive / Illinois / Tornado Warnings in 1986

Tornado Warning 7, NWS Lincoln, IL

July 10, 1986DeWitt County, Piatt County, Illinois

NWS Lincoln, IL issued this tornado warning at Jul 10, 1986, 8:09 PM CDT for DeWitt County, Piatt County, Illinois. It was in force for 21 min.

The area

The counties it named.

The facts

Issued
Jul 10, 1986, 8:09 PM CDT (01:09 UTC)
Expired
Jul 10, 1986, 8:30 PM CDT
In force
21 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties DeWitt County, IL, Piatt 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

Salem-Leckrone, IL (KSLO), launched 00:00Z, 1.2 hours before the alert went out and 161 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, Salem-Leckrone, IL at 00:00Z on 1986-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 933 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, Salem-Leckrone, IL at 00:00Z on 1986-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
933 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
1223 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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 KSPI 110109
TORSPI
ILC039-147-110130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
809 PM CDT THU JUL 10 1986

THE NATIONAL WEATHER SERVI

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 7:35 PM CDTSevere Thunderstorm WarningILXDeWitt, Macon55 min
Jul 10, 7:57 PM CDTSevere Thunderstorm WarningILXCass, Morgan63 min
Jul 10, 7:57 PM CDTSevere Thunderstorm WarningILXMenard63 min
Jul 10, 8:01 PM CDTSevere Thunderstorm WarningILXPiatt59 min
Jul 10, 8:17 PM CDTSevere Thunderstorm WarningILXSangamon58 min
Jul 10, 8:45 PM CDTTornado WarningILXChampaign30 min
Jul 10, 8:55 PM CDTTornado WarningILXMacon35 min
Jul 10, 9:05 PM CDTTornado WarningILXDouglas, Edgar, Vermilion25 min
Jul 10, 9:50 PM CDTTornado WarningILXChampaign25 min
Jul 11, 2:59 PM CDTSevere Thunderstorm WarningILXEdgar, Vermilion61 min

Nearby

Tornado Warnings in Illinois, 1986Every tornado warning in 1986Tornadoes 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.