Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 48, NWS Lincoln, IL

July 11, 1986Edgar County, Vermilion County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 11, 1986, 2:59 PM CDT for Edgar County, Vermilion County, Illinois. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Jul 11, 1986, 2:59 PM CDT (19:59 UTC)
Expired
Jul 11, 1986, 4:00 PM CDT
In force
61 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Edgar County, IL, Vermilion 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 12:00Z, 8.0 hours before the alert went out and 174 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 12:00Z on 1986-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1572 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 12:00Z 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
1572 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
682 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 111959
SVRSPI
ILC183-045-112100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
259 PM CDT FRI JUL 11 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

EAST CENTRAL ILLINOIS...SOUTHERN VERMILION AND EDGAR

AT 257PM  A SEVERE THUNDERSTORM WAS INDICATED BY RADAR IN WESTERN
EDGAR COUNTY NEAR BORTON ILLINOIS..ABOUT 27 MILES NORTHEAST OF
MATTOON ILLINOIS. THE SEVERE THUNDERSTORM WAS MOVING EAST NORTHEAST
AT 30 MPH.

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

 ZATTN ISP DIST..10
 HUGHES

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, Jul 11, 2:16 PM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD IL
210 PM CDT FRI JUL 11 1986

AT 205 PM RADAR INDICATED A RAPIDLY DEVELOPING LINE OF STRONG
THUNDERSTORMS EXTENDING FROM WATSEKA ILLINOIS TO MATTOON ILLINOIS
TO SHELBYVILLE ILLINOIS TO HILLSBORO ILLINOIS TO NEAR ST LOUIS
MISSOURI.

THE THUNDERSTORMS ALONG THIS LINE ARE MOVING EAST NORTHEAST AT 25
MILES AN HOUR.

STRONG GUSTY WINDS..SOME HAIL..DANGEROUS LIGHTNING AND VERY HEAVY
DOWN.POURS CAN BE EXPECTED WITH THESE THUNDERSTORMS.

HUGHES
Special weather statement, Jul 11, 2:46 PM CDT, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD IL
245 PM CDT FRI JUL 11 1986

AT 243 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS OVER
EAST CENTRAL ILLINOIS. THE LINE EXTENDED FROM NEAR DANVILLE
ILLINOIS TO MATTOON ILLINOIS TO JUST NORTH OF VANDALIA ILLINOIS.

THE THUNDERSTORMS ALONG THIS LINE WERE MOVING EAST NORTHEAST AT 25
MILES AN HOUR.

STRONG GUSTY WINDS..SOME HAIL..DANGEROUS LIGHTNING AND VERY HEAVY
RAIN CAN BE EXPECTLED WITH THESE THUNDERSTORMS.

HUGHES

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, 8:09 PM CDTTornado WarningILXDeWitt, Piatt21 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

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.