Alert archive / Illinois / Tornado Warnings in 1987

Tornado Warning 13, NWS Lincoln, IL

June 1, 1987Vermilion County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 1, 1987, 1:50 PM CDT for Vermilion County, Illinois. It was in force for 25 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: Jun 1, 1987, 1:50 PM CDT (18:50 UTC)
Expired: Jun 1, 1987, 2:15 PM CDT
In force: 25 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Vermilion 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

Time	Report	Where	Remark
Jun 1, 1:50 PM CDT	Tornado F0	Vermilion, IL
Jun 1, 1:53 PM CDT	Tornado F0	Vermilion, 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, 6.8 hours before the alert went out and 167 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 815 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 110 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 011850
TORSPI
ILC183-011915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
150 PM CDT MON JUN 1 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 215 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

EAST CENTRAL ILLINOIS...VERMILION

ILLINOIS STATE POLICE REPORTS A TORNADO TOUCHDOWN NEAR POTOMAC
ILLINOIS...10 MILES NORTHWEST OF DANVILLE ILLINOIS. THE TORNADO
WAS MOVING EAT AT 25 MPH.

IF YOU ARE IN THE PATH OF A TORNADO...GO TO A BASEMENT SHELTER
IF AVAILABLE...OTHERWISE TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR.  ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.

IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND DANGEROUS LIGHTING.

THIS IS A DANGEROUS STORM.  TAKE COVER IMMEDIATELY.

 ATTN ISP DIST...10
 HUGHES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:54 PM CDT	Severe Thunderstorm Warning	ILX	Bureau	66 min
May 31, 9:50 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell, Woodford	55 min
Jun 1, 2:21 PM CDT	Tornado Warning	ILX	Vermilion	24 min

Nearby

Tornado Warnings in Illinois, 1987 Every tornado warning in 1987 Tornadoes in 1987

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.