Alert archive / Illinois / Tornado Warnings in 1990

Tornado Warning 18, NWS Lincoln, IL

June 17, 1990Champaign County, Piatt County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 17, 1990, 6:47 PM CDT for Champaign County, Piatt County, Illinois. It was in force for 58 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 17, 1990, 6:47 PM CDT (23:47 UTC)
Expired: Jun 17, 1990, 7:45 PM CDT
In force: 58 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties Champaign 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.

What was reported inside it

Time	Report	Where	Remark
Jun 17, 7:00 PM CDT	Thunderstorm Wind 0	Piatt, IL
Jun 17, 7:30 PM CDT	Thunderstorm Wind 0	Champaign, 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

Paducah/Barkley, KY (KPAH), launched 12:00Z, 11.8 hours before the alert went out and 335 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: 1821 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 74 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 172347
TORSPI
ILC147-019-180045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SPRINGFIELD IL
647 PM CDT SUN JUN 17 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE CENTRAL PART OF ILLINOIS
      PIATT...

   IN THE EAST CENTRAL PART OF ILLINOIS
      CHAMPAIGN...

AT 645 PM CDT RADAR INDICATED A TORNADO IN THE VICINITY OF
MONTICELLO IN PIATT COUNTH...20 MILES WEST SOUTHWEST OF CHAMPAIGN.

CITIES IN THE PATH OF THE STORM ARE SEYMORE...BONDVILLE...CHAMPAIGN
AND URBANA.

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.

 ATTN ISP DIST...10
 FS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 3:53 AM CDT	Severe Thunderstorm Warning	ILX	Lee, Ogle	52 min
Jun 17, 4:31 AM CDT	Severe Thunderstorm Warning	ILX	DeKalb	29 min
Jun 17, 5:12 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt	63 min
Jun 17, 6:07 PM CDT	Tornado Warning	ILX	DeWitt, Piatt	38 min
Jun 17, 6:13 PM CDT	Severe Thunderstorm Warning	ILX	Macon	62 min
Jun 17, 6:13 PM CDT	Severe Thunderstorm Warning	ILX	Macoupin, Montgomery	62 min
Jun 17, 6:21 PM CDT	Severe Thunderstorm Warning	ILX	Christian	69 min

Nearby

Tornado Warnings in Illinois, 1990 Every tornado warning in 1990 Tornadoes in 1990

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.