Alert archive / Illinois / Tornado Warnings in 1990

Tornado Warning 17, NWS Lincoln, IL

June 17, 1990DeWitt County, Piatt County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 17, 1990, 6:07 PM CDT for DeWitt County, Piatt County, Illinois. It was in force for 38 min.

The area

The counties it named.

The facts

Issued: Jun 17, 1990, 6:07 PM CDT (23:07 UTC)
Expired: Jun 17, 1990, 6:45 PM CDT
In force: 38 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

Paducah/Barkley, KY (KPAH), launched 12:00Z, 11.1 hours before the alert went out and 336 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 172307
TORSPI
ILC039-147-172345-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE CENTRAL PART OF ILLINOIS
      EASTERN DE WITT...PIATT

   AT 605 PM CDT WEATHER RADARS INDICATED SEVERE THUNDERSTORMS
   IN EASTERN DE-WITT COUNTY WITH POSSIABLE HOOK ECHO.

   THE SEVERE THUNDERSTORMS WAS MOVING EAST AT 35 MPH.

FUNNEL CLOUDS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE
TO A PLACE OF SAFETY.

THIS IS A DANGEROUS STORM.  TAKE COVER IMMEDIATELY.

 ATTN ISP DIST...6 ..10
 HILLIARD

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, 6:13 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
Jun 17, 6:47 PM CDT	Tornado Warning	ILX	Champaign, Piatt	58 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; the sounding from the Mesonet's radiosonde archive.