Alert archive / Illinois / Tornado Warnings in 1987

Tornado Warning 21, NWS Lincoln, IL

June 29, 1987McLean County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 29, 1987, 2:43 PM CDT for McLean County, Illinois. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Jun 29, 1987, 2:43 PM CDT (19:43 UTC)
Expired
Jun 29, 1987, 3:30 PM CDT
In force
47 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County McLean 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

Peoria Regional, IL (KPIA), launched 12:00Z, 7.7 hours before the alert went out and 67 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, Peoria Regional, IL at 12:00Z on 1987-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 732 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, Peoria Regional, IL at 12:00Z on 1987-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 218 square meters per square second.193958Sfc1 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
732 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
1148 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
218 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIA 291943
TORPIA
ILC113-292045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE PEORIA IL
243 PM CDT MON JUN 29 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 345 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

CENTRAL ILLINOIS...CENTRAL AND EASTERN MCLEAN

AT 230 PM CDT A FUNNEL CLOUD WAS REPORTED BY THE BLOOMINGTON
AIRPORT TOWER 5 MILES SOUTH OF BLOOMINGTON IN MCLEAN COUNTY.

TOWNS IN THE PATH OF THIS STORM ARE BENTOWN...FLETCHER...HOLDER...
ELLSWORTH...ARROWSMITH...COOKSVILLE...COLFAX AND ANCHOR.
THIS FUNNEL CLOUD WAS MOVING NORTHEAST AT 40 MPH.

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 LIGHTNING.

ATTN ISP  DIST. 6

NADOLSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 3:04 PM CDTSevere Thunderstorm WarningILXVermilion41 min
Jun 29, 4:47 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion43 min

Nearby

Tornado Warnings in Illinois, 1987Every tornado warning in 1987Tornadoes 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; the sounding from the Mesonet's radiosonde archive.