Alert archive / Illinois / Tornado Warnings in 2001

Tornado Warning 3, NWS Chicago, IL

April 21, 2001Livingston County, Illinois

NWS Chicago, IL issued this tornado warning at Apr 21, 2001, 6:59 PM CDT for Livingston County, Illinois. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 21, 2001, 6:59 PM CDT (23:59 UTC)
Expired
Apr 21, 2001, 7:30 PM CDT
In force
31 min
Issued by
NWS Chicago, IL
Area
Whole counties

County Livingston County, IL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 21, 6:00 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 12.0 hours before the alert went out and 83 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, Lincoln, IL at 12:00Z on 2001-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 163 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, Lincoln, IL at 12:00Z on 2001-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 249 square meters per square second.19395878Sfc1 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
163 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
249 m²/s²
0-3 km storm-relative helicity
246 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLOT 220000
TORCHI
ILC105-220030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO IL
659 PM CDT SAT APR 21 2001

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN LIVINGSTON COUNTY IN CENTRAL ILLINOIS
  

* UNTIL 730 PM CDT

* AT 659 PM CDT...DOPPLER RADAR INDICATED A DEVELOPING TORNADO 7
  MILES EAST OF PONTIAC...OR ABOUT 6 MILES NORTH OF FAIRBURY...MOVING
  EAST AT 35 MPH.

* THE TORNADO WILL BE NEAR
  17 MILES SOUTH OF DWIGHT AROUND 705 PM CDT
  7 MILES SOUTH OF EMINGTON AROUND 710 PM CDT
  11 MILES SOUTH OF CAMPUS AROUND 715 PM CDT

GO TO THE BASEMENT AND SEEK SHELTER UNDER THE STAIRS OR UNDER A CHEAVY
PIECE OF FURNITURE.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

$$
VEENEMAN

NNNN

Nearby

Tornado Warnings in Illinois, 2001Every tornado warning in 2001Tornadoes in 2001

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.