Alert archive / Illinois / Tornado Warnings in 1993

Tornado Warning 9, NWS Lincoln, IL

June 17, 1993Ogle County, Winnebago County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 17, 1993, 5:59 PM CDT for Ogle County, Winnebago County, Illinois. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Jun 17, 1993, 5:59 PM CDT (22:59 UTC)
Expired
Jun 17, 1993, 6:30 PM CDT
In force
31 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Ogle County, IL, Winnebago County, IL

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 11.0 hours before the alert went out and 459 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, Minneapolis, MN at 12:00Z on 1993-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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, Minneapolis, MN at 12:00Z on 1993-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
13 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
540 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
-16 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 KRFD 172259
TORRFD
ILC201-141-172330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE ROCKFORD IL
559 PM CDT THU JUN 17 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTH CENTRAL PART OF ILLINOIS
      WINNEBAGO...OGLE

AT 555 PM...SURFACE REPORTS INDICATED TORNADOES TOUCHING DOWN IN
OGLE COUTNY AND WINNEBAGO COUNTY.

IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...TAKE COVER IN A
BASEMENT OR SMALL CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR!  ABANDON
CARS...FARM MACHINERY AND MOBILE HOMES FOR A REINFORCED BUILDING...OR
A DITCH...CULVERT OR RAVINE!  THIS IS A SERIOUS SITUATION...YOUR LIFE
MAY DEPEND ON HOW QUICKLY YOU RESPOND TO THIS TORNADO WARNING!

PETROVICH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 1:56 PM CDTSevere Thunderstorm WarningILXStephenson49 min
Jun 17, 2:48 PM CDTSevere Thunderstorm WarningILXStephenson42 min
Jun 17, 5:26 PM CDTSevere Thunderstorm WarningILXLee, Ogle49 min
Jun 17, 6:29 PM CDTSevere Thunderstorm WarningILXBoone, Winnebago46 min
Jun 17, 6:52 PM CDTSevere Thunderstorm WarningILXCarroll31 min

Nearby

Tornado Warnings in Illinois, 1993Every tornado warning in 1993Tornadoes in 1993

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.