Alert archive / Illinois / Tornado Warnings in 1990

Tornado Warning 29, NWS Lincoln, IL

August 28, 1990Ogle County, Illinois

NWS Lincoln, IL issued this tornado warning at Aug 28, 1990, 1:57 PM CDT for Ogle County, Illinois. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Aug 28, 1990, 1:57 PM CDT (18:57 UTC)
Expired
Aug 28, 1990, 2:30 PM CDT
In force
33 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Ogle 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.0 hours before the alert went out and 288 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, Green Bay/Straub, WI at 12:00Z on 1990-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2944 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, Green Bay/Straub, WI at 12:00Z on 1990-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.1939587897Sfc1 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
2944 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
575 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRFD 281857
TORRFD
ILC141-281930-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE ROCKFORD IL
1257 PM CST TUE AUG 28 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 130 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE NORTH CENTRAL PART OF ILLINOIS
      OGLE

AT 158 PM CDT A FUNNEL CLOUD WAS REPORTED HEADED TOWARD BYRON
IN OGLE COUNTY ILLINOIS...ABOUT 15 MILES SOUTHWEST OF ROCKFORD
ILLINOIS.

SOME COMMUNITIES THAT WILL BE AFFECTED BY THIS TORNADO...
BYRON...AND OREGON.

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

ATTN: ISP DIST  1..2..16                             FIELDS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 1:39 PM CDTTornado WarningILXBoone, DeKalb, Winnebago51 min
Aug 28, 2:29 PM CDTSevere Thunderstorm WarningILXDeKalb31 min
Aug 28, 2:58 PM CDTSevere Thunderstorm WarningILXDeKalb32 min

Nearby

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