Alert archive / Illinois / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 33, NWS Lincoln, IL

June 13, 1990Carroll County, Ogle County, Stephenson County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 13, 1990, 11:54 AM CDT for Carroll County, Ogle County, Stephenson County, Illinois. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1990, 11:54 AM CDT (16:54 UTC)
Expired
Jun 13, 1990, 12:30 PM CDT
In force
36 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Carroll County, IL, Ogle County, IL, Stephenson 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, 4.9 hours before the alert went out and 287 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 1990-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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 1990-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
12 J/kg
Mixed-layer CIN
-302 J/kg
Mixed-layer LCL
1372 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
85 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 131654
SVRRFD
ILC177-015-141-131730-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ROCKFORD IL
1154 AM CDT WED JUN 13 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1230 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTH CENTRAL PART OF ILLINOIS
      SOUTHERN STEPHENSON...NORTHWEST OGLE...

   IN THE NORTHWEST PART OF ILLINOIS
      EASTERN CARROLL...

THIS MORNING AT 1155 CDT RADAR INDICATED A SEVERE THUNDERSTORM
NEAR THE CARROLL AND OGLE COUNTY LINE IN NORTHWEST ILLINOIS. THE
STORM WAS NEAR THE COMMUNITY OF SHANNON IN EXTREME NORTHEAST
CARROLL COUNTY. THIS IS ABOUT 40 MILES WEST SOUTHWEST OF
ROCKFORD.

SOME COMMUNITIES AFFECTED BY THIS SEVERE THUNDERSTORM...
FREEPORT AND FORRESTON...

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING...SO BE ALERT!

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

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 12:38 PM CDTSevere Thunderstorm WarningILXOgle, Winnebago37 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1990Every severe thunderstorm warning 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.