Alert archive / Illinois / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 21, NWS Lincoln, IL

June 7, 1993Ogle County, Winnebago County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 7, 1993, 8:33 AM CDT for Ogle County, Winnebago County, Illinois. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jun 7, 1993, 8:33 AM CDT (13:33 UTC)
Expired
Jun 7, 1993, 9:00 AM CDT
In force
27 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Ogle County, IL, Winnebago County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 1.6 hours before the alert went out and 271 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 1993-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1993-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
142 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 
WUUS1 KRFD 071333 RRA
SVRRFD
ILC201-141-071400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ROCKFORD IL
833 AM CDT MON JUN 7 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 900 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

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

AT 830 CDT THIS MORNING SEVERE THUNDERSTORMS PRODUCING GOLF BALL
SIZE HAIL WERE LOCATED OVER A LARGE PART OGLE COUNTY. THEY WERE
MOVING TO THE NORTHEAST AT 35 MPH.

SOME COMMUNITIES THAT WILL BE AFFECTED BY THIS SEVERE THUNDERSTORM...
LEAF RIVER...MT MORRIS...OREGON...BYRON...GRAND DETOUR...ALL IN
OGLE COUNTY. AND THE GREATER ROCKFORD METRO AREA IN WINNEBAGO CO.

IF YOU ARE IN A REGION THREATENED BY THE STORM...MOVE OUT OF AREAS
THAT ARE PRONE TO FLOODING...AND GO TO A REINFORCED SHELTER!
DAMAGING WINDS...LARGE HAIL...DANGEROUS LIGHTNING AND VERY HEAVY
RAINFALL THAT CAN QUICKLY FLOOD A LOW LYING AREA IS IMMINENT!
REMEMBER ALSO...SEVERE THUNDERSTORMS CAN AND DO PRODUCE TORNADOES
WITH LITTLE OR NO WARNING...SO BE ALERT!

FIELDS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 8:48 AM CDTSevere Thunderstorm WarningILXLee42 min
Jun 7, 9:03 AM CDTSevere Thunderstorm WarningILXDeKalb, Ogle42 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1993Every severe thunderstorm warning 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.