Alert archive / Illinois / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 71, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Aug 28, 1990, 2:58 PM CDT for DeKalb County, Illinois. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Aug 28, 1990, 2:58 PM CDT (19:58 UTC)
- Expired
- Aug 28, 1990, 3:30 PM CDT
- In force
- 32 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County DeKalb 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, 8.0 hours before the alert went out and 293 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KRFD 281958
SVRRFD
ILC037-282030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCKFORD IL
258 PM CDT TUE AUG 28 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTH CENTRAL PART OF ILLINOIS
SOUTHERN DEKALB
THIS AFTERNOON AT 300 CDT A SEVERE THUNDERSTORM...PRODUCING HAIL
IN EXCESS OF ONE INCH IN DIAMETER...WAS LOCATED OVER THE CITY
OF DEKALB...DEKALB COUNTY...ILLINOIS. IT WAS MOVING TO THE
SOUTHEAST AT 20 TO 25 MPH. THIS WARNING IS FROM THE CITY OF DEKALB
ON THROUGH THE SOUTH END OF THE COUNTY.
SOME COMMUNITIES THAT WILL BE AFFECTED BY THIS SEVERE THUNDERSTORM...
DEKALB...HINCKLEY...AND SANDWICH.
IF YOU ARE IN AN AREA THREATENED BY THE STORM... GO TO A REINFORECED
SHELTER. SEVERE THUNDERSTORMS CAN PRODUCE WINDS OF 60 MPH OR
GREATER... LARGE HAIL... DANGEROUS LIGHTNING AND HEAVY RAIN THAT
CAN QUICKLY FLOOD A LOW LYING AREA.
REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ALERT!
ATTN: ISP DIST 1..2..16 FIELDSWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 28, 2:33 PM CDT, 25 minutes before
ILZ005-006-007-009-282030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 230 PM CDT TUE AUG 28 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR CENTRAL ILLINOIS UNTIL 8 PM... AT 225 PM CDT RADAR INDICATED SCATTERED SHOWERS AND THUNDERSTORMS OVER NORTHERN AND CENTRAL ILLINOIS. IN CENTRAL ILLINOIS THE SHOWERS AND THUNDERSTORMS WERE GENERALLY EAST OF A LINE FROM MINONK...35 MILES NORTHEAST OF PEORIA TO MACKINAW...15 MILES SOUTHEAST OF PEORIA. THE STRONGEST STORMS HOWEVER WERE REPORTED IN NORTHERN ILLINOIS NEAR ROCKFORD. MOVEMENT WAS TO THE EAST AT 25 MILES AN HOUR. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS CENTRAL ILLINOIS. SOME OF THESE STORMS MAY BgE CONTAIN STRONG GUSTY WINDS...LARGE HAIL...HEAVY RAIN...AND DANGEROUS LIGHTNING. STAY TUNED TO TV...RADIO OR LISTEN TO NOAA WEATHER RADIO FOR FURTHER INFORMATION AND UPDATES. NELSON
Special weather statement, Aug 28, 2:38 PM CDT, 20 minutes before
ILZ005-006-007-009-282030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 230 PM CDT TUE AUG 28 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR CENTRAL ILLINOIS UNTIL 8 PM... AT 225 PM CDT RADAR INDICATED SCATTERED SHOWERS AND THUNDERSTORMS OVER NORTHERN AND CENTRAL ILLINOIS. IN CENTRAL ILLINOIS THE SHOWERS AND THUNDERSTORMS WERE GENERALLY EAST OF A LINE FROM MINONK...35 MILES NORTHEAST OF PEORIA TO MACKINAW...15 MILES SOUTHEAST OF PEORIA. THE STRONGEST STORMS HOWEVER WERE REPORTED IN NORTHERN ILLINOIS NEAR ROCKFORD. MOVEMENT WAS TO THE EAST AT 25 MILES AN HOUR. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS CENTRAL ILLINOIS. SOME OF THESE STORMS MkAY CONTAIN STRONG GUSTY WINDS...LARGE HAIL...HEAVY RAIN...AND DANGEROUS LIGHTNING. STAY TUNED TO TV...RADIO OR LISTEN TO NOAA WEATHER RADIO FOR FURTHER INFORMATION AND UPDATES. NELSON
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 1:39 PM CDT | Tornado Warning | ILX | Boone, DeKalb, Winnebago | 51 min |
| Aug 28, 1:57 PM CDT | Tornado Warning | ILX | Ogle | 33 min |
| Aug 28, 2:29 PM CDT | Severe Thunderstorm Warning | ILX | DeKalb | 31 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.