Alert archive / Illinois / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 88, NWS Lincoln, IL

July 30, 1992Macon County, Piatt County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 30, 1992, 12:40 AM CDT for Macon County, Piatt County, Illinois. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jul 30, 1992, 12:40 AM CDT (05:40 UTC)
Expired
Jul 30, 1992, 1:15 AM CDT
In force
35 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Macon County, IL, Piatt County, IL

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 5.7 hours before the alert went out and 319 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, Paducah/Barkley, KY at 00:00Z on 1992-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 813 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, Paducah/Barkley, KY at 00:00Z on 1992-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
813 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What 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, Jul 29, 9:56 PM CDT, 2 hours 44 minutes before
ILZ009-010-300415-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD IL
955 PM CDT WED JUL 29 1992

...STRONG THUNDERSTORMS HAVE DEVELOPED OVER EAST CENTRAL ILLINOIS...

AT 950 PM CDT...RADAR INDICATED TWO STRONG THUNDERSTORMS HAD DEVELOPED
OVER EAST CENTRAL ILLINOIS.  THE STORMS WERE LOCATED 10 TO 15 MILES
SOUTH OF CHAMPAIGN.  THE STORMS WERE MOVING TO THE SOUTHEAST AT 25 MPH.
LOCALLY HEAVY RAIN...SMALL HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING
MAY ACCOMPANY THESE STORMS.

ALSO...RADAR INDICATED A 15 MILE WIDE LINE OF SHOWERS AND THUNDERSTORMS
WHICH EXTENDED FROM 20 MILES WEST OF JOLIET TO 10 MILES SOUTH OF PEORIA
TO 10 MILES NORTH OF QUINCY.  THE STORMS WERE MOVING TO THE SOUTHEAST
AT 25 MILES AN HOUR AND WILL MOVE INTO NORTHERN AND WESTERN SECTIONS OF
CENTRAL ILLINOIS BY 11 PM.

SKIES WILL REMAIN PARTLY TO MOSTLY CLOUDY THIS EVENING WITH SHOWERS AND
THUNDERSTORMS POSSIBLE.  TEMPERATURES WILL DROP TO AROUND 70 BY
MIDNIGHT.

BE ALERT TO THE RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR
FURTHER UPDATES.

BYRD
Special weather statement, Jul 29, 10:26 PM CDT, 2 hours 14 minutes before
ILZ005>007-009-300400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
1025 PM CDT WED JUL 29 1992

...THUNDERSTORMS CONTINUE IN CENTRAL ILLINOIS...

A LINE OF THUNDERSTORMS...SOME PRODUCING VERY HEAVY RAIN AND FREQUENT
LIGHTNING...EXTENDED FROM ABOUT MARSEILLES TO THE PEORIA VICINITY TO
ABOUT BEARDSTOWN AT 1020 PM. OTHER THUNDERSTORMS WERE SCATTERED FROM
15 MILES SOUTHEAST TO 15 MILES NORTHWEST OF BLOOMINGTON. THE STRONGEST
STORMS EXTENDED FROM MORTON...10 MILES EAST OF PEORIA...TO 25 MILES
SOUTH-SOUTHWEST OF PEORIA.

THE THUNDERSTORMS WERE MOVING EAST AROUND 35 MPH AND ARE EXPECTED TO BE
EAST OF THE ILLINOIS RIVER BY 1100 PM.

THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFENCT FOR MUCH OF WESTERN
AND CENTRAL ILLINOIS HAS BEEN CANCELLED FOR OUR ENTIRE AREA.
                                                               MILLER
Special weather statement, Jul 29, 11:23 PM CDT, 1 hour 17 minutes before
ILZ005>007-009-300515-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
1120 PM CDT WED JUL 29 1992

...THUNDERSTORMS MOVING OUT OF CENTRAL ILLINOIS...

A LINE OF THUNDERSTORMS...SOME PRODUCING VERY HEAVY RAIN...FREQUENT
LIGHTNING...AND BRIEF GUSTY WINDS WERE IN MCLEAN COUNTY ALONG AND EAST
OF I-55 AT 1115 PM. THESE THUNDERSTORMS WERE MOVING EAST AROUND 35 MPH
AND WILL MOVE OUT OF MCLEAN COUNTY INTO EAST CENTRAL ILLINOIS AROUND
MIDNIGHT.

OTHER SHOWERS AND THUNDERSTORMS WERE IN EXTREME NORTHWEST ILLINOIS
AND SOUTHEAST IOWA FROM THE QUAD CITIES TO ABOUT BURLINGTON. THESE
THUNDERSTORMS WERE MOVING EAST-SOUTHEAST AROUND 35 MPH AND ARE EXPECTED
TO APPROACH MONMOUTH AROUND MIDNIGHT. IF THE STORMS REMAIN INTACT THEY
WILL MOVE TOWARD GALESBURG AROUND 1230 AM. THESE STORMS WILL BE CAPABLE
OF PRODUCING HEAVY DOWNPOURS...FREQUENT LIGHTNING...AND GUSTY WINDS AS
THEY MOVE THROUGH WESTERN ILLINOIS.

MILLER
Special weather statement, Jul 30, 12:09 AM CDT, 31 minutes before
ILZ009-010-300600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD IL
1203 AM CDT THU JUL 30 1992

...STRONG THUNDERSTORMS OVER CENTRAL AND EAST CENTRAL ILLINOIS...

AT MIDNIGHT...RADAR INDICATED A 20 MILE WIDE LINE OF VERY STRONG
THUNDERSTORMS EXTENDED FROM 20 MILES EAST OF SPRINGFIELD TO 40 MILES
NORTH OF CHAMPAIGN.  THE STORMS WERE MOVING TO THE SOUTHEAST AT 30 MPH.

THE STRONGEST STORMS WERE LOCATED FROM JUST WEST OF MAROA...14 MILES
NORTH OF DECATUR TO MT AUBURN...18 MILES WEST SOUTHWEST OF DECATUR.
LOCALLY HEAVY RAIN...SMALL HAIL...GUSTY WINDS AND FREQUENT DANGEROUS
LIGHTNING MAY ACCOMPANY THESE STORMS.

SKIES WILL REMAIN PARTLY TO MOSTLY CLOUDY OVERNIGHT WITH SHOWERSx AND
THUNDERSTORMS POSSIBLE.  LOW TEMPERATURES WILL BE IN THE MID TO UPPER
60S.

BE ALERT TO THE RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR
FURTHER UPDATES.

BYRD
Special weather statement, Jul 30, 12:26 AM CDT, 14 minutes before
ILZ005>007-009-300630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
1225 PM CDT THU JUL 30 1992

...STRONG THUNDERSTORMS MOVING ACROSS WESTERN ILLINOIS...

SCATTERED THUNDERSTORMS...SOME STRONG WITH HEAVY DOWNPOURS AND FREQUENT
LIGHTNING...WERE IN WESTERN ILLINOIS FROM ABOUT BURLINGTON TO 30 MILES
NORTHWEST OF PEORIA TO 45 MILES EAST OF MOLINE AT 1220 AM. THE STRONGEST
STORM WAS NEAR GALESBURG.

OTHER SHOWERS AND THUNDERSHOWERS WERE DEVELOPING IN CENTRAL ILLINOIS
10 MILES WEST OF BLOOMINGTON AND EAST OF I-55 IN MCLEAN COUNTY.

ALL OF THE SHOWERS AND STORMS WERE MOVING EAST AROUND 35 MPH. THE STORMS
IN WESTERN ILLINOIS ARE EXPECTED TO EXTEND FROM MONMOUTH THROUGH GALESBURG
TO ABOUT PRINCEVILLE BETWEEN 100 AND 130 AM. THE THUNDERSHOWERS IN
CENTRAL ILLINOIS WILL MOVE EAST OF MCLEAN COUNTY BY 130 AM...UNLESS
ADDTIONAL RAINFALL DEVELOPS.

MILLER
Special weather statement, Jul 30, 12:29 AM CDT, 11 minutes before
ILZ005>007-009-300630-

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE PEORIA IL
1225 AM CDT THU JUL 30 1992

...STRONG THUNDERSTORMS MOVING ACROSS WESTERN ILLINOIS...

SCATTERED THUNDERSTORMS...SOME STRONG WITH HEAVY DOWNPOURS AND FREQUENT
LIGHTNING...WERE IN WESTERN ILLINOIS FROM ABOUT BURLINGTON TO 30 MILES
NORTHWEST OF PEORIA TO 45 MILES EAST OF MOLINE AT 1220 AM. THE STRONGEST
STORM WAS NEAR GALESBURG.

OTHER SHOWERS AND THUNDERSHOWERS WERE DEVELOPING IN CENTRAL ILLINOIS
10 MILES WEST OF BLOOMINGTON AND EAST OF I-55 IN MCLEAN COUNTY.

ALL OF THE SHOWERS AND STORMS WERE MOVING EAST AROUND 35 MPH. THE STORMS
IN WESTERN ILLINOIS ARE EXPECTED TO EXTEND FROM MONMOUTH THROUGH GALESBURG
TO ABOUT PRINCEVILLE BETWEEN 100 AND 130 AM. THE THUNDERSHOWERS IN
CENTRAL ILLINOIS WILL MOVE EAST OF MCLEAN COUNTY BY 130 AM...UNLESS
ADDTIONAL RAINFALL DEVELOPS.

MILLER
/CORRECTION TO TIME OF DAY IN HEADER FROM PM TO AM/

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 10:56 PM CDTSevere Thunderstorm WarningILXLogan, Menard49 min
Jul 29, 11:39 PM CDTSevere Thunderstorm WarningILXSangamon41 min
Jul 29, 11:39 PM CDTSevere Thunderstorm WarningILXChristian, Macon51 min
Jul 30, 1:20 AM CDTSevere Thunderstorm WarningILXDouglas, Moultrie, Piatt25 min
Jul 30, 1:20 AM CDTSevere Thunderstorm WarningILXColes25 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1992Every severe thunderstorm warning in 1992

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.