Alert archive / Illinois / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 7, NWS Quad Cities, IA

April 10, 1992Rock Island County, Illinois; Scott County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 10, 1992, 9:21 PM CDT for Rock Island County, Illinois; Scott County, Iowa. It was in force for 19 min.

The area

The counties it named.

The facts

Issued
Apr 10, 1992, 9:21 PM CDT (02:21 UTC)
Expired
Apr 10, 1992, 9:40 PM CDT
In force
19 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Scott County, IA, Rock Island County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.4 hours before the alert went out and 384 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 00:00Z on 1992-04-11Temperature 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 00:00Z on 1992-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 460 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
NaN m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
460 m²/s²
0-3 km storm-relative helicity
848 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, Apr 10, 5:56 PM CDT, 3 hours 25 minutes before
IAZ008-ILZ001-110000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
556 PM CDT FRI APR 10 1992

...TORNADO WATCH FOR MOST OF THE TRI-STATES UNTIL 1000 PM CDT...

AT 555 PM CDT RADAR WAS INDICATING STRONG THUNDERSTORMS OVER WESTERN
DUBUQUE AND NORTHERN JONES COUNTY NEAR FARLEY...20 MILES WEST OF THE
CITY OF DUBUQUE...EXTENDING SOUTH TO NEAR MONTICELLO...30 MILES
SOUTHWEST OF DUBUQUE.  THIS STORM WAS MOVING TO THE EAST AROUND 30 MILES
AN HOUR.

IN ADDITION...A SEVERE THUNDERSTORM WAS LOCATED IN BUCHANAN COUNTY AND
WILL BE MOVING INTO WESTERN DELAWARE COUNTY AFTER 615 PM CDT.

IF YOU ARE IN THE PATH OF THESE STORMS...TAKE COVER IMMEDIATELY.  THE
STORMS MAY PRODUCE HAIL...DEADLY LIGHTNING...AND TORNADOES WITH LITTLE
ADVANCED NOTICE.

IRELAND

NNNN
Special weather statement, Apr 10, 6:43 PM CDT, 2 hours 38 minutes before
ILZ004-IAZ015-110100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
635 PM CDT FRI APR 10 1992

...TORNADO WATCH IN EFFECT FOR ALL OF THE BISTATE REGION UNTIL
10 PM CDT...

AT 630 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS APPROACHING CEDAR
COUNTY IOWA.  THE LINE OF THUNDERSTORMS WAS 15 MILES NORTHWEST OF
TIPTON IOWA AND CLARENCE IOWA...BOTH COMMUNITIES IN CEDAR COUNTY.
TIPTON AND CLARENCE IOWA CAN EXPECT THUNDERSTORMS TO ENTER THEIR
COMMUNITIES BETWEEN 645 AND 730 PM.  STRONG WINDS...HAIL...HEAVY RAIN
AND DANGEROUS LIGHTNING CAN BE EXPECTED WITH THE ARRIVAL OF THESE
THUNDERSTORMS.

OTHER STRONG TO SEVERE THUNDERSTORMS WERE LOCATED NORTH OF CLINTON
COUNTY IOWA.  THESE STORMS WERE MOVING EAST AT 40 MILES AN HOUR AND ARE
EXPECTED TO MISS CLINTON COUNTY AT THIS TIME.
ALL OF THESE THUNDERSTORMS WERE PART OF A LARGE LINE OF THUNDERSTORMS
EXTENDING ACROSS IOWA.  MOST OF THESE STRONG AND SEVERE STORMS WERE
STILL 50 MILES WEST THROUGH NORTH WEST OF THE QUAD CITIES.

IF YOU LIVE NEAR ANY OF THESE THUNDERSTORMS...BE PREPARED FOR
RAPIDLY CHANGING CONDITIONS.  IF SEVERE...THREATENING...WEATHER
APPROACHES WHERE YOU LIVE...BE PREPARED TO SEEK A PLACE OF SAFETY.

MEYER
=
Special weather statement, Apr 10, 6:44 PM CDT, 2 hours 37 minutes before
IAZ008-ILZ001-110045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
644 PM CDT FRI APR 10 1992

...SEVERE THUNDERSTORM WARNING FOR DELAWARE COUNTY HAS BEEN CANCELLED...

AT 640 PM CDT RADAR AND SURFACE REPORTS INDICATED THAT ALL THE SEVERE
WEATHER HAD MOVED OUT OF DELAWARE COUNTY.

AT SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN DUBUQUE
AND ALL OF JONES COUNTIES UNTIL 700 PM CDT.

A TORNADO WATCH ALSO REMAINS IF EFFECT FOR MOST OF THE TRI-STATE AREA
UNTIL 1000 PM CDT.  IF YOU ARE IN THE PATH OF THESE STORMS TAKE COVER
UNTIL THEY PASS.

IRELAND

NNNN
Local storm report, Apr 10, 7:22 PM CDT, 1 hour 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
715 PM CDT FRI APR 10 1992

TIME         REPORT AND LOCATION

615 PM       PEA SIZE HAIL IN CASCADE...DUBUQUE COUNTY
625 PM       3/4 INCH HAIL IN RYAN...DELAWARE COUNTY
638 PM       1/2 TO 3/4 INCH HAIL IN MARTELLE AND MORLEY...JONES COUNTY
653 PM       1/2 TO 3/4 INCH HAIL NORTHEAST OF OLIN...JONES COUNTY
705 PM       PEAL SIZE HAIL IN BALDWIN...JACKSON COUNTY

KOWALSKI/IRELANDI
Special weather statement, Apr 10, 8:10 PM CDT, 1 hour 11 minutes before
IAZ008-ILZ001-WIZ018-110215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
810 PM CDT FRI APR 10 1992

...TORNADO WATCH REMAINS IF AFFECT FOR ALL OF THE TRI-STATE
AREA...EXCEPT FOR GRANT AND LAFAYETTE COUNTIES...UNTIL 1000 PM CDT...

AT 805 PM CDT RADAR WAS INDICATING A THUNDERSTORM OVER NORTHWEST
DELAWARE COUNTY NEAR THORPE...40 MILES WEST NORTHWEST OF DUBUQUE.  THIS
STORM MAY PRODUCE SMALL HAIL AS IT MOVES TO THE EAST SOUTHEAST AT 35
MILES AN HOUR.  OTHER SHOWERS WERE LOCATED OVER SOUTHERN JACKSON COUNTY
IN IOWA AND OVER JO DAVIESS COUNTY IN ILLINOIS.  THESE SHOWERS WERE ALSO
MOVING TO THE EAST SOUTHEAST AROUND 35 MILES AN HOUR.

NO SEVERE WEATHER IS OCCURRING AT THIS TIME...HOWEVER THE POTENTIAL
STILL EXISTS AND PEOPLE IN THE TRI-STATES SHOULD STILL REMAIN ALERT FOR
THE POSSIBILITY OF SEVERE WEATHER.  IF SEVERE WEATHER IS SIGHTED...TAKE
COVER IMMEDIATELY.

IRELAND

NNNN
Special weather statement, Apr 10, 8:57 PM CDT, 24 minutes before
IAZ008-ILZ001-WIZ018-110300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
857 PM CDT FRI APR 10 1992

...TORNADO WATCH FOR THE TRI-STATES HAS BEEN CANCELLED...

AT 855 PM CDT RADAR WAS INDICATING A LINE OF THUNDERSTORMS FROM
DARLINGTON IN LAFAYETTE COUNTY...30 MILES NORTHEAST OF DUBUQUE...TO NEAR
THE CITY OF DUBUQUE.  THESE STORMS MAY PRODUCE BRIEF PERIODS OF HEAVY
RAIN AND SMALL HAIL AS THEY MOVE EAST SOUTHEAST AROUND 30 MILES AN HOUR.
OTHER SHOWES WERE INDICATED OVER DELAWARE...JONES AND JACKSON COUNTIES
IN IOWA.  THESE SHOWERS WERE ALSO MOVING TO THE EAST SOUTHEAST AROUND 30
MILES AN HOUR.

SEVERE WEATHER IS NO LONGER EXPECTED IN THE TRI-STATES...HOWEVER IF
THREATENING WEATHER DOES APPROACH...TAKE SHELTER UNTIL THE STORMS PASS.

IRELAND

NNNN

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 7:30 PM CDTSevere Thunderstorm WarningDVNCedar60 min
Apr 10, 8:26 PM CDTSevere Thunderstorm WarningDVNClinton, Scott64 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1992Severe Thunderstorm Warnings in Iowa, 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.