Alert archive / Wisconsin / Tornado Warnings in 1990

Tornado Warning 12, NWS Quad Cities, IA

June 13, 1990Grant County, Wisconsin; Clayton County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jun 13, 1990, 6:56 PM CDT for Grant County, Wisconsin; Clayton County, Iowa. It was in force for 34 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1990, 6:56 PM CDT (23:56 UTC)
Expired
Jun 13, 1990, 7:30 PM CDT
In force
34 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Clayton County, IA, Grant County, WI

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, 11.9 hours before the alert went out and 296 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°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

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 tornado 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, Jun 13, 4:46 PM CDT, 2 hours 10 minutes before
IAZ008-132230-

SPECIAL WEATHER STATEMENT AND UPDATE FOR DUBUQUE AND VICINITY
NATIONAL WEATHER SERVICE DUBUQUE IA
435 PM CDT WED JUN 13 1990

...TORNADO WATCH IN EFFECT FOR THE IOWA COUNTIES OF DUBUQUE...JACKSON
...JONES...DELAWARE...CLAYTON...UNTIL 1100 PM CDT TONIGHT...

AT 430 PM SKIES WERE PARTLY TO MOSTLY CLOUDY AROUND THE TRI-STATE
WITH WINDS FROM THE SOUTHEAST AT 10 TO 20 MILES AN HOUR...NO
PRECIPITATION WAS BEING INDICATED BY RADAR IN THE TRI-STATE AREA.

AN INTENSE THUNDERSTORM WAS LOCATED ALONG THE IOWA BORDER 30 MILES
SOUTHWEST OF OTTUMWA PROBABLY PRODUCING HEAVY RAIN AND SMALL HAIL...
THUNDERSTORMS LOCATED IN NORTHERN MISSOURI WILL BE MOVING INTO
SOUTH CENTRAL AND SOUTHEAST IOWAo BY 500 PM.

SHOWERS AND THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 35 MILES
AN HOUR.
DEROY
Special weather statement, Jun 13, 5:29 PM CDT, 1 hour 27 minutes before
IAZ015-132330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
525 PM CDT WED JUN 13 1990

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 11 PM CDT TONIGHT...

AT 520 PM CDT SCATTERED STRONG THUNDERSTORMS WERE MOVING INTO
EXTREME SOUTHEAST IOWA.  THE STRONGEST THUNDERSTORM WAS IN THE
SOUTHWEST CORNER OF LEE COUNTY IA...ABOUT 30 MILES SOUTHWEST OF
BURLINGTON IA.

THIS THUNDERSTORMS WAS MOVING TOWARD THE EAST AT 30 MPH.  PERSONS
IN THE P8ATH OF THIS STORM SHOULD BE ON THE ALERT FOR HIGH GUSTY
WINDS ALONG WITH HEAVY RAINFALL AND SOME HAIL.

THIS THUNDERSTORM SHOULD REACH THE FORT MADISON AREA BETWEEN
6 AND 615 PM CDT.

KRAEMER
Special weather statement, Jun 13, 6:06 PM CDT, 50 minutes before
IAZ008-WIZ018-ILZ001-140200-

SPECIAL WEATHER STATEMENT AND UPDATE FOR DUBUQUE AND VICINITY
NATIONAL WEATHER SERVICE DUBUQUE IA
606 PM CDT WED JUN 13 1990

...TORNADO WATCH UNTIL 11 PM...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR DUBUQUE...
JONES...JACKSON...DELAWARE...AND CLAYTON COUNTIES IN NORTHEAST
IOWA.

AT 600 PM CDT WEATHER RADAR INDICATED A FEW SHOWERS AND THUNDERSTORMS
IN CLAYTON COUNTY NEAR ELCADER OR 45 MILES NORTHWEST OF DUBUQUE.
THE SHOWERS AND THUNDERSTORMS WERE MOVINT NORTHEAST AT 15 MILES AN
HOUR. NO SEVERE WEATHER WAS ASSOCIATED WITH THESE STORMS.

OTHERWISE SKIES WERE PARTLY SUNNY OVER THE TRI-STATE. TEMPERATURES
WERE IN THE LOWER 80S. WIND WAS SOUTH AROUND 10 MILES AN HOUR.

THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE TRI-STATE THROUGH 900 P.M.
SOME COULD BECOME SEVERE WITH DAMAGING WIND...LARGE HAIL...DEADLY
LIGHTNING...AND VERY HEAVY DOWNPOURS. SOME FLOODING OF STREETS AND
LOW AREAS IS ALSO POSSIBLE.

PERSONS IN THE TRI-STATE SHOULD REMAIN ALERT FOR THREATNING WEATHER
AND SEEK INDOOR...UNDERGROUND SHELTER SHOULD A THUNDERSTORM OR A
TORNADO APPROACH YOUR LOCATION.

PLEASE MONITOR YOUR LOCAL RADIO AND T.V. STATIONS OR THIS WEATHER
RADIO STATION FOR LATEST UPDATES ON THIS POTENTIALLY DANGEROUS
WEATHER EVENT.

COUCH
Special weather statement, Jun 13, 6:35 PM CDT, 21 minutes before
IAZ015-ILZ004-140045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
635 PM CDT WED JUN 13 1990

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 11 PM CDT TONIGHT...

THUNDERSTORMS CONTINUED TO RUMBLE ACROSS THE BISTATE REGION THIS
EVENING.

AT 630 PM CDT A LINE OF INTENSE THUNDERSTORMS PRODUCING HEAVY RAIN...
GUSTY WINDS AND SOME HAIL WAS LOCATED FROM 25 MILES SOUTHWEST OF MOLINE
ILLINOIS TO 10 MILES EAST OF BURLINGTON IOWA.  THIS LINE OF THUNDERSTORMS
WAS MOVING EAST AT 30 MILES AN HOUR.

A REPORT OF SMALL HAIL...HEAVY RAIN AND GUSTY WIND WAS REPOSTED NEAR
FORT MADISON IOWA AT 615 PM CDT.

IF YOU LIVE NEAR ANY OF THE INTENSE THUNDERSTORMS...BE PREPARED FOR
RAPIDLY CHANGING WrEATHER CONDITIONS AND AND SEEK SHELTER IF NECESSARY.

Nearby

Tornado Warnings in Wisconsin, 1990Tornado Warnings in Iowa, 1990Every tornado warning in 1990Tornadoes 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.