Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 39, NWS Green Bay, WI

September 15, 1990Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Sep 15, 1990, 7:57 PM CDT for Manitowoc County, Wisconsin. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Sep 15, 1990, 7:57 PM CDT (00:57 UTC)
Expired
Sep 15, 1990, 8:30 PM CDT
In force
33 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Manitowoc 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 00:00Z, 1.0 hours before the alert went out and 54 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 1990-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 706 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 00:00Z on 1990-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
706 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
902 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGRB 160057
SVRGRB
WIC071-160130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING 
NATIONAL WEATHER SERVICE GREEN BAY WI
757 PM CDT SAT SEP 15 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 830 PM CDT FOR 
PEOPLE IN THE FOLLOWING COUNTY

   IN THE EAST CENTRAL PART OF WISCONSIN
      NORTHERN MANITOWOC

...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTY JUST MENTIONED

AT 755 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER NORTHERN
MANITOWOC COUNTY ABOUT 5 MILES NORTHWEST OF THE CITY OF MANITOWOC.
THIS STORM IS MOVING TO THE SOUTHEAST AT 30 MILES AN HOUR AND WILL
BE OVER THE LAKE SHORE BETWEEN TWO RIVERS AND MANITOWOC AT 815 PM.
BOATERS ON LAKE MICHIGAN NEAR MANITOWOC SHOULD HEAD FOR PORT AT
ONCE.

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND NEAR WINDOWS.  DO NOT USE T\ELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED.  MOTORISTS
SHOULD AVOID LOW WATER CROSSINGS.

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, Sep 15, 6:07 PM CDT, 1 hour 50 minutes before
WIZ-005-008-009-012-013-141400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
6 PM CDT SAT SEP 15 1990

AT 545 PM CDT RADAR INDICATED A STRONG THUNDERSTORM JUST TO THE NORTHWEST
OF SHAWANO IN SHAWANO COUNTY.  THIS THUNDERSTORM IS PRODUCING HEAVY RAIN.
AND COULD PRODUCE STRONG GUSTY WIND..HAIL AND DAMAGING LIGHTNING.
THIS THUNDERSTORM IS EXSPECTED TO BE IN THE CITY  OF SHAWANO BY 615 PM
CDT.   THIS THUNDERSTORM IS MOVING TO THE SOUTHEAST AT 35 MPH.
NO SEVERE WEATHER HAS BEEN REPORTED SO FAR.
RCM
Special weather statement, Sep 15, 6:40 PM CDT, 1 hour 17 minutes before
WIZ-008-160030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
640 PM CDT SAT SEP 15 1990

AT 635 PM CDT WEATHER RADAR INDICATED A STRONG THUNDERSTORM BETWEEN
PULASKI AND GREEN BAY IN EXTREME NORTHWEST BROWN COUNTY.  THIS STORM
WILL LIKELY CONTAIN HEAVY SHOWERS...GUSTY WINDS...DANGEROUS LIGHTNING...
AND POSSIBLY SMALL HAIL.  MOVEMENT IS TO THE SOUTHEAST AT AROUND 35
MILES AN HOUR AND WILL BE IN THE GREEN BAY AREA BY 700 PM CDT.

BOATERS ON THE SOUTH END OF THE BAY OF GREEN BAY SHOULD BE ALERT
FOR THUNDERSTORMS AND HEAD FOR PORT AT ONCE IF THESE THUNDERSTORMS
APPROACH.

NO SEVERE WEATHER HAS BEEN REPORTED AS OF 640 PM.
DC

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.