Alert archive / Wisconsin / Tornado Warnings in 1990

Tornado Warning 1, NWS Green Bay, WI

August 18, 1990Adams County, Juneau County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Aug 18, 1990, 5:57 PM CDT for Adams County, Juneau County, Wisconsin. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1990, 5:57 PM CDT (22:57 UTC)
Expired
Aug 18, 1990, 7:00 PM CDT
In force
63 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Adams County, WI, Juneau 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, 11.0 hours before the alert went out and 158 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 1990-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 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, Green Bay/Straub, WI at 12:00Z on 1990-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
19 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
877 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSN 182302 COR
TORMSN
WIC001-057-190000-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MADISON WI...COR TO SPELLING OF CITY
600 PM CDT SAT AUG 18 1990

THE NATIONAL WEATHER SERVICE IN MADISON WIHAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  700 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...

IN SOUTH CENTRAL WISCONSIN
          ...ADAMS...JUNEAU

AT 552PM CDT A POSSIBLE TORNADO WAS REPORTED BY THE PUBLIC IN
NORTHERN JUNEAU COUNTY NEAR MATHER MOVING TOWARDS THE EAST..SOUTHEAST
30 MPH.  SEEK SHELTER IF THIS STORM NEARS.


THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

STIMACH

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 9:10 PM CDTSevere Thunderstorm WarningGRBIowa, Richland, Sauk65 min
Aug 17, 11:15 PM CDTFlash Flood WarningGRBIowa3 hr
Aug 17, 11:58 PM CDTFlash Flood WarningGRBIowa6 hr
Aug 18, 6:23 PM CDTTornado WarningGRBGreen Lake, Marquette, Waushara67 min

Nearby

Tornado Warnings in Wisconsin, 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.