Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 61, NWS Milwaukee, WI

June 18, 1998Dodge County, Green Lake County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jun 18, 1998, 6:38 PM CDT for Dodge County, Green Lake County, Wisconsin. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 18, 1998, 6:38 PM CDT (23:38 UTC)
Expired
Jun 18, 1998, 7:40 PM CDT
In force
62 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Dodge County, WI, Green Lake County, WI

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 18, 5:15 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.6 hours before the alert went out and 115 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 1998-06-18Temperature 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 12:00Z on 1998-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939Sfc1 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
1347 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
167 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.

350 
WUUS1 KMKE 182337 RRA
SVRMKE
WIC027-047-055-105-190040-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
638 PM CDT THU JUN 18 1998

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN WI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DODGE COUNTY IN SOUTHEASTERN WISCONSIN
  GREEN LAKE COUNTY IN CENTRAL WISCONSIN
  JEFFERSON COUNTY IN SOUTHEASTERN WISCONSIN
  ROCK COUNTY IN SOUTH CENTRAL WISCONSIN

* UNTIL 740 PM CDT

* AT 630 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM MONTELLO TO
  MADISON TO BRODHEAD... MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREEN LAKE AT 700 PM
  BEAVER DAM AT 700 PM
  FORT ATKINSON AT 700 PM
  JANESVILLE AT 700 PM CDT

IF YOU ARE IN THESE AREAS... SEEK SAFETY IN A SMALL INTERIOR ROOM
AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST PROTECTION. SEVERE
THUNDERSTORMS WILL OCCASIONALLY PRODUCE TORNADOES.

HELMAN/DAVIS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 11:42 AM CDTSevere Thunderstorm WarningMKXIowa48 min
Jun 18, 12:40 PM CDTSevere Thunderstorm WarningMKXDane60 min
Jun 18, 1:01 PM CDTSevere Thunderstorm WarningMKXColumbia54 min
Jun 18, 1:04 PM CDTSevere Thunderstorm WarningMKXGreen61 min
Jun 18, 1:15 PM CDTSevere Thunderstorm WarningMKXMarquette60 min
Jun 18, 1:26 PM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac, Green Lake64 min
Jun 18, 3:50 PM CDTSevere Thunderstorm WarningMKXRock60 min
Jun 18, 4:17 PM CDTTornado WarningMKXRock, Walworth33 min
Jun 18, 4:34 PM CDTSevere Thunderstorm WarningMKXJefferson, Walworth, Waukesha61 min
Jun 18, 4:55 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette55 min
Jun 18, 4:55 PM CDTSevere Thunderstorm WarningMKXSauk55 min
Jun 18, 5:00 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine60 min
Jun 18, 5:10 PM CDTSevere Thunderstorm WarningMKXDane, Green60 min
Jun 18, 5:10 PM CDTSevere Thunderstorm WarningMKXColumbia60 min
Jun 18, 5:50 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette, Sauk50 min
Jun 18, 6:02 PM CDTSevere Thunderstorm WarningMKXColumbia, Marquette63 min
Jun 18, 6:02 PM CDTSevere Thunderstorm WarningMKXDane, Green63 min
Jun 18, 6:38 PM CDTSevere Thunderstorm WarningMKXJefferson, Rock62 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1998Every severe thunderstorm warning in 1998

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.