Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 39, NWS Milwaukee, WI

May 31, 1998Waukesha County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 31, 1998, 2:15 AM CDT for Waukesha County, Wisconsin. It was in force for 75 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 31, 1998, 2:15 AM CDT (07:15 UTC)
Expired
May 31, 1998, 3:30 AM CDT
In force
75 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

County Waukesha County, WI

What was reported inside it

TimeReportWhereRemark
May 31, 2:45 AM CDTThunderstorm Wind 70Countywide, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
May 31, 1:00 AM CDTTornado WatchSPC5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 7.3 hours before the alert went out and 163 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 1998-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 450 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 00:00Z on 1998-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 358 square meters per square second.1939587897Sfc1 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
450 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
891 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
358 m²/s²
0-3 km storm-relative helicity
509 m²/s²
Significant tornado parameter
0.9
Supercell composite
9.7

Open this sounding in Storm Lab

The text

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

722 
WUUS1 KMKE 310715 RRA
SVRMKE
WIC117-131-133-310830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
215 AM CDT SUN MAY 31 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  SHEBOYGAN COUNTY IN EAST CENTRAL WISCONSIN
  WASHINGTON COUNTY IN SOUTHEASTERN WISCONSIN
  WAUKESHA COUNTY IN SOUTHEASTERN WISCONSIN

* UNTIL 330 AM CDT

* AT 215 AM NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM RIPON IN
  FOND DU LAC COUNTY TO MADISON IN DANE COUNTY... MOVING EAST AT
  50 MPH.

* THIS LINE OF SEVERE THUNDERSTORMS WILL PRODUCE WINDS TO 80 MPH
  AND SHOULD PRODUCE WIDESPREAD WIND DAMAGE IN
  SHEBOYGAN...WASHINGTON AND WAUKESHA COUNTIES.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
THAT SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES. IF YOU ARE IN THESE AREAS... SEEK SAFETY IN A SMALL
INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST
PROTECTION.

HENTZ/JH
&

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 1:01 AM CDTSevere Thunderstorm WarningMKXSauk89 min
May 31, 1:10 AM CDTSevere Thunderstorm WarningMKXColumbia, Green Lake, Marquette80 min
May 31, 1:15 AM CDTSevere Thunderstorm WarningMKXIowa90 min
May 31, 1:28 AM CDTSevere Thunderstorm WarningMKXDane92 min
May 31, 1:28 AM CDTSevere Thunderstorm WarningMKXLafayette92 min
May 31, 1:46 AM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac89 min
May 31, 1:50 AM CDTSevere Thunderstorm WarningMKXGreen70 min
May 31, 1:57 AM CDTSevere Thunderstorm WarningMKXJefferson, Rock78 min
May 31, 2:15 AM CDTSevere Thunderstorm WarningMKXSheboygan, Washington75 min
May 31, 2:27 AM CDTSevere Thunderstorm WarningMKXMilwaukee, Ozaukee78 min
May 31, 2:27 AM CDTSevere Thunderstorm WarningMKXWalworth78 min
May 31, 2:42 AM CDTSevere Thunderstorm WarningMKXKenosha, Racine93 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.