Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 53, NWS Milwaukee, WI

June 18, 1998Iowa County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jun 18, 1998, 4:55 PM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 55 min. 5 reports 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
Jun 18, 1998, 4:55 PM CDT (21:55 UTC)
Expired
Jun 18, 1998, 5:50 PM CDT
In force
55 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Iowa County, WI, Lafayette County, WI

What was reported inside it

TimeReportWhereRemark
Jun 18, 5:30 PM CDTThunderstorm WindBenton, WI
Jun 18, 5:30 PM CDTThunderstorm WindHelena, WI
Jun 18, 5:35 PM CDTThunderstorm WindMontfort Jct, WI
Jun 18, 5:40 PM CDTThunderstorm WindMontfort Jct, WI
Jun 18, 5:55 PM CDTThunderstorm WindClyde, 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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.9 hours before the alert went out and 138 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, Davenport, at 12:00Z on 1998-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2000 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, Davenport, at 12:00Z on 1998-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
2000 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
1205 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
81 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.

548 
WUUS1 KMKE 182153 RRA
SVRMKE
WIC049-065-111-182250-

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

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

* SEVERE THUNDERSTORM WARNING FOR...
  IOWA COUNTY IN SOUTH CENTRAL WISCONSIN
  LAFAYETTE COUNTY IN SOUTH CENTRAL WISCONSIN
  SAUK COUNTY IN SOUTH CENTRAL WISCONSIN

* UNTIL 550 PM CDT

* AT 455 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM LA CROSSE TO
  DUBUQUE IOWA... MOVING NORTHEAST AT 30 MPH.  DAMAGING WINDS TO 70
  TO 80 MPH AND LARGE HAIL ARE POSSIBLE WITH THESE STORMS.

* THE LINE OF SEVERE THUNDERSTORMS WILL EXTEND FROM NEAR...
  REEDSBURG IN SAUK COUNTY TO DARLINGTON IN LAFAYETTE COUNTY
  AT 515 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.
KAPELA

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 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 WarningMKXDodge, Green Lake62 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.