Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 35, NWS Milwaukee, WI

May 31, 1998Dodge County, Fond du Lac County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 31, 1998, 1:46 AM CDT for Dodge County, Fond du Lac County, Wisconsin. It was in force for 89 min. 2 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: May 31, 1998, 1:46 AM CDT (06:46 UTC)
Expired: May 31, 1998, 3:15 AM CDT
In force: 89 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Dodge County, WI, Fond du Lac County, WI

What was reported inside it

Time	Report	Where	Remark
May 31, 2:15 AM CDT	Thunderstorm Wind 111	Countywide, WI
May 31, 2:15 AM CDT	Thunderstorm Wind 72	Countywide, 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.

Issued	Product	Office	Lasted
May 31, 1:00 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.8 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

000 
TTAA00 KMKE 310646 RRA
SVRMKE
WIC027-039-310815-

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

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

* SEVERE THUNDERSTORM WARNING FOR...
  DODGE COUNTY IN SOUTHEASTERN WISCONSIN
  FOND DU LAC COUNTY IN EAST CENTRAL WISCONSIN

* UNTIL 315 AM CDT

* AT 145 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM
  NESHKORO IN MARQUETTE COUNTY TO BARABOO IN SAUK COUNTY... MOVING
  EAST AT 50 MPH.

* THIS LINE OF SEVERE THUNDERSTORMS WILL PRODUCE WINDS TO 80 MPH
  AND POTENTIALLY WIDESPREAD DAMAGE ACROSS FOND DU LAC AND DODGE
  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.

Issued	Product	Office	Counties	Lasted
May 31, 1:01 AM CDT	Severe Thunderstorm Warning	MKX	Sauk	89 min
May 31, 1:10 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette	80 min
May 31, 1:15 AM CDT	Severe Thunderstorm Warning	MKX	Iowa	90 min
May 31, 1:28 AM CDT	Severe Thunderstorm Warning	MKX	Dane	92 min
May 31, 1:28 AM CDT	Severe Thunderstorm Warning	MKX	Lafayette	92 min
May 31, 1:50 AM CDT	Severe Thunderstorm Warning	MKX	Green	70 min
May 31, 1:57 AM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Rock	78 min
May 31, 2:15 AM CDT	Severe Thunderstorm Warning	MKX	Sheboygan, Washington	75 min
May 31, 2:15 AM CDT	Severe Thunderstorm Warning	MKX	Waukesha	75 min
May 31, 2:27 AM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee	78 min
May 31, 2:27 AM CDT	Severe Thunderstorm Warning	MKX	Walworth	78 min
May 31, 2:42 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine	93 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1998 Every 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.