Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 24, NWS Milwaukee, WI

May 28, 1998Jefferson County, Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 28, 1998, 9:22 PM CDT for Jefferson County, Rock County, Wisconsin. It was in force for 53 min. 3 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 28, 1998, 9:22 PM CDT (02:22 UTC)
Expired: May 28, 1998, 10:15 PM CDT
In force: 53 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Jefferson County, WI, Rock County, WI

The radar

The Milwaukee radar (KMKX), 33 km from the middle of the area, began a volume at 02:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where
May 28, 9:30 PM CDT	Thunderstorm Wind	Janesville, WI
May 28, 9:35 PM CDT	Thunderstorm Wind	Jefferson, WI
May 28, 9:45 PM CDT	Thunderstorm Wind 55	Sullivan, 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 28, 6:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.4 hours before the alert went out and 188 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: 2333 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1689 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 290221 RRA
SVRMKE
WIC055-105-290315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
922 PM CDT THU MAY 28 1998

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

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

* UNTIL 1015 PM CDT

* AT 917 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM NEAR LAKE MILLS IN
  JEFFERSON COUNTY TO NEAR JANESVILLE IN ROCK COUNTY...MOVING EAST
  AT 25 MPH.

* THE LINE OF SEVERE THUNDERSTORMS WILL EXTEND FROM
  NEAR...JEFFERSON AND FORT ATKINSON IN JEFFERSON COUNTY AND MILTON
  AND WHITEWATER IN ROCK COUNTY BY 930 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.

JH/TZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:43 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	62 min
May 28, 7:58 PM CDT	Severe Thunderstorm Warning	MKX	Sauk	52 min
May 28, 8:13 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette	62 min
May 28, 8:27 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green	63 min
May 28, 9:27 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Fond du Lac	63 min
May 28, 9:45 PM CDT	Severe Thunderstorm Warning	MKX	Walworth, Waukesha	60 min
May 28, 9:58 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Racine	62 min
May 28, 9:58 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha	62 min
May 28, 10:03 PM CDT	Severe Thunderstorm Warning	MKX	Sheboygan	57 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; radar from the NEXRAD Level II archive.