Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 3, NWS Milwaukee, WI

April 5, 1997Dane County, Iowa County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 5, 1997, 4:58 PM CST for Dane County, Iowa County, Wisconsin. It was in force for 77 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: Apr 5, 1997, 4:58 PM CST (22:58 UTC)
Expired: Apr 5, 1997, 6:15 PM CST
In force: 77 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Dane County, WI, Iowa County, WI

The radar

The Milwaukee radar (KMKX), 100 km from the middle of the area, began a volume at 23:00 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
Apr 5, 5:00 PM CST	Thunderstorm Wind	Linden, WI
Apr 5, 5:20 PM CST	Thunderstorm Wind	Arena, WI
Apr 5, 5:25 PM CST	Thunderstorm Wind 50	Verona, WI
Apr 5, 5:35 PM CST	Thunderstorm Wind	Sun Prairie, WI
Apr 5, 5:40 PM CST	Thunderstorm Wind	Stoughton, 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
Apr 5, 4:15 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 515 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 99 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.

382 
WUUS1 KMKE 052257 RRA
SVRMKE
WIC025-049-105-060015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
458 PM CST SAT APR 5 1997

* SEVERE THUNDERSTORM WARNING FOR
  DANE COUNTY - SOUTH CENTRAL WISCONSIN
  IOWA COUNTY - SOUTH CENTRAL WISCONSIN
  ROCK COUNTY - SOUTH CENTRAL WISCONSIN

* UNTIL 615 PM CST
 
* AT 5 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF SEVERE THUNDERSTORMS MOVING INTO SOUTHCENTRAL WISCONSIN. THE
LINE OF STORMS WAS MOVING NORTHEAST AT 50 MPH.

THIS IS A DANGEROUS STORM LINE OF STORMS. IF YOU ARE IN ITS PATH YOU
SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO
NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY
UNTIL THE STORM HAS PASSED.

BROWNING/DAVIS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 4:07 PM CST	Severe Thunderstorm Warning	MKX	Lafayette	53 min
Apr 5, 4:39 PM CST	Severe Thunderstorm Warning	MKX	Green	66 min
Apr 5, 4:58 PM CST	Severe Thunderstorm Warning	MKX	Rock	77 min
Apr 5, 5:16 PM CST	Severe Thunderstorm Warning	MKX	Jefferson, Walworth	74 min
Apr 5, 5:16 PM CST	Severe Thunderstorm Warning	MKX	Columbia, Sauk	74 min
Apr 5, 5:36 PM CST	Severe Thunderstorm Warning	MKX	Dodge, Racine, Waukesha	69 min
Apr 5, 5:36 PM CST	Severe Thunderstorm Warning	MKX	Kenosha	69 min
Apr 5, 5:57 PM CST	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington	63 min
Apr 5, 5:57 PM CST	Severe Thunderstorm Warning	MKX	Green Lake, Marquette	63 min
Apr 5, 5:57 PM CST	Severe Thunderstorm Warning	MKX	Fond du Lac	63 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1997 Every severe thunderstorm warning in 1997

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.