Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 70, NWS Milwaukee, WI

July 25, 1997Dane County, Dodge County, Jefferson County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 25, 1997, 7:21 PM CDT for Dane County, Dodge County, Jefferson County, Wisconsin. It was in force for 54 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: Jul 25, 1997, 7:21 PM CDT (00:21 UTC)
Expired: Jul 25, 1997, 8:15 PM CDT
In force: 54 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Dane County, WI, Dodge County, WI, Jefferson County, WI

The radar

The Milwaukee radar (KMKX), 40 km from the middle of the area, began a volume at 00:20 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
Jul 25, 7:24 PM CDT	Thunderstorm Wind	Cambridge, WI
Jul 25, 7:38 PM CDT	Tornado F1	Waunakee, WI
Jul 25, 7:50 PM CDT	Thunderstorm Wind	Busseyville, WI
Jul 25, 8:05 PM CDT	Thunderstorm Wind	Madison, WI
Jul 25, 8:22 PM CDT	Tornado F1	Waunakee, 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.4 hours before the alert went out and 162 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: 738 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 193 m²/s²
0-3 km storm-relative helicity: 246 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 260021 RRA
SVRMKE
WIC025-027-055-260115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
721 PM CDT FRI JUL 25 1997

* SEVERE THUNDERSTORM WARNING FOR
  DANE COUNTY - SOUTH CENTRAL WISCONSIN
  SOUTHERN DODGE COUNTY - SOUTHEASTERN WISCONSIN
  JEFFERSON COUNTY - SOUTHEASTERN WISCONSIN

* UNTIL 815 PM CDT
 
* AT 715 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  CLUSTER OF SEVERE THUNDERSTORMS 12 MILES NORTHEAST OF MADISON NEAR
  SUN PRAIRIE AND NEAR MARXVILLE...17 MILES NORTHWEST OF MADISON.
  THE STORMS WERE MOVING EAST SOUTHEAST AT 20 MPH.

  SOME CITIES AFFECTED WAUNAKEE..WATERLOO...LAKE MILLS AND
  REESEVILLE.

THIS IS A DANGEROUS STORM. 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.

TZ/JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:31 PM CDT	Tornado Warning	MKX	Dane, Jefferson	29 min
Jul 25, 8:01 PM CDT	Tornado Warning	MKX	Dane, Jefferson	34 min
Jul 25, 8:21 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Sheboygan, Washington	59 min
Jul 25, 8:28 PM CDT	Tornado Warning	MKX	Dane, Jefferson	32 min
Jul 25, 8:57 PM CDT	Tornado Warning	MKX	Dane, Dodge, Jefferson	63 min
Jul 25, 9:17 PM CDT	Flash Flood Warning	MKX	Dane, Jefferson	3 hr
Jul 25, 11:11 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Washington	49 min
Jul 26, 3:50 PM CDT	Severe Thunderstorm Warning	MKX	Sauk	40 min
Jul 26, 4:10 PM CDT	Severe Thunderstorm Warning	MKX	Columbia	65 min
Jul 26, 4:33 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	57 min
Jul 26, 5:03 PM CDT	Severe Thunderstorm Warning	MKX	Dodge	57 min
Jul 26, 5:27 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	63 min
Jul 26, 5:35 PM CDT	Severe Thunderstorm Warning	MKX	Walworth	55 min
Jul 26, 5:41 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine	64 min
Jul 26, 5:41 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington	64 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.