Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 100, NWS Milwaukee, WI

September 16, 1997Sauk County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 16, 1997, 8:00 PM CDT for Sauk County, Wisconsin. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 16, 1997, 8:00 PM CDT (01:00 UTC)
Expired: Sep 16, 1997, 9:00 PM CDT
In force: 60 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

County Sauk County, WI

The radar

The La Crosse radar (KARX), 109 km from the middle of the area, began a volume at 01:00 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 16, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.0 hours before the alert went out and 189 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: 418 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 170100 RRA
SVRMKE
WIC021-047-077-111-170200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
800 PM CDT TUE SEP 16 1997

* SEVERE THUNDERSTORM WARNING FOR
  COLUMBIA COUNTY - SOUTH CENTRAL WISCONSIN
  GREEN LAKE COUNTY - CENTRAL WISCONSIN
  MARQUETTE COUNTY - CENTRAL WISCONSIN
  SAUK COUNTY - SOUTH CENTRAL WISCONSIN

* UNTIL 900 PM CDT
 
* SOME LOCATIONS AFFECTED
  MONTELLO
  GREEN LAKE
  BARABOO
  PORTAGE

* AT 800 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
  OF SEVERE THUNDERSTORMS EXTENDING FROM WAUTOMA TO REEDSBURG. THE
  LINE OF STORMS WAS MOVING EAST AT 30 MPH.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATzH YOU SHOULD MOVE
INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. THIS LINE OF
STORMS HAS BLOWN A ROOF OFF A HOUSE IN MAUSTON...AND KNOCKED DOWN
NUMEROUS TREES AND POWER LINES.

HELMAN/MEADE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 16, 7:17 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Sauk	43 min
Sep 16, 7:30 PM CDT	Severe Thunderstorm Warning	MKX	Green	45 min
Sep 16, 7:36 PM CDT	Severe Thunderstorm Warning	MKX	Dane	54 min
Sep 16, 7:44 PM CDT	Severe Thunderstorm Warning	MKX	Rock	61 min
Sep 16, 8:00 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette	60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.