Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 87, NWS Milwaukee, WI

August 3, 1997Fond du Lac County, Green Lake County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 3, 1997, 7:23 PM CDT for Fond du Lac County, Green Lake County, Wisconsin. It was in force for 57 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: Aug 3, 1997, 7:23 PM CDT (00:23 UTC)
Expired: Aug 3, 1997, 8:20 PM CDT
In force: 57 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Fond du Lac County, WI, Green Lake County, WI

The radar

The Milwaukee radar (KMKX), 92 km from the middle of the area, began a volume at 00:27 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	Remark
Aug 3, 7:35 PM CDT	Hail 3	Green Lake, WI
Aug 3, 7:50 PM CDT	Thunderstorm Wind 51	Markesan, 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 95 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: 657 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 040023 RRA
SVRMKE
WIC039-047-040120-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
723 PM CDT SUN AUG 3 1997

* SEVERE THUNDERSTORM WARNING FOR
  WESTERN FOND DU LAC COUNTY - EAST CENTRAL WISCONSIN
  GREEN LAKE COUNTY - CENTRAL WISCONSIN

* UNTIL 820 PM CDT
 
* SOME LOCATIONS AFFECTED
  BERLIN
  GREEN LAKE
  RIPON
  BRANDON

* AT 715 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR THE TOWN OF BERLIN...22 MILES WEST
  OF OSHKOSH.  THE STORM WAS MOVING SOUTH AT 15 MPH.  EXPECT LARGE
  HAIL WITH THIS STORM.

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

MK/TH/NJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 7:01 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	59 min
Aug 3, 8:06 PM CDT	Severe Thunderstorm Warning	MKX	Dodge	54 min
Aug 3, 9:15 PM CDT	Severe Thunderstorm Warning	MKX	Green Lake	60 min
Aug 3, 10:00 PM CDT	Severe Thunderstorm Warning	MKX	Dodge	60 min
Aug 3, 10:02 PM CDT	Severe Thunderstorm Warning	MKX	Racine, Walworth	58 min
Aug 4, 1:13 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	47 min
Aug 4, 1:41 PM CDT	Severe Thunderstorm Warning	MKX	Dane	49 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.