Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 101, NWS Milwaukee, WI

September 18, 1997Fond du Lac County, Sheboygan County, Washington County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 18, 1997, 7:44 PM CDT for Fond du Lac County, Sheboygan County, Washington County, Wisconsin. It was in force for 46 min. 1 report 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: Sep 18, 1997, 7:44 PM CDT (00:44 UTC)
Expired: Sep 18, 1997, 8:30 PM CDT
In force: 46 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Fond du Lac County, WI, Sheboygan County, WI, Washington County, WI

The radar

The Milwaukee radar (KMKX), 79 km from the middle of the area, began a volume at 00:46 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
Sep 18, 8:05 PM CDT	Thunderstorm Wind	Taycheedah, 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

Davenport, (KDVN), launched 00:00Z, 0.7 hours before the alert went out and 293 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: 28 J/kg
Mixed-layer CIN: -310 J/kg
Mixed-layer LCL: 1613 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 391 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

004 
WUUS1 KMKE 190044
SVRMKE
WIC039-117-131-190130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
744 PM CDT THU SEP 18 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHEASTERN FOND DU LAC COUNTY - EAST CENTRAL WISCONSIN
  SHEBOYGAN COUNTY - EAST CENTRAL WISCONSIN
  NORTHERN WASHINGTON COUNTY - SOUTHEASTERN WISCONSIN

* UNTIL 830 PM CDT
 
* SOME LOCATIONS AFFECTED
  CAMBELLSPORT
  KEWASKUM
  WEST BEND
  RANDOM LAKE

* AT 843 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM BETWEEN FOND DU LAC AND MAYVILLE. THE STORM
  WAS MOVING EAST AT 40 MPH.

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.


MEADE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 1:09 PM CDT	Severe Thunderstorm Warning	MKX	Rock, Walworth	46 min
Sep 19, 6:14 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	61 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.