Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 37, NWS Milwaukee, WI

June 21, 1997Ozaukee County, Sheboygan County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jun 21, 1997, 2:32 AM CDT for Ozaukee County, Sheboygan County, Wisconsin. It was in force for 48 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
Jun 21, 1997, 2:32 AM CDT (07:32 UTC)
Expired
Jun 21, 1997, 3:20 AM CDT
In force
48 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Ozaukee County, WI, Sheboygan County, WI

The radar

The Milwaukee radar (KMKX), 89 km from the middle of the area, began a volume at 07:34 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.

IssuedProductOfficeLasted
Jun 21, 2:15 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 7.5 hours before the alert went out and 102 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3468 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3468 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
1.6
Supercell composite
9.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 210732 RRA
SVRMKE
WIC089-117-210820-

BULLETIN - IMMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
232 AM CDT SAT JUN 21 1997

* SEVERE THUNDERSTORM WARNING FOR
  NORTHERN OZAUKEE COUNTY - SOUTHEASTERN WISCONSIN
  SOUTHERN SHEBOYGAN COUNTY - EAST CENTRAL WISCONSIN

* UNTIL 320 AM CDT
 
* THIS STORM IS EXPECTED TO AFFECT
  BELGIUM
  CEDAR GROVE

* AT 228 AM CDT...DOPPLER RADAR AT SULLIVAN INDICATED A SEVERE
  THUNDERSTORM 13 MILES SOUTH SOUTHWEST OF  SHEBOYGAN OR IN THE
  VICINITY OF  BELGIUM MOVING EAST SOUTHEAST AT 25 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 HUSE
TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL
THE STORM HAS PASSED.

GARCIA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 3:01 AM CDTFlash Flood WarningMKXMilwaukee119 min
Jun 21, 3:10 AM CDTSevere Thunderstorm WarningMKXIowa, Lafayette65 min
Jun 21, 3:55 AM CDTSevere Thunderstorm WarningMKXDane, Green55 min
Jun 21, 4:16 AM CDTFlash Flood WarningMKXDodge, Washington119 min
Jun 21, 4:16 AM CDTFlash Flood WarningMKXOzaukee119 min
Jun 21, 4:53 AM CDTSevere Thunderstorm WarningMKXDane, Jefferson62 min
Jun 21, 5:53 AM CDTSevere Thunderstorm WarningMKXLafayette62 min
Jun 21, 6:55 AM CDTSevere Thunderstorm WarningMKXGreen60 min
Jun 21, 7:32 AM CDTSevere Thunderstorm WarningMKXRock, Walworth63 min
Jun 21, 7:40 AM CDTFlash Flood WarningMKXMilwaukee, Waukesha2 hr
Jun 21, 4:54 PM CDTFlash Flood WarningMKXWaukesha4 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1997Every 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.