Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 102, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 19, 1997, 1:09 PM CDT for Rock County, Walworth County, Wisconsin. It was in force for 46 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
- Sep 19, 1997, 1:09 PM CDT (18:09 UTC)
- Expired
- Sep 19, 1997, 1:55 PM CDT
- In force
- 46 min
- Issued by
- NWS Milwaukee, WI
- Area
- Whole counties
Counties Rock County, WI, Walworth County, WI
The radar
The Milwaukee radar (KMKX), 39 km from the middle of the area, began a volume at 18:09 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 19, 1:20 PM CDT | Thunderstorm Wind | Clinton, WI | |
| Sep 19, 1:30 PM CDT | Thunderstorm Wind | Sharon, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 19, 11:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 6.2 hours before the alert went out and 182 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.
- Mixed-layer CAPE
- 1652 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 825 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 366 m²/s²
- 0-3 km storm-relative helicity
- 366 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 18.7
The text
As transmitted, in the capitals the NWS used until 2016.
980 WUUS1 KMKE 191808 RRA SVRMKE WIC105-127-191855- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 109 PM CDT FRI SEP 19 1997 * SEVERE THUNDERSTORM WARNING FOR EASTERN ROCK COUNTY - SOUTH CENTRAL WISCONSIN WALWORTH COUNTY - SOUTHEASTERN WISCONSIN * UNTIL 155 PM CDT * SOME LOCATIONS AFFECTED CLINTON AVALON DELAVAN WALWORTH * AT 105 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS JANESVILLE TO CLINTON. THIS LINE OF STORMS WAS MOVING EAST AT 45 MPH. POWER LINES WERE DOWNED IN BELOIT. * THESE STORMS WILL BE NEAR WALWORTH AND DELAVAN BY 130 PM CDT. THE MAIN THREAT FROM THESE STORMS IS DAMAGING WINDS. DO NOT GO OUTDOORS. KAPELA/JH
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Sep 19, 11:22 AM CDT, 1 hour 47 minutes before
WIZ046-047-051-052-056>060-062>072-200600- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1130 AM CDT FRI SEP 19 1997 ...SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON...NO RISK TONIGHT SOUTH CENTRAL AND SOUTHEAST WISCONSIN... THREAT... DAMAGING WINDS...POSSIBLY LARGE HAIL DISCUSSION... SEVERE THUNDERSTORMS MAY DEVELOP IN THE MOIST AND UNSTABLE AIRMASS OVER THE FAR SOUTH CENTRAL AND SOUTHEAST. SURFACE DEWPOINTS IN THE LOWER 70S...STRONG SURFACE COLD FRONT APPROACHING AND MID LEVEL TROUGH WILL COMBINE TO BRING STRONG TO SEVERE THUNDERSTORMS TO SOUTHERN WISCONSIN. SPOTTER ACTIVATION... STORM SPOTTER GROUPS HAVE BEEN ACTIVATED DUE TO THE SEVERE THUNDERSTO`RM WATCH IN EFFECT UNTIL 4 PM FOR THE FAR SOUTH. DAVIS
Special weather statement, Sep 19, 11:30 AM CDT, 1 hour 39 minutes before
WIZ046-047-051-052-056>060-062>072-200600- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1130 AM CDT FRI SEP 19 1997 ...SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON...NO RISK TONIGHT SOUTH CENTRAL AND SOUTHEAST WISCONSIN... THREAT... DAMAGING WINDS...POSSIBLY LARGE HAIL DISCUSSION... SEVERE THUNDERSTORMS MAY DEVELOP IN THE MOIST AND UNSTABLE AIRMASS OVER THE FAR SOUTH CENTRAL AND SOUTHEAST. SURFACE DEWPOINTS IN THE LOWER 70S...STRONG SURFACE COLD FRONT APPROACHING AND MID LEVEL TROUGH WILL COMBINE TO BRING STRONG TO SEVERE THUNDERSTORMS TO SOUTHERN WISCONSIN. SPOTTER ACTIVATION... STORM SPOTTER GROUPS HAVE BEEN ACTIVATED DUE TO THE SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 4 PM FOR THE FAR SOUTH. DAVIS
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 7:44 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan, Washington | 46 min |
| Sep 19, 6:14 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 61 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.