Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 210, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 1997, 6:09 PM CDT for Pepin 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
- Aug 23, 1997, 6:09 PM CDT (23:09 UTC)
- Expired
- Aug 23, 1997, 6:55 PM CDT
- In force
- 46 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Pepin County, WI
The radar
The La Crosse radar (KARX), 106 km from the middle of the area, began a volume at 23:17 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 23, 6:15 PM CDT | Hail 1.75 | Durand, WI | |
| Aug 23, 6:15 PM CDT | Hail 1.75 | Durand, 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 |
|---|---|---|---|
| Aug 23, 5:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 122 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 800 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 320 m²/s²
- 0-3 km storm-relative helicity
- 381 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMSP 232310 RRA
SVRMSP
WIC091-232355-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
609 PM CDT SAT AUG 23 1997
* SEVERE THUNDERSTORM WARNING FOR
EASTERN PEPIN COUNTY - WEST CENTRAL WISCONSIN
* UNTIL 655 PM CDT
* SOME LOCATIONS AFFECTED
DURAND
ARKANSAW
RURAL AREAS EAST OF DURAND
* AT 610 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
HAIL AND DAMAGING WINDS NEAR ROCK FALLS OR ABOUT 13 MILES WEST
OF EAU CLAIRE. THE STORM WAS MOVING SOUTH TO SOUTHEAST AT 35 MPH.
DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.
A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.
MBKThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 4:56 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn | 49 min |
| Aug 23, 5:27 PM CDT | Severe Thunderstorm Warning | MPX | Dunn | 63 min |
| Aug 23, 6:13 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 42 min |
| Aug 23, 6:31 PM CDT | Severe Thunderstorm Warning | MPX | Dunn | 44 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.