A line of thunderstorms moved across north-central Wisconsin during the early morning hours of August 3rd. These storms produced some wind damage in Thorp (Clark County) where a camper was flipped and trees were snapped or uprooted.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
A line of thunderstorms moved across north-central Wisconsin during the early morning hours of August 3rd. These storms produced some wind damage in Thorp (Clark County) where a camper was flipped and trees were snapped or uprooted.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Aug 2, 9:15 PM CST, 4 hours 17 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 1015 PM CDT Tue Aug 2 2022 .DISCUSSION...(This evening through Tuesday) Issued at 234 PM CDT Tue Aug 2 2022 Key Messages: - Rain chances tonight into Wednesday - Low confidence rain chances over the weekend into early next week Tonight and Wednesday... A shortwave trough and surface cold front will move southeast toward Interstate 90 tonight and through the remainder of the area this afternoon. MLCAPES will climb into the 2500 to 3000 J/kg range and then gradually wane late tonight and remain low on Wednesday morning into the 1000 to 1500 J/kg range. On Wednesday afternoon, they will be mainly in the 1000 to 2000 J/kg range. There will be steep 8 to 8.5 C/km mid-level lapse rates through the early evening and then wane overnight. The 02.12z models are in generally agreement that the 700 mb temperatures will warm into the 10 to 15C this evening and then gradually cool to around 9C by late tonight. This cap will greatly limit any surface instability through the early tonight and then any convection will gradually become surface based on Wednesday morning. The CAMs continue to differ on their timing and location of showers and storms for much of tonight. The ARW is by far the most robust with its convection this evening. It develops scattered storms over east-central Minnesota and then develops a line which moves through north-central Wisconsin by mid to late evening. The only over model that has some convection this evening is the FV3, but its convection is far weaker and gets as far south as the Interstate 90 corridor. Considering the strength of the cap and the weak forcing, leaned toward keeping the area mainly dry for this evening. If convection did happen to develop, the shear looks to be in the 15 to 30 knot range, so not that impressed with the severe chances. On Wednesday, there is a much better signal for showers and storms especially during the morning. This is due to the better forcing being located over the region due to the shortwave trough. These storms look to be surface-based, but by the time this occurs the better shear looks to be east and south of the area, so the severe threat continues to look less. Overall, the CAMs have better agreement that some convection will be over the region, so have the highest rain chances during the morning and then gradually decrease them in the afternoon. Friday night into early next week... For the early part of the medium range, the models remain consistent in showing the upper level ridge re-establishing itself over the Desert Southwest with the ridge axis extending up into the Upper Midwest. A upper level low/trough is expected to slide east across central Canada with the southern end of the trough riding up and over the ridge axis. The embedded short wave trough in the end of the long wave trough will have a positive tilt to it as it tracks along the Canadian border but will help to push a cold front into the area that will become the focus for showers and storms starting Friday night. However, from that point forward, the new 02.12Z GFS really starts to diverge away from the 02.00Z ECMWF and cluster analysis as it brings in another system from the Pacific northwest Friday night and then tracks it east along the International border with a positive tilt through the weekend. The ECMWF would suggest a period of rising heights behind the passage of the first short wave trough starting Saturday night before the next system moves by well to the north with just some weak troughing coming through Monday. These differences will have a difference on when rain chances will be included in the forecast. The ECMWF solution would suggest the initial rain chances should end Saturday night/early Sunday before returning for Monday/Monday night with the second system. The GFS solution does not allow the front that comes in Friday night/Saturday to clear the area and keeps the rain chances going all weekend into Monday night. With the influence of the GFS on the NBM, expect there will be some rain chances for the entire weekend into early next week. && .AVIATION...(For the 06Z TAFS through 06Z Wednesday night) Issued at 1011 PM CDT Tue Aug 2 2022 Scattered showers and thunderstorms will persist from late tonight into early this afternoon, with the main threat area shifting from northwest to southeast during this time. Expect some localized restrictions in the heavier storms, but did not explicitly mention anything in the TAFs given the low confidence in timing/location. LLWS is expected to persist through late tonight at the terminals before lessening. Winds steadily back from S/SSW to NW by the afternoon with a few gusts over 20 kts in the afternoon. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && DISCUSSION...Boyne/04 AVIATION...Skow
Hazardous Weather Outlook National Weather Service La Crosse WI 358 AM CDT Tue Aug 2 2022 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-031000- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston- Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau- Adams-Vernon-Crawford-Richland-Grant- 358 AM CDT Tue Aug 2 2022 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight Scattered storms are possible tonight. A few could be strong north of Interstate 94 with hail and strong wind gusts the main threats. Very warm today with afternoon heat indices in the 90s to near 100 degrees. .DAYS TWO THROUGH SEVEN...Wednesday through Monday More storms are possible this weekend. It's too early to discern if there would be a severe risk. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. Rieck
The La Crosse radar (KARX), 130 km away, was scanning. The volume nearest the first event began at 07:30 UTC.
1 thunderstorm wind. Local standard time, as filed.
In Thorp, a camper was flipped over and several trees were snapped or uprooted.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2022Every state in 2022This day in weather historyWarnings in Wisconsin, August 2022
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1050643.