A quick moving clipper system brought a narrow band of heavy snow to portions of north-central Wisconsin throughout the day on November 29. Snowfall totals of 6 to 7 inches were recorded over portions of the region.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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 GRB wrote it up.
A quick moving clipper system brought a narrow band of heavy snow to portions of north-central Wisconsin throughout the day on November 29. Snowfall totals of 6 to 7 inches were recorded over portions of the region.
Some of the higher snowfall totals included 7.0 inches near Mountain (northern Oconto Co.), 6.8 inches in Crandon (Forest Co.), and 6.5 inches in Eagle River (Vilas Co.).
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 Green Bay, WI wrote its last area forecast discussion before the first event at Nov 29, 6:31 AM CST, 1 hour 29 minutes earlier.
Area Forecast Discussion National Weather Service Green Bay WI 631 AM CST Mon Nov 29 2021 Updated aviation portion for 12Z TAF issuance .SHORT TERM...Today...Tonight...and Tuesday Issued at 402 AM CST Mon Nov 29 2021 All eyes will be on the fast moving clipper system that will bring snow to parts of the area today. Quiet weather is forecast for most of the area later tonight and Tuesday. Temps will be near today then slightly above normal tonight and Tuesday. Today...another day...another clipper to impact the area. Still some differences in the models, quite drastic in some locations (especially across central and east central WI), even as we approach the onset of snow. For example, snow plumes for Green Bay are from a trace to 5". Typical culprits causing the differences including dry air, track, and placement of best FGEN. Plenty of dry air to overcome at the onset, but a pretty quick saturation process is expected across northern WI, especially after 13-14z, but will take longer farther south. Some flurries look to occur during the saturation process. GFS/ECMWF/FV3 continue to show the band of heaviest snow stretching from Lincoln/Oneida counties to Manitowoc/Kewaunee counties. With the other guidance farther north toward the MI border. Will lean toward the farther north models for the forecast as the high- resolution models (HRRR/RAP/ARW) should have a better handle on things. Looking upstream, not much to speak of in the way of precip making it to the surface other than a flurry or sprinkle, which puts the farther south and higher QPF models in question already. But dynamics look impressive as isentropic lift increases this morning, FGEN sets up over northern WI, and steep mid-level lapse rates arrive. Expect a moderate to possibly heavy band of snow to set up. The strongest FGEN band should show its hand by 15-18z. Currently have it over far northeast WI, but if it does happen to set up farther south, snow totals will have to be increased from parts of central WI into the northern Fox Valley. The DGZ is over 11K feet and rather shallow, plus the best lift doesn't occur within the DGZ for long, so think any heavy snow would be in a narrow band and would be fairly brief. In fact, this system will be a pretty quick hitter, which will help limit totals. In general and if the track holds, looking at a 1-3" north of a Merrill to Green Bay line, with some locally higher amounts where the FGEN persists the longest. While some 3+ inch totals are possible, will not issue a headline as confidence is not there on location, winds will remain fairly light and temps will be in the upper 20s to around 30, limiting impacts. Where the snow is lighter and temps are warmer, snow might have trouble accumulating as it will fall during the daytime. A pretty sharp cut off in the snow is likely occur over the south due to the dry air and weaker FGEN. Some mixing could occur in central WI where a warm nose will punch in, but the precip looks to be very light. Some rain could mix in near Lake Michigan as well. The precip looks to end as a period of freezing drizzle for some, especially over the far north and east. Highs will be around 30 near the MI border and likely near 40 in Wood Co. Tonight...any lingering light snow or freezing drizzle will by around 03z as the surface low and shortwave exit to our east and drier air arrives. Skies look to clear out for most spots during the evening hours, with some lingering clouds over far north central WI. Northwest winds will be a little gusty through the night, up to around 20 mph. Lows should mainly be in the 20s, but some teens will be possible. Tuesday...a quiet day is expected across the area as northwest flow continues across the area and weak surface ridging builds toward the western Great Lakes. A shortwave will clip the far north, but only expecting some clouds from this feature. Lake effect activity will stay mainly across Upper Michigan as trajectories are a little too westerly and dry air moves in through the day, but a few flurries or snow showers could cross into far northern WI, especially before noon. High cloud will increase in the afternoon. Northwest winds will gust up to 30 mph. Highs look to be in the mid 30s to low 40s. .LONG TERM...Tuesday Night Through Sunday Issued at 402 AM CST Mon Nov 29 2021 At the start of the forecast period expect continued ridging across the western CONUS and a trough across the east. This creates a progressive west to northwesterly flow pattern into the western Great Lakes through Thursday, then transitions to zonal flow across the CONUS Friday and Saturday, and then amplifying again by the end of the weekend. This will lead to multiple shortwaves coming through late in the week, each of which could bring light precip to all or parts of the forecast area. However, confidence in exact timing and location is low due to high model variability and consistency. Current consensus shows Wednesday and Friday as the most likely days to get light precipitation. Temperatures on Wednesday will warm into the 40s for most locations, so while ptype may start as snow, do not expect more than a few tenths before transitioning to rain for the rest of the day. Low level winds turn northwest behind this wave which could bring some LES or drizzle to far north- central WI through Thursday. A similar shortwave/clipper comes through on Friday. Temps will be cooler by the end of the week making snow the dominate ptype, with some rain possible near the lake shore counties. Once again, some lake effect snow may carry into Saturday for far north- central WI. With flow becoming southwesterly by the end of the weekend northeast WI may be able to tap into more substantial moisture ahead of a weather system moving east from the Plains. But this is still uncertain. Will continue to watch Sunday and early next week to see how this system evolves. There is higher confidence that temperatures will run about 5 to 10 degrees above normal through the end of the work weak, peaking on Wednesday and Thursday, then settle closer to normal values this weekend. && .AVIATION...for 12Z TAF Issuance Issued at 631 AM CST Mon Nov 29 2021 A fast moving clipper system will bring light to moderate snow today. Lowest CIGs and VSBYs will be at RHI and GRB, closest to the heaviest snow band. Conditions will drop into the MVFR/IFR flight conditions as the snow moves through. Brief LIFR conditions are possible in the heaviest snow. The snow will taper off from southwest to northeast during the afternoon and early evening, with partial clearing occurring in the south part of the forecast area this evening. A period of freezing drizzle is possible as the snow ends. Some rain could mix in at MTW as well. South winds are expected ahead of the clipper with a few gusts up to 20 kts possible, then will shift to the northwest tonight. A period of LLWS is possible overnight into early Tuesday as northwest winds increase aloft before mixing to the surface. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM.....Bersch LONG TERM......KLJ AVIATION.......Bersch
Hazardous Weather Outlook National Weather Service Green Bay WI 436 AM CST Mon Nov 29 2021 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-301045- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 436 AM CST Mon Nov 29 2021 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Today and Tonight Light to moderate snow will create hazardous travel conditions at times today across much of northeast Wisconsin. The highest snow amounts will be across north central and northeast Wisconsin with the lowest totals in central Wisconsin. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Light snow is possible on Wednesday morning before any snow transitions to rain. .SPOTTER INFORMATION STATEMENT... Spotters are requested to forward snowfall measurements to the National Weather Service in Green Bay. LMZ521-522-541>543-301045- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 436 AM CST Mon Nov 29 2021 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Today and Tonight The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The probability for widespread hazardous weather is low. Bersch/KLJ
Special Weather Statement National Weather Service Green Bay WI 637 AM CST Mon Nov 29 2021 WIZ005-010>013-018>022-030-031-037>040-049-050-073-074-291545- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Waupaca-Outagamie-Brown-Kewaunee-Calumet-Manitowoc- Southern Marinette County-Southern Oconto County- 637 AM CST Mon Nov 29 2021 ...ACCUMULATING SNOW WILL BRING HAZARDOUS TRAVEL CONDITIONS TODAY... Light to moderate snow will overspread the area this morning as a clipper low pressure system arrives. The snow should begin during the morning commute in north central and parts of central Wisconsin, then spread into northeast and east central Wisconsin by early afternoon. The snow may mix with rain at times near Lake Michigan. The precipitation will taper off from southwest to northeast during the afternoon and early evening. Accumulations between a half inch and 3 inches are expected for most locations, with the higher totals over far northeast Wisconsin. Hazardous travel conditions are anticipated due to snow covered roads and reduced visibilities. The worst conditions are anticipated north of Highway 29. If traveling, slow down, keep extra distance between vehicles, allow extra time to reach your destination and be prepared for rapidly changing road conditions. Bersch
The national radar mosaic for the moment the first event began.
3 heavy snow. Local standard time, as filed.
The highest snowfall total in northern Oconto County was 7.0 inches near Mountain.
The highest snowfall total in Vilas County included 6.5 was in Eagle River.
The highest snowfall total in Forest County was 6.8 inches in Crandon.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2021Every state in 2021This day in weather historyWarnings in Wisconsin, November 2021
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: 989346, 989347, 989350.