A low pressure system that passed through southern Wisconsin brought heavy snow to the northwest part of the state, mixed precipitation across central and northeast Wisconsin, and mainly rain farther to the southeast. Colder air that pushed in behind the storm caused wet roads to become ice-covered during the evening hours.
Every event with a place to put it; 10 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 low pressure system that passed through southern Wisconsin brought heavy snow to the northwest part of the state, mixed precipitation across central and northeast Wisconsin, and mainly rain farther to the southeast. Colder air that pushed in behind the storm caused wet roads to become ice-covered during the evening hours. The highest snowfall amounts were across north-central Wisconsin where 6 to 10 inches fell.
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 Jan 22, 4:18 AM CST, 1 hour 42 minutes earlier.
Area Forecast Discussion National Weather Service Green Bay WI 418 AM CST Mon Jan 22 2018 Forecast discussion for routine morning forecast issuance .SHORT TERM...Today...Tonight...and Tuesday Issued at 417 AM CST Mon Jan 22 2018 Low pressure over southern Iowa will move slowly to the east northeast today as the closed upper low moves east from the central Plains. Precipitation type is not usually a concern when a storm moves along this track, but there is not an arctic high over southern Canada to deliver cold air in the low level this time, so precipitation type will be an issue. Model forecast soundings suggest that it will be cold enough for mostly snow roughly north of a Wausau to Antigo to Wausaukee line, and six to eight inches looks possible. From Wisconsin Rapids to Shawano to Oconto there should be a mixture of snow, sleet, freezing rain and rain with some accumulation. Fox Valley and lakeshore areas will have largely rain based on forecast boundary layer temperatures, but it wouldn't take much cooling to get snow. Temperatures today will only rise three or four degrees due to precipitation and cloud cover. The precipitation will change to all snow before it diminishes tonight. The majority of the snow that falls will be in the evening hours. Lows tonight will remain well above normal. Light snow is likely Tuesday morning in eastern Wisconsin before the system exits the region. Some small accumulation is possible. It will be blustery and colder that today, but still milder than normal. .LONG TERM...Tuesday Night Through Sunday Issued at 417 AM CST Mon Jan 22 2018 Forecast concerns in this portion of the forecast revolve around temperatures, and precipitation potential late this week. The medium range models are in good agreement so a general model blend will suffice. Tuesday night through Wednesday night...Weak shortwave energy will be passing across the region on Tuesday night and Wednesday. Mid and high clouds will be on the increase on Tuesday night with saturation occurring above 700mb. Though this shortwave is disjointed, with low level moisture lagging behind moisture aloft, wouldnt be surprised to see some flurries or light snow fall out these mid-clouds late Tuesday night into Wednesday. The multi-model blend is not optimistic about precip, so will keep the area dry until we get closer to this time period. After the mid-level moisture departs Wednesday afternoon, low clouds will likely move across the area into Wednesday night, and progged soundings indicate that a low overcast deck or fog could stick around through much of the night. Rest of the forecast...Dry weather is anticipated for Thursday and Thursday night as warmer air surges into the region. Clouds will be on the increase on Friday ahead of the next cold front. Some timing/detail differences in the models, but it appears that moisture will be quite limited, so precip chances will be low. If precip does occur, is likely to be rather light, which will limit potential impacts to the region. Colder air will push into the area behind the front for next weekend, with some snow showers possible over northern WI. && .AVIATION...for 06Z TAF Issuance Issued at 1038 PM CST Sun Jan 21 2018 LIFR cigs and vsbys due to fog continue to spread over northeast Wisconsin tonight. The rest of the area still in VFR conditions but will deteriorate later tonight as a winter storm approaches the area. Overnight mainly rain is expected across the Fox Valley/lakeshore and a rain/snow mix across Door county into central Wisconsin. The precipitation is expected to change over to all snow over the rest of the region Monday afternoon into Monday evening as colder air works into the region. && .GRB WATCHES/WARNINGS/ADVISORIES... Dense Fog Advisory until 6 AM CST early this morning for WIZ022- 039-040-048>050. Winter Weather Advisory until midnight CST tonight for WIZ020- 022-031-035>037-074. Winter Storm Warning until midnight CST tonight for WIZ030. Winter Storm Warning until midnight CST tonight for WIZ005- 010>013-018-019-021-073. && SHORT TERM.....RDM LONG TERM......MPC AVIATION.......TDH
Hazardous Weather Outlook National Weather Service Green Bay WI 338 AM CST Mon Jan 22 2018 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-230945- 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- 338 AM CST Mon Jan 22 2018 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...This Afternoon and Tonight Hazardous travel conditions will arrive later today and tonight over much of the region as a winter storm moves along the Wisconsin and Illinois border. Six to eight inches of snow is expected roughly north of a line from Wausau to Antigo to Wausaukee, with a mix of snow, sleet freezing rain and rain further south. Mostly rain is expected in the Fox Valley and lakeshore counties south of Algoma. Light precipitation may produce a few slick roads and sidewalks early this morning, with the heavier precipitation not arriving until midday. Difficult road and air travel conditions are expected during the late afternoon and evening across most places north and west of the Fox Valley. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Light snow could create slippery rods and sidewalks across the Fox Valley and lakeshore Tuesday morning as the storm system exits the area. .SPOTTER INFORMATION STATEMENT... Spotters are requested to report snow and ice accumulations to the National Weather Service in Green Bay. LMZ521-522-541>543-230945- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 338 AM CST Mon Jan 22 2018 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...This Afternoon and Tonight A gale warning is in effect later this morning for northern Lake Michigan and the bay. Northeast winds are expected to gust to 35 to 40 knots this afternoon through tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Northeast winds with gale force gusts to 35 to 40 knots are expected through noon Tuesday. RDM/MPC
Special Weather Statement National Weather Service Green Bay WI 253 AM CST Mon Jan 22 2018 WIZ020>022-030-031-035>040-045-048>050-073-074-221200- Menominee-Northern Oconto County-Door-Marathon-Shawano-Wood- Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 253 AM CST Mon Jan 22 2018 ...SCATTERED SLIPPERY SPOT DEVELOPING ON AREA ROADWAYS THIS MORNING... Scattered light rain showers and drizzle will continue to lift north across central and northeast Wisconsin early this morning. Despite temperatures currently at or just above freezing across the area, slippery spots may develop on area roadways, parking lots, and sidewalks. Motorists are advised to use caution and give yourself extra time to reach your destination this morning. MPC
Special Weather Statement National Weather Service Green Bay WI 540 AM CST Mon Jan 22 2018 WIZ020>022-030-031-035>040-045-048>050-073-074-221445- Menominee-Northern Oconto County-Door-Marathon-Shawano-Wood- Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 540 AM CST Mon Jan 22 2018 ...SCATTERED SLIPPERY SPOTS ON AREA ROADWAYS THIS MORNING... Periods of light rain will continue to lift north across central and northeast Wisconsin this morning. Despite temperatures currently at or just above freezing across the area, slippery spots may develop on area roadways, parking lots, and sidewalks. Motorists are advised to use caution and give yourself extra time to reach your destination this morning. MPC
The national radar mosaic for the moment the first event began.
10 winter storm. Local standard time, as filed.
The highest snowfall totals in Vilas County included 9.5 inches near Land O' Lakes, 9.0 inches 9 miles east-northeast of Boulder Junction, and 8.5 inches at Eagle River.
The highest snowfall totals in Oneida County included 10.7 inches near Mc Naughton, 10.0 inches near Lake Tomahawk, 7.2 inches at Rhinelander, and 6.3 inches at Minocqua.
The highest snowfall totals in Forest County included 7.0 inches at Crandon, 6.6 inches near Argonne, and 6.0 inches near Alvin.
The highest snowfall totals in Florence County included 7.6 inches at Aurora and 6.5 inches 4 miles west of Aurora.
Heavy snow fell in Marinette County.
Heavy snow fell in Marinette County.
Heavy snow fell in northern Oconto County.
The highest snowfall totals in Lincoln County included 8.6 inches at Rice Reservoir, and 7.3 inches 7 miles west of Merrill.
Heavy snow fell in Langlade County.
Heavy snow fell in Marathon County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2018Every state in 2018This day in weather historyWarnings in Wisconsin, January 2018
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: 730425, 734409, 734410, 734411, 734412, 734413, 734414, 734417, 734418, 734419.