On the morning of Tuesday, November, 10th, a cold front had moved across Minnesota and western Wisconsin. A 500 MB short wave that developed across the central Rockies was moving northeast across Nebraska with an intensifying 850 MB low developing across Iowa Tuesday morning.
Every event with a place to put it; 1 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 MPX wrote it up.
On the morning of Tuesday, November, 10th, a cold front had moved across Minnesota and western Wisconsin. A 500 MB short wave that developed across the central Rockies was moving northeast across Nebraska with an intensifying 850 MB low developing across Iowa Tuesday morning. At the surface, low pressure was across northern Missouri. Initially, the 850 MB low moved northward across Iowa, and stronger warm air advection across eastern Minnesota and western Wisconsin kept the precipitation in the form of sleet, freezing rain, and some snow Tuesday morning. Farther to the west and deeper into the colder air, light snow fell but it was mostly flurries or occasionally 2-4SM in light snow.
A dry slot developed, and moved over eastern Minnesota, while the main storm system moved farther west. Once the upper low moved over southwest Minnesota, a broader area of precipitation started to develop over central Minnesota into west central Wisconsin, where the dendritic growth zone was maximized together with abundant moisture content and lift. Also during the later afternoon, the storm system became more organized as noted with a beautiful comma-shaped upper low moving over Minnesota. This was also where several snow bands started to develop, especially over central Minnesota into west central Wisconsin. where the combination of the intensifying short wave and upper-level jet occurred. At the surface, the low continued to strengthen and move northeast across eastern Iowa, and into northern Wisconsin by late evening. Over the rest of west-central Wisconsin, snowfall amounts of 1 inch or less occurred. Some freezing rain did occur Tuesday morning, and into the afternoon, but only isolated areas received enough to cause problems.
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 Twin Cities, MN wrote its last area forecast discussion before the first event at Nov 10, 9:40 AM CST, 2 hours 20 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Twin Cities/Chanhassen MN 421 AM CST Tue Nov 10 2020 MNZ085-092-093-111030- Steele-Faribault-Freeborn- 421 AM CST Tue Nov 10 2020 This Hazardous Weather Outlook is for portions of south central Minnesota. .DAY ONE...Today and Tonight. An Ice Storm Warning is in effect through this afternoon. Ice accumulations of up to one quarter inch can be expected along with snowfall of one to three inches. Please refer to the Winter Weather Message for additional information. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters and snowfall observers are encouraged to report snowfall amounts to the National Weather Service. MNZ053-060>063-067>070-075-076-083-WIZ014-015-111030- Chisago-Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott- Dakota-Nicollet-Le Sueur-Blue Earth-Polk-Barron- 421 AM CST Tue Nov 10 2020 This Hazardous Weather Outlook is for portions of central Minnesota...east central Minnesota...south central Minnesota and northwest Wisconsin. .DAY ONE...Today and Tonight. A Winter Storm Warning is in effect through this evening. Snowfall accumulations are likely to range between 4 and 7 inches. Please refer to the Winter Weather Message for additional information. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters and snowfall observers are encouraged to report snowfall amounts to the National Weather Service. MNZ043>045-049>052-057>059-064>066-073-074-077-078-082-084-091- WIZ016-023>025-111030- Morrison-Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti- Kandiyohi-Meeker-Wright-Yellow Medicine-Renville-McLeod-Redwood- Brown-Rice-Goodhue-Watonwan-Waseca-Martin-Rusk-St. Croix-Pierce- Dunn- 421 AM CST Tue Nov 10 2020 This Hazardous Weather Outlook is for portions of central and southern Minnesota, and west central Wisconsin. .DAY ONE...Today and Tonight. A Winter Weather Advisory is in effect through this evening. Snowfall accumulations are likely to range between 3 and 5 inches. Please refer to the Winter Weather Message for additional information. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters and snowfall observers are encouraged to report snowfall amounts to the National Weather Service. MNZ041-042-047-048-054>056-WIZ026>028-111030- Douglas-Todd-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-Pepin- Eau Claire- 421 AM CST Tue Nov 10 2020 This Hazardous Weather Outlook is for portions of central Minnesota...west central Minnesota and west central Wisconsin. .DAY ONE...Today and Tonight. Light snow is likely from this afternoon through tonight. Snowfall accumulations of up to 2 inches can be expected. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters and snowfall observers are encouraged to report snowfall amounts to the National Weather Service.
The national radar mosaic for the moment the first event began.
1 winter storm. Local standard time, as filed.
Several trained weather observers and area airports reported a mixture of sleet and light snow Tuesday afternoon. Heavier snowfall began during the late afternoon and evening before ending toward midnight. Snowfall amounts across the far northwest part of the county averaged 5 to 6 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2020Every state in 2020This day in weather historyWarnings in Wisconsin, November 2020
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 2026-10-01. Each event’s entry at NCEI: 921313.