Overview
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A very early season winter storm brought 2 to 6 inches of snow to parts of southeast Minnesota through north-central Wisconsin on October 20. The snow moved into the region by mid to late morning, quickly spreading east through the day before diminishing by early evening. Roads became snow-covered and slippery, especially north of Interstate 90. |
 Radar loop from 10 am to 10 pm on October 20, 2020 |
Snow
Public Information Statement National Weather Service La Crosse WI 908 AM CDT Wed Oct 21 2020 ...SNOWFALL REPORTS FOR OCTOBER 20th... Location Amount Time/Date Lat/Lon ...Minnesota... ...Dodge County... Mantorville 1.9 ESE 3.5 in 0700 AM 10/21 44.05N/92.72W Hayfield 0.3 SSE 3.0 in 0830 AM 10/21 43.89N/92.85W Dodge Center 3.0 in 0803 PM 10/20 44.03N/92.85W Kasson 3.0 in 0442 PM 10/20 44.03N/92.75W Claremont 3.1 S 1.6 in 0700 AM 10/21 44.00N/92.99W ...Fillmore County... Wykoff 3.1 NW 0.7 in 0700 AM 10/21 43.74N/92.31W ...Mower County... Grand Meadow 0.5 in 0600 AM 10/21 43.71N/92.56W Austin 2.4 W 0.2 in 0700 AM 10/21 43.67N/93.02W ...Olmsted County... Rochester 4.7 N 3.9 in 0700 AM 10/21 44.08N/92.48W Elgin 2SSW 3.1 in 0700 AM 10/21 44.10N/92.27W 6 E Douglas 3.1 in 0737 PM 10/20 44.10N/92.46W Rochester 5.7 N 3.1 in 0730 PM 10/20 44.10N/92.46W 2 NE Rochester 3.0 in 0600 AM 10/21 44.04N/92.44W 4 ESE Douglas 3.0 in 0600 PM 10/20 44.08N/92.51W 2 NNW Rochester 2.5 in 0600 AM 10/21 44.05N/92.49W 2 SSE Rochester 2.5 in 0736 PM 10/20 43.99N/92.47W Elba 4.7 SW 2.4 in 0700 PM 10/20 44.04N/92.09W Rochester Intl Airport 2.1 in 0654 AM 10/21 43.90N/92.50W 3 NNW Rochester 2.0 in 0505 PM 10/20 44.06N/92.49W 1 SW Rochester 2.0 in 0502 PM 10/20 44.00N/92.49W ...Wabasha County... Theilman 1 SSW 5.6 in 0730 AM 10/21 44.28N/92.19W 1 NNW Wabasha 4.8 in 0657 PM 10/20 44.38N/92.05W Plainview 4.2 in 1002 PM 10/20 44.16N/92.17W Zumbro Falls 3.5 SSW 3.3 in 0700 AM 10/21 44.24N/92.46W ...Winona County... Stockton 1.2 W 1.1 in 0608 AM 10/21 44.03N/91.79W ...Wisconsin... ...Buffalo County... Mondovi 5.5 in 0650 PM 10/20 44.57N/91.67W ...Clark County... 2 N Dorchester 6.0 in 0810 PM 10/20 45.03N/90.33W Colby 5.9 WSW 6.0 in 0700 PM 10/20 44.87N/90.42W Owen 1E 4.5 in 0700 AM 10/21 44.95N/90.55W ...Jackson County... Black River Falls 1.7 NNE 1.3 in 0700 AM 10/21 44.32N/90.83W Mather 3NW 0.1 in 0700 AM 10/21 44.17N/90.35W ...La Crosse County... Holmen 2 S 0.3 in 0700 AM 10/21 43.93N/91.25W ...Taylor County... Medford 0.8 ENE 4.3 in 0700 AM 10/21 45.14N/90.33W 4 E Hannibal 2.5 in 0525 PM 10/20 45.24N/90.70W ...Trempealeau County... 5 S Osseo 5.0 in 0800 PM 10/20 44.51N/91.22W Ettrick 4.0 WNW 2.2 in 0744 AM 10/21 44.19N/91.34W Galesville 2WSW 0.8 in 0500 AM 10/21 44.07N/91.39W Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official. $$
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| Weather story graphic issued early on October 20 | Graphicast issued during the afternoon on October 20 | Winter Weather Advisories and Winter Storm Warnings valid during the afternoon on October 20 | Caption (source) |
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Snowfall Records:
...RECORD DAILY SNOWFALL AT ROCHESTER MN... AT THE ROCHESTER INTERNATIONAL AIRPORT...2.1 INCHES OF SNOW FELL ON OCTOBER 20TH. THIS SET A NEW RECORD DAILY SNOWFALL. THE PREVIOUS RECORD HAD BEEN 0.5 INCHES SET IN 1982.
Daily Cooperative Snowfall Records (5 PM October 19 to 5 PM October 20)
New Old Records
Location Record Record Began
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Mondovi WI 4.0 inches 3.3 inches - 1992 1908
Daily Cooperative Snowfall Records (7 AM October 20 to 7 AM October 21)
New Old Records
Location Record Record Began
-------- ------ ------ -------
Theilman 1SSW MN 5.6 inches 0.0 inches - 2019 1938
Wabasha MN 5.5 inches 0.0 inches - 2019 1956
Mondovi WI 4.0 inches 3.3 inches - 1992 1908
Elgin 2SSW MN 3.1 inches 0.0 inches - 2019 1940
Alma Dam 4 WI 2.2 inches 0.0 inches - 2019 1936
Rochester AP 2NE MN 2.1 inches 0.0 inches - 2019 2000
Grand Meadow MN 0.5 inches 0.5 inches - 1913 1893
Daily Cooperative Snowfall Records (5 PM October 20 to 5 PM October 21)
New Old Records
Location Record Record Began
-------- ------ ------ -------
Mondovi WI 4.0 inches 1.0 inch - 1992 1908
Snowiest October Day Records for Cooperative Observers...
New Old
Location Record Record
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Theilman 1SSW MN 5.6 inches 4.0 inches - 10/24/2009
Wabasha MN 5.5 inches 3.2 inches - 10/24/2009
Alma Dam 4 WI 2.2 inches 1.0 inch - 10/25/1981
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