A Pacific storm and atmospheric river will impact the Pacific Northwest states and northern Rockies this weekend, bringing locally heavy low elevations rain and heavy high elevation snow in the mountains. By Sunday over the Interior Northwest, rain combined with snowmelt will increase the risk of flood hazards. Flood Watches are in effect. Read More >
(Click Maps to Enlarge)
Table of Contents:
Winter 2024/2025 Season-to-Date Snowfall Forecast Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2024/2025 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2023/2024 Final Seasonal Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2023/2024 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2022/2023 Final Seasonal Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2022/2023 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2021/2022 Seasonal Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2021/2022 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2020/2021 Final Seasonal Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2020/2021 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
Observed |
Forecast Error |
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Forecast Error |
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Forecast Error |
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Forecast Error |
(Left Graphic is Observed, Right Graphic is Forecast Error)
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(Left Graphic is Observed, Right Graphic is Forecast Error)
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(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2019/2020 Final Seasonal Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2019/2020 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2018/2019 Final Seasonal Errors
(Data in Mountains and Higher Elevations not valid because of lack of reports)
Winter 2018/2019 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2017/2018 Final Seasonal Errors
(Data near Katahdin not valid because of lack of reports)
Winter 2017/2018 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2016/2017 Final Seasonal Errors
(Data near Katahdin not valid because of lack of reports)
Winter 2016/2017 Individual Storm Maps
(Left Graphic is Observed, Right Graphic is Forecast Error)
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Forecast Error |
(Left Graphic is Observed, Right Graphic is Forecast Error)
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(Left Graphic is Observed, Right Graphic is Forecast Error)
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Winter 2015/2016 Individual Storm Maps
Winter 2014/2015 Individual Storm Maps
Winter 2013/2014 Individual Storm Maps
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Winter 2012/2013 Individual Storm Maps