NWS Duluth Virtual Winter Spotter Training - Attend a live winter weather class this fall!

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Winter Skywarn Spotter Training

Returning for 2025 is our special winter spotter course! This class covers winter weather science, the winter 2025-2026 outlook, how to measure and report winter weather to NWS, the new cold headlines for 2024-2025, and many resource available to stay up-to-date on the forecast. If you are unable to attend one of our live classes, you are welcome to watch the recording of last year's class below. All the content is the same aside from the winter outlook. You do NOT need to be an official spotter for our office to attend - classes are free and open to all. This presentation focuses on northeast Minnesota and northwest Wisconsin, but those outside our region are also welcome to watch, too. Registration is required for the virtual classes and the link can be found by clicking on the calendar entry below. No registration is required for the in-person class.

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

Winter Skywarn Spotter Training

2025 Winter Skywarn Spotter Training Schedule

Handout & Links