Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Casper Top 29 Snowstorms since 1937

(Through March 2025)

Date	Storm Total Snowfall (Inches)

1. April 3-5, 2023	37.4
2. December 23-24, 1982	31.3
3. April 18-21, 1973	27.9
4. March 13-14, 2021	26.3
5. April 30-May 2, 1946	23.2
6. March 14, 2021	21.2
7. December 1-2, 1982	21.0
8. May 4-7, 1978	18.8
9. October 16-17, 1998	18.7
10. May 2-4, 1950	18.4
11. January 30 - February 2 2016	18.1
12. April 29-May 2, 1973	17.9
13. April 18-20, 1971	17.4
14. October 3-5, 2013	16.4
15. March 17-19, 1954	16.1
15. November 8-13, 1985	16.1
16. May 10-12, 1980	15.7
16. February 3-4, 2020	15.7
17. March 28-30, 1977	15.6
18. November 2-3, 1994	15.4
19. November 7-8, 1983	15.3
20. April 8-10, 2013	15.1
20. April 16-17, 2013	15.1
21. October 19-20, 1949	15.0
22. November 19-21, 1979	14.9
23. February 18-19, 2019	14.7
23. March 13-14, 2019	14.7
23. April 12-17, 1945	14.5
25. November 18-20, 1977	14.4
26. March 1-2, 1952	14.1
27. April 2-3, 1964	14.0
27. January 5-6, 1987	14.0

Last updated 4/11/2025

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Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

Casper Top 25 Snowstorms

Casper Top 29 Snowstorms since 1937