Atmospheric Rivers

Cases

Cases were identified from the CW3E Atmospheric River event archive, the Global Atmospheric Rivers Dataverse (UCLA), and the peer-reviewed papers listed. Bounding boxes are oriented along the AR axis and sized to contain the integrated vapour transport (IVT) corridor from offshore to the landfall region, with approximately 10° margins on each side of the IVT axis. For non-western-US cases (Middle East, Australia, Antarctica, Europe), boxes were drawn to enclose the full moisture band, validated via ERA5 IVT fields.

Data used to select the ARs comes from:

• Atmospheric Rivers in the Northwest | USDA Climate Hubs
• https://cw3e.ucsd.edu/category/atmospheric-rivers/
• Back-to-back high category atmospheric river landfalls occur more often on the west coast of the United States | Communications Earth & Environment
• Atmospheric rivers that make landfall in India are associated with flooding | Communications Earth & Environment
• Global Application of the Atmospheric River Scale - Guan - 2023 - Journal of Geophysical Research
• Global Atmospheric Rivers Dataverse
• Atmospheric Rivers in the Eastern and Midwestern United States Associated With Baroclinic Waves
• Atmospheric River Tracking Method Intercomparison Project (ARTMIP) | Climate & Global Dynamics
• Using Deep Learning for an Analysis of Atmospheric Rivers in a High‐Resolution Large Ensemble Climate Data Set
• European West Coast atmospheric rivers: A scale to characterize strength and impacts - ScienceDirect
• Atmospheric rivers are shifting poleward, reshaping global weather patterns
• Deep Learning Image Segmentation for Atmospheric Rivers in

Western US & Canada

1. Nov 18-21 2024 Bomb Cyclone and AR
2. Bomb cyclone with atmospheric river blasts Oregon, Northern California and Washington
3. CW3E AR Update: 18 November 2024 Outlook - Center for Western Weather and Water Extremes
4. Cross-listed with AR and major winds and large-scale snow
5. October 18-20 2024 Alaska and BC Canada
6. CW3E Event Summary: 18-20 October 2024 - Center for Western Weather and Water Extremes
7. https://en.wikipedia.org/wiki/2024_British_Columbia_floods
8. September 22 – 24 2024 Alaska and BC Canada
9. CW3E Event Summary: 22 - 24 September 2024 - Center for Western Weather and Water Extremes
10. February 28 – March 3 2024 Pacific Northwest (mostly snow)
11. https://cw3e.ucsd.edu/cw3e-event-summary-28-february-3-march-2024/
12. Feb 18 - 20 2024 California
13. https://cw3e.ucsd.edu/cw3e-event-summary-18-20-february-2024/
14. February 3-5, 2024
15. Cross-listed with major wind events
16. Atmospheric River impacts California
17. February 2024 California atmospheric rivers - Wikipedia
18. January 26 – February 2 2024 Alaska to California
19. https://cw3e.ucsd.edu/cw3e-event-summary-26-january-2-february-2024/
20. Jan 22 2024 California and Arizona
21. https://cw3e.ucsd.edu/cw3e-event-summary-22-january-2024/
22. March 20-22 2023 California and Arizona
23. CW3E Event Summary: 20-22 March 2023 - Center for Western Weather and Water Extremes
24. March 9-15 2023 California
    1. https://cw3e.ucsd.edu/cw3e-event-summary-9-15-march-2023/
    2. March 2023 North American winter storm - Wikipedia
    3. Cross-listed with AR and winds
25. February 19-26 2023 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-19-26-february-2023/
26. Dec 2022 - January 2023 California
    1. 2022–2023 California floods - Wikipedia
    2. Flooding engulfs Santa Barbara, others areas of Southern California - The Washington Post
    3. https://cw3e.ucsd.edu/cw3e-event-summary-29-december-2022-1-january-2023/
    4. https://confluence.ecmwf.int/display/FCST/202301+-+Rainfall+-+California
27. Dec 26 - 27 2022 California
    1. https://cw3e.ucsd.edu/cw3e-event-summary-26-27-december-2022/
28. Dec 9 12 2022 Oregon and California
    1. https://cw3e.ucsd.edu/cw3e-event-summary-9-12-december-2022/
29. Nov 29 - Dec 5 2022 California
    1. https://cw3e.ucsd.edu/cw3e-event-summary-29-november-5-december-2022/
30. November 7-8 2022 California
    1. https://cw3e.ucsd.edu/cw3e-event-summary-7-8-november-2022/
31. Nov 3-5 2022 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-3-5-november-2022/
32. June 9-12 2022 Pacific Northwest, Wyoming, and Montana
    1. https://cw3e.ucsd.edu/cw3e-event-summary-9-12-june-2022/
33. February 26 - March 2 2022 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-26-february-2-march-2022/
34. January 4 - 7 Colorado
    1. https://cw3e.ucsd.edu/cw3e-extreme-swe-snow-event-summary-4-7-january-2022/
35. January 2 - 8 2022 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-2-8-january-2022/
    2. Snow, rain brings flood concerns, closures; slide cleared, I-84 reopens in Gorge - KTVZ
36. December 22 2021 – January 1 2022 Western US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-22-december-2021-1-january-2022/
    2. https://www.nature.com/articles/s43247-024-01368-w
37. Dec 10 - 14 2021 - Pacific NW
    1. https://cw3e.ucsd.edu/cw3e-event-summary-10-14-december-2021/
    2. 2021 Pacific Northwest floods - Wikipedia
38. November 10-16 2021- Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-10-16-november-2021/
    2. 2021 Pacific Northwest floods - Wikipedia
    3. Atmospheric River Brings Severe Flooding and Landslides to British Columbia | NASA Global Precipitation Measurement Mission
39. Oct 19-26 2021 California
    1. CW3E Event Summary: 19-26 October 2021 - Center for Western Weather and Water Extremes
40. Sep 16 - 19 2021 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-16-19-september-2021/
41. Feb 21 - 23 2021 Pacific Northwest
    1. CW3E Event Summary: 21-23 February 2021 - Center for Western Weather and Water Extremes
42. January 11-13 2021 Pacific NW
    1. https://cw3e.ucsd.edu/cw3e-event-summary-11-13-january-2021/
43. January 2021 1-7 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-1-7-january-2021/
44. Dec 17 - 22 2021 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-17-22-december-2020/
45. December 11-17 2020 Western US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-11-17-december-2020/
46. November 16 - 18 2020 Western US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-16-18-november-2020/
47. September 23-27 2020 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-23-27-september-2020/
48. Sep 14 - 18 2020 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-14-18-september-2020/
49. May 16 - 19 2020 Western US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-16-19-may-2020/
50. March 9 - 13 2020 Southwestern US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-9-13-march-2020/
51. Feb 21 - 23 2020 Southwestern US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-21-23-february-2020/
52. Feb 4 - 8 2020 Western US
    1. https://cw3e.ucsd.edu/cw3e-event-summary-4-8-february-2020/
53. Jan 26 - February 2 2020 Pacific Northwest
    1. https://cw3e.ucsd.edu/cw3e-event-summary-26-january-2-february-2020/

Worldwide events

1. October 3-4 2024 Bosnia
2. 2024 Bosnia and Herzegovina floods - Wikipedia
3. April 4 2024 - eastern Aus flooding
4. Why is Australia’s east coast copping all this rain right now? An atmospheric scientist explains
5. April 14-17 2024 Persian Gulf
6. 2024 Persian Gulf floods - Wikipedia
7. Dec 17 - 18 2023 East Coast
8. Summary of the 17–18 December 2023 East Coast Cyclone and Atmospheric River Event
9. https://www.ncei.noaa.gov/access/monitoring/monthly-report/national/202312
10. June 25-27 2023 Northwest cloudband Australia
11. https://www.abc.net.au/news/2023-06-27/tropical-rain-drenches-central-north-australia/102341464
12. April 2023 Middle East
13. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109446
14. Oct 13 2022 Victoria flooding, Australia
15. https://www.abc.net.au/news/2022-10-13/victoria-flooding-rain-road-closures-safety-warnings-melbourne/101527960
16. Oct 30 2022 Victoria flooding, Australia
17. https://www.vic.gov.au/2022-flood-recovery
18. August 2022, Japan
19. Moisture Sources of the Tohoku Heavy Rainfalls in August 2022 and the Influences of Tropical Storms - Zhao - 2023 - Geophysical Research Letters - Wiley Online Library
20. March 15-19 2022 East Antarctica
    1. The Extraordinary March 2022 East Antarctica “Heat” Wave. Part I: Observations and Meteorological Drivers in
    2. Cross-listed with heat
21. Feb 26-28 2022 Southeast QLD / northern NSW floods Australia
    1. https://en.wikipedia.org/wiki/2022_eastern_Australia_floods
22. Jan 14 - 14 2022 Norway and Sweden
    1. https://confluence.ecmwf.int/display/FCST/202201+-+Rainfall+-+Norway%2CSweden
23. June 18-19 2021 Bloomington Indiana USA
    1. Atmospheric Rivers in the Eastern and Midwestern United States Associated With Baroclinic Waves
24. June 24-26 2021 - Alaska
    1. An anomalous warm-season trans-Pacific atmospheric river linked to the 2021 western North America heat wave | Communications Earth & Environment
25. March 17-24 2021 Sydney heavy rainfall, Australia
    1. https://www.smh.com.au/politics/nsw/la-nina-s-final-fury-20210427-p57mvj.html
26. Dec 1 - 4 2020 Alaska
    1. https://cw3e.ucsd.edu/cw3e-event-summary-01-04-december-2020/
    2. Atmospheric River Impacts Southeast Alaska
27. Oct 2-3 2020 Western Alps
    1. The influence of an atmospheric river on a heavy precipitation event over the western Alps - ScienceDirect