- December 15 California, Eastern States, Idaho, Nevada
- December 1 Colorado, New Mexico, Utah, Wyoming
- November 3 Arizona, Nevada, Montana
- October 20 California, Idaho
- October 6 Colorado Nevada, New Mexico, and Utah
- September 22 Arizona, Montana, Oregon
- September 8 California, Utah
- August 25 New Mexico, Washington
- August 11 Idaho, Montana, Wyoming
- July 28 Alaska, California, Colorado
- July 14 Utah, Wyoming
- June 30 Arizona, Colorado, Montana
- June 16 California, Idaho
- June 2 Oregon, Utah, Wyoming
- May 19 Arizona, Nevada
- May 5 Colorado, Montana
- April 21 New Mexico, Washington, Wyoming
- April 7 Idaho, Utah
- March 24 Eastern States, Nevada, Wyoming
- March 10 Alaska, Montana
- February 24 Arizona, Colorado, Oregon
- February 10 Idaho, Nevada, New Mexico
- January 27 Alaska, California, Colorado, South Dakota, Utah
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