| 08:56 PST |  Clear | -11°C / 12°F | -13°C / 9°F | 85% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KWMC 251656Z AUTO 00000KT 10SM CLR M11/M13 A3029 RMK AO2 SLP310 T11061128 |
| 07:56 PST |  Clear | -14°C / 7°F | -16°C / 3°F | 85% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KWMC 251556Z AUTO 00000KT 10SM CLR M14/M16 A3028 RMK AO2 SLP313 T11441161 |
| 06:56 PST |  Clear | -17°C / 1°F | -19°C / -2°F | 85% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KWMC 251456Z AUTO 00000KT 10SM CLR M17/M19 A3028 RMK AO2 SLP309 T11671189 55002 |
| 05:56 PST |  Clear | -16°C / 3°F | -18°C / 0°F | 85% | 1025 mb (30.27 in) | SSE 6 kph (SSE 3.5 mph) | - | 10SM |
| | KWMC 251356Z AUTO 16003KT 10SM CLR M16/M18 A3027 RMK AO2 SLP305 T11611178 |
| 04:56 PST |  Clear | -16°C / 3°F | -18°C / 0°F | 85% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KWMC 251256Z AUTO 00000KT 10SM CLR M16/M18 A3027 RMK AO2 SLP300 T11561183 |
| 03:56 PST |  Clear | -16°C / 3°F | -17°C / 1°F | 92% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KWMC 251156Z AUTO 00000KT 10SM CLR M16/M17 A3028 RMK AO2 SLP302 70001 T11561172 11106 21156 58003 |
| 02:56 PST |  Clear | -14°C / 7°F | -16°C / 3°F | 85% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KWMC 251056Z AUTO 00000KT 10SM CLR M14/M16 A3029 RMK AO2 SLP297 T11391156 |
| 01:56 PST |  Clear | -15°C / 5°F | -16°C / 3°F | 92% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KWMC 250956Z AUTO 00000KT 10SM CLR M15/M16 A3030 RMK AO2 SLP302 T11501161 |
| 00:56 PST |  Clear | -12°C / 10°F | -14°C / 7°F | 85% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KWMC 250856Z AUTO 00000KT 10SM CLR M12/M14 A3030 RMK AO2 SLP298 T11221144 58004 |