| 16:56 PST |  Clear | 2°C / 36°F | -6°C / 21°F | 56% | 1017 mb (30.03 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KWMC 020056Z AUTO 34003KT 10SM CLR 02/M06 A3002 RMK AO2 SLP192 T00221056 |
| 15:56 PST |  Clear | 7°C / 45°F | -5°C / 23°F | 42% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KWMC 012356Z AUTO 00000KT 10SM CLR 07/M05 A3003 RMK AO2 SLP187 T00721050 10083 20000 56007 |
| 14:56 PST |  Clear | 8°C / 46°F | -6°C / 21°F | 37% | 1017 mb (30.03 in) | NW 6 kph (NW 3.5 mph) | - | 10SM |
| | KWMC 012256Z AUTO 30003KT 10SM CLR 08/M06 A3003 RMK AO2 SLP183 T00781056 |
| 13:56 PST |  Clear | 8°C / 46°F | -6°C / 21°F | 37% | 1017 mb (30.03 in) | NW 7 kph (NW 4.6 mph) | - | 10SM |
| | KWMC 012156Z AUTO 31004KT 10SM CLR 08/M06 A3003 RMK AO2 SLP186 T00781056 |
| 12:56 PST |  Clear | 7°C / 45°F | -6°C / 21°F | 39% | 1018 mb (30.06 in) | NW 7 kph (NW 4.6 mph) | - | 10SM |
| | KWMC 012056Z AUTO 32004KT 10SM CLR 07/M06 A3005 RMK AO2 SLP191 T00721056 58017 |
| 11:56 PST |  Clear | 4°C / 39°F | -6°C / 21°F | 48% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KWMC 011956Z AUTO 00000KT 10SM CLR 04/M06 A3007 RMK AO2 SLP203 T00441056 |
| 10:56 PST |  Clear | 3°C / 37°F | -6°C / 21°F | 52% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KWMC 011856Z AUTO 00000KT 10SM CLR 03/M06 A3009 RMK AO2 SLP210 T00281056 |
| 09:56 PST |  Clear | 1°C / 34°F | -6°C / 21°F | 60% | 1020 mb (30.12 in) | ENE 6 kph (ENE 3.5 mph) | - | 10SM |
| | KWMC 011756Z AUTO 06003KT 10SM CLR 01/M06 A3011 RMK AO2 SLP218 T00061061 10006 21122 57003 |
| 08:56 PST |  Clear | -4°C / 25°F | -8°C / 18°F | 74% | 1020 mb (30.12 in) | Calm | - | 10SM |
| | KWMC 011656Z AUTO 00000KT 10SM CLR M04/M08 A3011 RMK AO2 SLP227 T10441083 |
| 07:56 PST |  Clear | -9°C / 16°F | -12°C / 10°F | 79% | 1020 mb (30.12 in) | Calm | - | 10SM |
| | KWMC 011556Z AUTO 00000KT 10SM CLR M09/M12 A3011 RMK AO2 SLP235 T10941117 |
| 06:56 PST |  Clear | -11°C / 12°F | -13°C / 9°F | 85% | 1020 mb (30.12 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KWMC 011456Z AUTO 05003KT 10SM CLR M11/M13 A3012 RMK AO2 SLP236 T11111128 51002 |
| 05:56 PST |  Clear | -11°C / 12°F | -13°C / 9°F | 85% | 1020 mb (30.12 in) | SE 7 kph (SE 4.6 mph) | - | 10SM |
| | KWMC 011356Z AUTO 14004KT 10SM CLR M11/M13 A3011 RMK AO2 SLP228 T11111133 |
| 04:56 PST |  Clear | -10°C / 14°F | -12°C / 10°F | 85% | 1020 mb (30.12 in) | ENE 7 kph (ENE 4.6 mph) | - | 10SM |
| | KWMC 011256Z AUTO 06004KT 10SM CLR M10/M12 A3012 RMK AO2 SLP225 T11001122 |
| 03:56 PST |  Clear | -11°C / 12°F | -13°C / 9°F | 85% | 1020 mb (30.12 in) | S 7 kph (S 4.6 mph) | 0.25 mm (0.01 in) | 10SM |
| | KWMC 011156Z AUTO 17004KT 10SM CLR M11/M13 A3011 RMK AO2 SLP216 P0001 60001 70001 T11061128 11061 21106 56007 |
| 02:56 PST |  Clear | -9°C / 16°F | -12°C / 10°F | 79% | 1020 mb (30.12 in) | Calm | - | 10SM |
| | KWMC 011056Z AUTO 00000KT 10SM CLR M09/M12 A3012 RMK AO2 SLP214 T10941117 |
| 01:56 PST |  Clear | -9°C / 16°F | -11°C / 12°F | 86% | 1020 mb (30.12 in) | SE 11 kph (SE 6.9 mph) | - | 10SM |
| | KWMC 010956Z AUTO 14006KT 10SM CLR M09/M11 A3013 RMK AO2 SLP218 T10941111 |
| 00:56 PST |  Clear | -9°C / 16°F | -11°C / 12°F | 86% | 1020 mb (30.12 in) | SSE 7 kph (SSE 4.6 mph) | - | 10SM |
| | KWMC 010856Z AUTO 15004KT 10SM CLR M09/M11 A3013 RMK AO2 SLP222 T10891111 58005 |