| 06:52 PST |  Clear | -2°C / 28°F | -2°C / 28°F | 100% | 1026 mb (30.3 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KMWH 251452Z 04004KT 10SM CLR M02/M02 A3031 RMK AO2 SLP276 T10171017 58007 |
| 05:52 PST |  Clear | -1°C / 30°F | -2°C / 28°F | 93% | 1027 mb (30.33 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KMWH 251352Z 35004KT 10SM CLR M01/M02 A3032 RMK AO2 SLP281 T10111017 |
| 04:52 PST |  Clear | -1°C / 30°F | -1°C / 30°F | 100% | 1027 mb (30.33 in) | NNW 11 kph (NNW 6.9 mph) | - | 10SM |
| | KMWH 251252Z AUTO 34006KT 10SM CLR M01/M01 A3033 RMK AO2 SLP281 T10111011 |
| 03:52 PST |  Clear | -1°C / 30°F | -2°C / 28°F | 93% | 1027 mb (30.33 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KMWH 251152Z AUTO 01004KT 10SM CLR M01/M02 A3033 RMK AO2 SLP280 T10111017 10011 21011 58005 |
| 02:52 PST |  Clear | -1°C / 30°F | -1°C / 30°F | 100% | 1027 mb (30.33 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KMWH 251052Z AUTO 36005KT 10SM CLR M01/M01 A3034 RMK AO2 SLP283 T10061011 |
| 01:52 PST |  Clear | 0°C / 32°F | -1°C / 30°F | 93% | 1028 mb (30.36 in) | N 13 kph (N 8.1 mph) | - | 10SM |
| | KMWH 250952Z AUTO 01007KT 10SM CLR 00/M01 A3035 RMK AO2 SLP285 T00001006 |
| 00:52 PST |  Clear | 0°C / 32°F | -1°C / 30°F | 93% | 1027 mb (30.33 in) | NNE 7 kph (NNE 4.6 mph) | - | 10SM |
| | KMWH 250852Z AUTO 02004KT 10SM CLR 00/M01 A3034 RMK AO2 SLP284 T00001006 56006 |