| 06:53 PST |  Clear | -7°C / 19°F | -9°C / 16°F | 86% | 1016 mb (30 in) | Calm | - | 8SM |
| | KSIY 261453Z AUTO 00000KT 8SM CLR M07/M09 A3000 RMK AO2 SLP197 T10721089 55003 $ |
| 05:53 PST |  Clear | -8°C / 18°F | -9°C / 16°F | 93% | 1016 mb (30 in) | S 6 kph (S 3.5 mph) | - | 9SM |
| | KSIY 261353Z AUTO 19003KT 9SM CLR M08/M09 A2999 RMK AO2 SLP190 T10781089 $ |
| 04:53 PST |  Clear | -7°C / 19°F | -9°C / 16°F | 86% | 1016 mb (30 in) | Calm | - | 8SM |
| | KSIY 261253Z AUTO 00000KT 8SM CLR M07/M09 A3000 RMK AO2 SLP189 T10671089 $ |
| 03:53 PST |  Clear | -7°C / 19°F | -9°C / 16°F | 86% | 1016 mb (30 in) | Calm | - | 9SM |
| | KSIY 261153Z AUTO 00000KT 9SM CLR M07/M09 A3001 RMK AO2 SLP192 T10721089 11039 21072 58005 $ |
| 02:53 PST |  Clear | -7°C / 19°F | -9°C / 16°F | 86% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KSIY 261053Z AUTO 00000KT 10SM CLR M07/M09 A3002 RMK AO2 SLP194 T10671089 $ |
| 01:53 PST |  Clear | -7°C / 19°F | -8°C / 18°F | 93% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KSIY 260953Z AUTO 00000KT 10SM CLR M07/M08 A3003 RMK AO2 SLP197 T10671078 $ |
| 00:53 PST |  Clear | -6°C / 21°F | -7°C / 19°F | 93% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KSIY 260853Z AUTO 00000KT 10SM CLR M06/M07 A3003 RMK AO2 SLP198 T10561072 58009 $ |