| 20:53 PST |  Clear | -15°C / 5°F | -21°C / -6°F | 60% | 1021 mb (30.15 in) | SE 6 kph (SE 3.5 mph) | - | 10SM |
| | KDEW 090453Z AUTO 14003KT 10SM CLR M15/M21 A3016 RMK AO2 SLP263 T11501206 |
| 19:53 PST |  Clear | -17°C / 1°F | -22°C / -8°F | 65% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KDEW 090353Z AUTO 00000KT 10SM CLR M17/M22 A3017 RMK AO2 SLP268 T11721217 |
| 18:53 PST |  Clear | -18°C / 0°F | -23°C / -9°F | 65% | 1021 mb (30.15 in) | SE 6 kph (SE 3.5 mph) | - | 10SM |
| | KDEW 090253Z AUTO 14003KT 10SM CLR M18/M23 A3016 RMK AO2 SLP269 T11831228 53005 |
| 17:53 PST |  Clear | -18°C / 0°F | -23°C / -9°F | 65% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KDEW 090153Z AUTO 00000KT 10SM CLR M18/M23 A3015 RMK AO2 SLP271 T11831233 |
| 16:53 PST |  Clear | -16°C / 3°F | -23°C / -9°F | 55% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KDEW 090053Z AUTO 00000KT 10SM CLR M16/M23 A3015 RMK AO2 SLP263 T11561228 |
| 15:53 PST |  Clear | -9°C / 16°F | -25°C / -13°F | 26% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KDEW 082353Z AUTO 00000KT 10SM CLR M09/M25 A3015 RMK AO2 SLP256 T10941250 11078 21117 53002 |
| 14:53 PST |  Clear | -8°C / 18°F | -24°C / -11°F | 27% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KDEW 082253Z AUTO 00000KT 10SM CLR M08/M24 A3014 RMK AO2 SLP250 T10781239 |
| 13:53 PST |  Clear | -8°C / 18°F | -24°C / -11°F | 27% | 1021 mb (30.15 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KDEW 082153Z AUTO 04006KT 10SM CLR M08/M24 A3014 RMK AO2 SLP247 T10781239 |
| 12:53 PST |  Clear | -8°C / 18°F | -22°C / -8°F | 32% | 1021 mb (30.15 in) | N 11 kph (N 6.9 mph) | - | 10SM |
| | KDEW 082053Z AUTO 01006KT 10SM CLR M08/M22 A3014 RMK AO2 SLP249 T10831222 58004 |
| 11:53 PST |  Clear | -9°C / 16°F | -21°C / -6°F | 37% | 1021 mb (30.15 in) | NNE 13 kph (NNE 8.1 mph) | - | 10SM |
| | KDEW 081953Z AUTO 02007KT 10SM CLR M09/M21 A3015 RMK AO2 SLP256 T10891211 |
| 10:53 PST |  Clear | -11°C / 12°F | -21°C / -6°F | 44% | 1022 mb (30.18 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KDEW 081853Z AUTO 33004KT 10SM CLR M11/M21 A3017 RMK AO2 SLP263 T11061206 |
| 09:53 PST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1021 mb (30.15 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KDEW 081753Z AUTO 01005KT 10SM CLR M12/M20 A3015 RMK AO2 SLP257 T11171200 11117 21206 51028 |
| 08:53 PST |  Clear | -15°C / 5°F | -21°C / -6°F | 60% | 1020 mb (30.12 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KDEW 081653Z AUTO 35005KT 10SM CLR M15/M21 A3013 RMK AO2 SLP257 T11501206 |
| 07:53 PST |  Clear | -16°C / 3°F | -21°C / -6°F | 66% | 1019 mb (30.09 in) | NNE 11 kph (NNE 6.9 mph) | - | 10SM |
| | KDEW 081553Z AUTO 02006KT 10SM CLR M16/M21 A3010 RMK AO2 SLP243 T11561211 |
| 06:53 PST |  Clear | -17°C / 1°F | -22°C / -8°F | 65% | 1018 mb (30.06 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KDEW 081453Z AUTO 01005KT 10SM CLR M17/M22 A3006 RMK AO2 SLP234 T11721217 52015 |
| 05:53 PST |  Clear | -21°C / -6°F | -24°C / -11°F | 77% | 1018 mb (30.06 in) | NE 9 kph (NE 5.8 mph) | - | 10SM |
| | KDEW 081353Z AUTO 03005KT 10SM CLR M21/M24 A3005 RMK AO2 SLP231 T12061239 |
| 04:53 PST |  Clear | -19°C / -2°F | -23°C / -9°F | 71% | 1017 mb (30.03 in) | NE 9 kph (NE 5.8 mph) | - | 10SM |
| | KDEW 081253Z AUTO 03005KT 10SM CLR M19/M23 A3004 RMK AO2 SLP222 T11941233 |
| 03:53 PST |  Clear | -19°C / -2°F | -23°C / -9°F | 71% | 1017 mb (30.03 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KDEW 081153Z AUTO 05004KT 10SM CLR M19/M23 A3002 RMK AO2 SLP214 T11941233 11156 21206 51013 |
| 02:53 PST |  Clear | -16°C / 3°F | -22°C / -8°F | 60% | 1016 mb (30 in) | N 19 kph (N 11.5 mph) | - | 10SM |
| | KDEW 081053Z AUTO 01010KT 10SM CLR M16/M22 A3001 RMK AO2 SLP205 T11561222 |
| 01:53 PST |  Clear | -16°C / 3°F | -22°C / -8°F | 60% | 1016 mb (30 in) | N 15 kph (N 9.2 mph) | - | 10SM |
| | KDEW 080953Z AUTO 01008KT 10SM CLR M16/M22 A2999 RMK AO2 SLP199 T11611222 |
| 00:53 PST |  Clear | -16°C / 3°F | -22°C / -8°F | 60% | 1015 mb (29.97 in) | NNE 13 kph (NNE 8.1 mph) | - | 10SM |
| | KDEW 080853Z AUTO 02007KT 10SM CLR M16/M22 A2998 RMK AO2 SLP194 T11561222 50003 |