| 12:56 PST |  Clear | -12°C / 10°F | -18°C / 0°F | 61% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KEKO 102056Z AUTO 00000KT 10SM CLR M12/M18 A3002 RMK AO2 SLP265 T11221178 58021 |
| 11:56 PST |  Clear | -16°C / 3°F | -18°C / 0°F | 85% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KEKO 101956Z AUTO 00000KT 10SM CLR M16/M18 A3004 RMK AO2 SLP279 T11561183 |
| 10:56 PST |  Clear | -17°C / 1°F | -20°C / -4°F | 78% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KEKO 101856Z AUTO 00000KT 10SM CLR M17/M20 A3007 RMK AO2 SLP287 T11721200 |
| 09:56 PST |  Clear | -20°C / -4°F | -22°C / -8°F | 84% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KEKO 101756Z AUTO 00000KT 10SM CLR M20/M22 A3009 RMK AO2 SLP308 T12001217 11200 21278 50004 |
| 08:56 PST |  Partly Cloudy | -24°C / -11°F | -25°C / -13°F | 91% | 1019 mb (30.09 in) | Calm | - | 9SM |
| | KEKO 101656Z AUTO 00000KT 9SM FEW001 M24/M25 A3009 RMK AO2 SLP316 T12391250 |
| 08:54 PST |  Partly Cloudy | -24°C / -11°F | -25°C / -13°F | 91% | 1019 mb (30.09 in) | Calm | - | 8SM |
| | KEKO 101654Z AUTO 00000KT 8SM FEW001 M24/M25 A3009 RMK AO2 |
| 08:43 PST |  Partly Cloudy Fog And Mist | -24°C / -11°F | -26°C / -15°F | 84% | 1019 mb (30.09 in) | Calm | - | 2SM |
| | KEKO 101643Z AUTO 00000KT 2SM BR SCT001 M24/M26 A3009 RMK AO2 |
| 08:22 PST |  Partly Cloudy | -24°C / -11°F | -27°C / -17°F | 76% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KEKO 101622Z AUTO 00000KT 10SM FEW001 M24/M27 A3008 RMK AO2 |
| 07:56 PST |  Clear | -24°C / -11°F | -27°C / -17°F | 76% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KEKO 101556Z AUTO 00000KT 10SM CLR M24/M27 A3007 RMK AO2 SLP303 T12441272 |
| 07:06 PST |  Partly Cloudy Hazy | -26°C / -15°F | -28°C / -18°F | 83% | 1018 mb (30.06 in) | ENE 7 kph (ENE 4.6 mph) | - | 5SM |
| | KEKO 101506Z AUTO 07004KT 5SM HZ FEW001 M26/M28 A3006 RMK AO2 |
| 06:56 PST |  Partly Cloudy Hazy | -26°C / -15°F | -29°C / -20°F | 76% | 1018 mb (30.06 in) | E 7 kph (E 4.6 mph) | - | 5SM |
| | KEKO 101456Z AUTO 08004KT 5SM HZ FEW011 M26/M29 A3006 RMK AO2 SLP313 T12611294 51003 |
| 05:56 PST |  Partly Cloudy Hazy | -27°C / -17°F | -30°C / -22°F | 76% | 1018 mb (30.06 in) | Calm | - | 5SM |
| | KEKO 101356Z AUTO 00000KT 5SM HZ FEW001 SCT007 M27/M30 A3005 RMK AO2 SLP299 T12721300 |
| 05:39 PST |  Mostly Cloudy | -28°C / -18°F | -29°C / -20°F | 91% | 1018 mb (30.06 in) | Calm | - | 7SM |
| | KEKO 101339Z AUTO 00000KT 7SM SCT001 BKN007 M28/M29 A3005 RMK AO2 |
| 05:31 PST |  Partly Cloudy Fog And Mist | -28°C / -18°F | -29°C / -20°F | 91% | 1018 mb (30.06 in) | Calm | - | 5SM |
| | KEKO 101331Z AUTO 00000KT 5SM BR SCT001 SCT007 M28/M29 A3005 RMK AO2 |
| 04:56 PST |  Clear | -28°C / -18°F | -30°C / -22°F | 83% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KEKO 101256Z AUTO 00000KT 10SM CLR M28/M30 A3004 RMK AO2 SLP293 T12781300 |
| 03:56 PST |  Clear | -25°C / -13°F | -28°C / -18°F | 76% | 1018 mb (30.06 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KEKO 101156Z AUTO 09003KT 10SM CLR M25/M28 A3005 RMK AO2 SLP271 T12501278 11206 21261 50001 |
| 02:56 PST |  Clear | -24°C / -11°F | -27°C / -17°F | 76% | 1018 mb (30.06 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KEKO 101056Z AUTO 04003KT 10SM CLR M24/M27 A3005 RMK AO2 SLP265 T12391267 |
| 01:56 PST |  Clear | -24°C / -11°F | -26°C / -15°F | 84% | 1018 mb (30.06 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KEKO 100956Z AUTO 08003KT 10SM CLR M24/M26 A3006 RMK AO2 SLP265 T12391261 |
| 01:21 PST |  Partly Cloudy | -26°C / -15°F | -29°C / -20°F | 76% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KEKO 100921Z AUTO 00000KT 10SM SCT001 M26/M29 A3005 RMK AO2 |
| 01:13 PST |  Partly Cloudy Fog And Mist | -26°C / -15°F | -27°C / -17°F | 91% | 1018 mb (30.06 in) | Calm | - | 1 1/4SM |
| | KEKO 100913Z AUTO 00000KT 1 1/4SM BR SCT001 M26/M27 A3005 RMK AO2 |
| 01:00 PST |  Obscured Fog And Mist | -25°C / -13°F | -27°C / -17°F | 83% | 1017 mb (30.03 in) | Calm | - | 3/4SM |
| | KEKO 100900Z AUTO 00000KT 3/4SM BR VV001 M25/M27 A3004 RMK AO2 |
| 00:58 PST |  Partly Cloudy Fog And Mist | -24°C / -11°F | -27°C / -17°F | 76% | 1017 mb (30.03 in) | Calm | - | 1 1/4SM |
| | KEKO 100858Z AUTO 00000KT 1 1/4SM BR FEW001 M24/M27 A3004 RMK AO2 |
| 00:56 PST |  Partly Cloudy Hazy | -24°C / -11°F | -27°C / -17°F | 76% | 1017 mb (30.03 in) | Calm | - | 3SM |
| | KEKO 100856Z AUTO 00000KT 3SM HZ FEW001 M24/M27 A3004 RMK AO2 SLP270 T12391267 50001 |