| 04:53 PST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1025 mb (30.27 in) | NNW 6 kph (NNW 3.5 mph) | - | 4SM |
| | KPSC 011253Z AUTO 34003KT 4SM BR OVC065 00/M01 A3027 RMK AO2 SLP252 T00001011 |
| 04:19 PST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1025 mb (30.27 in) | N 6 kph (N 3.5 mph) | - | 3SM |
| | KPSC 011219Z AUTO 35003KT 3SM BR FEW001 OVC065 M01/M01 A3026 RMK AO2 |
| 04:16 PST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1025 mb (30.27 in) | N 6 kph (N 3.5 mph) | - | 1 3/4SM |
| | KPSC 011216Z AUTO 35003KT 1 3/4SM BR FEW001 OVC065 M01/M01 A3026 RMK AO2 |
| 04:01 PST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1024 mb (30.24 in) | NNW 6 kph (NNW 3.5 mph) | - | 3/4SM |
| | KPSC 011201Z AUTO 33003KT 3/4SM BR FEW001 OVC070 M01/M01 A3025 RMK AO2 |
| 03:53 PST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1024 mb (30.24 in) | Calm | - | 2 1/2SM |
| | KPSC 011153Z AUTO 00000KT 2 1/2SM BR FEW001 OVC070 M01/M01 A3025 RMK AO2 SLP248 T10061011 10022 21011 51015 |
| 03:43 PST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1024 mb (30.24 in) | NW 7 kph (NW 4.6 mph) | - | 3SM |
| | KPSC 011143Z AUTO 32004KT 3SM BR FEW001 OVC070 M01/M01 A3025 RMK AO2 |
| 02:53 PST |  Partly Cloudy | -1°C / 30°F | -2°C / 28°F | 93% | 1024 mb (30.24 in) | N 7 kph (N 4.6 mph) | - | 7SM |
| | KPSC 011053Z AUTO 35004KT 7SM FEW060 M01/M02 A3024 RMK AO2 SLP244 T10061017 |
| 01:53 PST |  Mostly Cloudy Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1023 mb (30.21 in) | NNW 6 kph (NNW 3.5 mph) | - | 5SM |
| | KPSC 010953Z AUTO 34003KT 5SM BR BKN070 00/M01 A3022 RMK AO2 SLP238 T00001006 |
| 00:53 PST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1023 mb (30.21 in) | Calm | - | 6SM |
| | KPSC 010853Z AUTO 00000KT 6SM BR OVC075 01/00 A3021 RMK AO2 SLP233 T00060000 51008 |