| 06:53 PST |  Obscured Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KSPB 231453Z AUTO 00000KT 1/4SM FZFG VV001 M02/M02 A3046 RMK AO2 SLP315 T10221022 53012 |
| 05:53 PST |  Obscured Fog | -3°C / 27°F | -3°C / 27°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KSPB 231353Z AUTO 00000KT 1/4SM FZFG VV001 M03/M03 A3044 RMK AO2 SLP307 T10281028 |
| 05:27 PST |  Obscured Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KSPB 231327Z AUTO 00000KT 1/4SM FZFG VV001 M02/M02 A3043 RMK AO2 |
| 05:10 PST |  Obscured Fog | -3°C / 27°F | -3°C / 27°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/2SM |
| | KSPB 231310Z AUTO 00000KT 1/2SM FZFG VV001 M03/M03 A3043 RMK AO2 |
| 04:53 PST |  Obscured Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KSPB 231253Z AUTO 00000KT 1/4SM FZFG VV002 M02/M02 A3042 RMK AO2 SLP302 T10221022 |
| 04:46 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KSPB 231246Z AUTO 00000KT 1/4SM FZFG OVC003 M02/M02 A3042 RMK AO2 |
| 04:21 PST |  Obscured Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KSPB 231221Z AUTO 00000KT 1/4SM FZFG VV001 M02/M02 A3043 RMK AO2 |
| 04:17 PST |  Mostly Cloudy Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | NNW 6 kph (NNW 3.5 mph) | - | 3/4SM |
| | KSPB 231217Z AUTO 34003KT 3/4SM BR BKN002 M02/M02 A3043 RMK AO2 |
| 04:09 PST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1030 mb (30.42 in) | Calm | - | 2SM |
| | KSPB 231209Z AUTO 00000KT 2SM BR BKN004 M03/M03 A3042 RMK AO2 |
| 04:06 PST |  Partly Cloudy Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1030 mb (30.42 in) | Calm | - | 1 1/2SM |
| | KSPB 231206Z AUTO 00000KT 1 1/2SM BR SCT004 M03/M03 A3042 RMK AO2 |
| 03:53 PST |  Partly Cloudy Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1030 mb (30.42 in) | Calm | - | 2 1/2SM |
| | KSPB 231153Z AUTO 00000KT 2 1/2SM BR FEW002 M03/M03 A3042 RMK AO2 VIS 1 3/4V4 SLP303 T10281028 11017 21028 53002 |
| 03:48 PST |  Partly Cloudy Fog And Mist | -2°C / 28°F | -3°C / 27°F | 93% | 1030 mb (30.42 in) | Calm | - | 2 1/2SM |
| | KSPB 231148Z AUTO 00000KT 2 1/2SM BR SCT004 SCT020 M02/M03 A3042 RMK AO2 VIS 1 3/4V3 |
| 03:39 PST |  Mostly Cloudy Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 2SM |
| | KSPB 231139Z AUTO 00000KT 2SM BR SCT001 BKN006 BKN020 M02/M02 A3042 RMK AO2 |
| 03:28 PST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1 3/4SM |
| | KSPB 231128Z AUTO 00000KT 1 3/4SM BR BKN001 OVC006 M02/M02 A3042 RMK AO2 |
| 03:20 PST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 3SM |
| | KSPB 231120Z AUTO 00000KT 3SM BR OVC001 M02/M02 A3042 RMK AO2 CIG 001V005 |
| 03:10 PST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1SM |
| | KSPB 231110Z AUTO 00000KT 1SM BR BKN001 OVC004 M02/M02 A3042 RMK AO2 |
| 03:00 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/2SM |
| | KSPB 231100Z AUTO 00000KT 1/2SM FZFG OVC004 M02/M02 A3041 RMK AO2 CIG 001V005 |
| 02:53 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KSPB 231053Z AUTO 00000KT 1/4SM FZFG OVC004 M02/M02 A3042 RMK AO2 SLP300 T10171017 |
| 02:18 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KSPB 231018Z AUTO 00000KT 1/4SM FZFG OVC002 M02/M02 A3041 RMK AO2 |
| 01:53 PST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1SM |
| | KSPB 230953Z AUTO 00000KT 1SM BR OVC002 M02/M02 A3042 RMK AO2 SLP300 T10171017 |
| 01:49 PST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1SM |
| | KSPB 230949Z AUTO 00000KT 1SM BR OVC002 M02/M02 A3041 RMK AO2 |
| 00:53 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1029 mb (30.39 in) | Calm | - | 1/2SM |
| | KSPB 230853Z AUTO 00000KT 1/2SM FZFG OVC004 M02/M02 A3040 RMK AO2 SLP294 T10221022 51013 |
| 00:33 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1029 mb (30.39 in) | Calm | - | 1/4SM |
| | KSPB 230833Z AUTO 00000KT 1/4SM FZFG OVC002 M02/M02 A3040 RMK AO2 CIG 001V004 |
| 00:26 PST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1029 mb (30.39 in) | Calm | - | 1 3/4SM |
| | KSPB 230826Z AUTO 00000KT 1 3/4SM BR OVC002 M02/M02 A3039 RMK AO2 CIG 001V004 |
| 00:00 PST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1029 mb (30.39 in) | Calm | - | 6SM |
| | KSPB 230800Z AUTO 00000KT 6SM BR BKN004 M03/M03 A3040 RMK AO2 |