| 06:53 PST |  Overcast | 1°C / 34°F | 1°C / 34°F | 100% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KSPB 221453Z AUTO 00000KT 10SM OVC065 01/01 A3002 RMK AO2 SLP165 T00110011 53026 |
| 05:53 PST |  Mostly Cloudy | 1°C / 34°F | 1°C / 34°F | 100% | 1016 mb (30 in) | Calm | - | 10SM |
| | KSPB 221353Z AUTO 00000KT 10SM FEW028 BKN038 BKN070 01/01 A2999 RMK AO2 SLP154 T00110011 |
| 04:53 PST |  Overcast | 1°C / 34°F | 1°C / 34°F | 100% | 1015 mb (29.97 in) | Calm | - | 10SM |
| | KSPB 221253Z AUTO 00000KT 10SM BKN044 OVC055 01/01 A2997 RMK AO2 SLP147 T00110006 |
| 03:53 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1014 mb (29.94 in) | Calm | 0.00 mm (0.00 in) | 10SM |
| | KSPB 221153Z AUTO 00000KT 10SM FEW060 BKN080 OVC100 02/01 A2994 RMK AO2 RAB05E14 SLP139 P0000 60002 7//// T00220011 10028 20011 53008 |
| 02:53 PST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1014 mb (29.94 in) | SSW 6 kph (SSW 3.5 mph) | - | 10SM |
| | KSPB 221053Z AUTO 25003KT 10SM FEW034 BKN049 OVC060 02/02 A2994 RMK AO2 SLP137 T00220017 |
| 01:53 PST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1013 mb (29.91 in) | Calm | 0.00 mm (0.00 in) | 10SM |
| | KSPB 220953Z AUTO 00000KT 10SM FEW034 BKN065 OVC080 02/02 A2992 RMK AO2 RAB0855E10 SLP132 P0000 T00170017 |
| 00:53 PST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1013 mb (29.91 in) | Calm | 0.51 mm (0.02 in) | 10SM |
| | KSPB 220853Z AUTO 00000KT 10SM SCT032 OVC065 02/02 A2992 RMK AO2 RAE35 SLP131 P0002 60002 T00220017 50001 |
| 00:34 PST |  Overcast Light Rain | 2°C / 36°F | 2°C / 36°F | 100% | 1013 mb (29.91 in) | Calm | 0.51 mm (0.02 in) | 10SM |
| | KSPB 220834Z AUTO 00000KT 10SM -RA SCT035 BKN050 OVC095 02/02 A2992 RMK AO2 P0002 |
| 00:13 PST |  Overcast Light Rain | 2°C / 36°F | 2°C / 36°F | 100% | 1013 mb (29.91 in) | SSE 6 kph (SSE 3.5 mph) | 0.25 mm (0.01 in) | 10SM |
| | KSPB 220813Z AUTO 20003KT 10SM -RA BKN020 BKN040 OVC060 02/02 A2992 RMK AO2 P0001 |