| 11:53 PST |  Overcast | 11°C / 52°F | 7°C / 45°F | 77% | 1028 mb (30.36 in) | SW 15 kph (SW 9.2 mph) | - | 10SM |
| | KSEA 291953Z 21008KT 10SM OVC012 11/07 A3036 RMK AO2 SLP287 T01060072 $ |
| 10:53 PST |  Overcast | 10°C / 50°F | 7°C / 45°F | 82% | 1028 mb (30.36 in) | S 13 kph (S 8.1 mph) | - | 10SM |
| | KSEA 291853Z 18007KT 10SM OVC010 10/07 A3037 RMK AO2 SLP293 T01000072 $ |
| 09:53 PST |  Overcast | 9°C / 48°F | 7°C / 45°F | 87% | 1028 mb (30.36 in) | SSE 17 kph (SSE 10.4 mph) | - | 10SM |
| | KSEA 291753Z 20009KT 10SM OVC010 09/07 A3037 RMK AO2 SLP293 T00940072 10100 20094 53010 $ |
| 08:53 PST |  Overcast | 10°C / 50°F | 7°C / 45°F | 82% | 1028 mb (30.36 in) | S 15 kph (S 9.2 mph) | - | 10SM |
| | KSEA 291653Z 19008KT 10SM OVC012 10/07 A3036 RMK AO2 SLP287 T01000072 $ |
| 07:53 PST |  Overcast | 10°C / 50°F | 7°C / 45°F | 82% | 1028 mb (30.36 in) | SSE 13 kph (SSE 8.1 mph) | - | 10SM |
| | KSEA 291553Z 20007KT 10SM OVC012 10/07 A3035 RMK AO2 SLP285 T01000067 $ |
| 06:53 PST |  Overcast | 10°C / 50°F | 7°C / 45°F | 82% | 1027 mb (30.33 in) | S 17 kph (S 10.4 mph) | - | 10SM |
| | KSEA 291453Z 18009KT 10SM SCT008 OVC012 10/07 A3034 RMK AO2 SLP283 T01000067 58002 $ |
| 06:25 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 15 kph (S 9.2 mph) | - | 10SM |
| | KSEA 291425Z 19008KT 10SM SCT008 OVC012 09/06 A3035 RMK AO2 $ |
| 05:53 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 19 kph (S 11.5 mph) | - | 10SM |
| | KSEA 291353Z 18010KT 10SM OVC012 09/06 A3035 RMK AO2 SLP284 T00940061 $ |
| 04:53 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 19 kph (S 11.5 mph) | - | 10SM |
| | KSEA 291253Z 19010KT 10SM SCT010 OVC013 09/06 A3035 RMK AO2 SLP285 T00940061 $ |
| 03:53 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 20 kph (S 12.7 mph) | - | 10SM |
| | KSEA 291153Z 17011KT 10SM FEW005 OVC013 09/06 A3035 RMK AO2 SLP285 T00940056 10094 20089 58007 $ |
| 02:53 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 19 kph (S 11.5 mph) | - | 10SM |
| | KSEA 291053Z 18010KT 10SM FEW005 OVC013 09/06 A3035 RMK AO2 SLP286 T00890056 $ |
| 01:53 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 13 kph (S 8.1 mph) | - | 10SM |
| | KSEA 290953Z 18007KT 10SM FEW005 BKN013 OVC017 09/06 A3037 RMK AO2 SLP292 T00890056 $ |
| 01:32 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 15 kph (S 9.2 mph) | - | 10SM |
| | KSEA 290932Z 18008KT 10SM FEW005 BKN013 OVC017 09/06 A3037 RMK AO2 $ |
| 00:53 PST |  Overcast | 9°C / 48°F | 6°C / 43°F | 82% | 1028 mb (30.36 in) | S 13 kph (S 8.1 mph) | - | 10SM |
| | KSEA 290853Z 19007KT 10SM OVC015 09/06 A3037 RMK AO2 SLP292 T00890056 55001 $ |