| 10:15 PST |  Overcast | -6°C / 21°F | -8°C / 18°F | 86% | 1019 mb (30.09 in) | SSW 15 kph (SSW 9.2 mph) | - | 10SM |
| | KCOE 041815Z AUTO 25008KT 10SM OVC010 M06/M08 A3008 RMK AO1 |
| 09:55 PST |  Overcast | -6°C / 21°F | -8°C / 18°F | 86% | 1019 mb (30.09 in) | SSW 11 kph (SSW 6.9 mph) | - | 9SM |
| | KCOE 041755Z AUTO 25006KT 9SM OVC010 M06/M08 A3008 RMK AO1 11060 21090 54000 |
| 09:35 PST |  Overcast | -6°C / 21°F | -8°C / 18°F | 86% | 1019 mb (30.09 in) | W 9 kph (W 5.8 mph) | - | 10SM |
| | KCOE 041735Z AUTO 27005KT 10SM OVC010 M06/M08 A3008 RMK AO1 |
| 09:15 PST |  Overcast | -6°C / 21°F | -7°C / 19°F | 93% | 1018 mb (30.06 in) | SSW 13 kph (SSW 8.1 mph) | - | 10SM |
| | KCOE 041715Z AUTO 24007KT 10SM OVC008 M06/M07 A3007 RMK AO1 |
| 08:55 PST |  Overcast | -6°C / 21°F | -8°C / 18°F | 86% | 1019 mb (30.09 in) | SSE 7 kph (SSE 4.6 mph) | - | 10SM |
| | KCOE 041655Z AUTO 20004KT 10SM OVC008 M06/M08 A3008 RMK AO1 |
| 08:35 PST |  Overcast | -6°C / 21°F | -8°C / 18°F | 86% | 1019 mb (30.09 in) | SW 11 kph (SW 6.9 mph) | - | 10SM |
| | KCOE 041635Z AUTO 23006KT 10SM OVC008 M06/M08 A3008 RMK AO1 |
| 08:15 PST |  Overcast | -6°C / 21°F | -8°C / 18°F | 86% | 1018 mb (30.06 in) | SW 9 kph (SW 5.8 mph) | - | 10SM |
| | KCOE 041615Z AUTO 23005KT 10SM BKN010 OVC015 M06/M08 A3007 RMK AO1 |
| 07:55 PST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1019 mb (30.09 in) | W 11 kph (W 6.9 mph) | - | 10SM |
| | KCOE 041555Z AUTO 28006KT 10SM FEW005 OVC013 M07/M08 A3008 RMK AO1 |
| 07:35 PST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1019 mb (30.09 in) | W 13 kph (W 8.1 mph) | - | 10SM |
| | KCOE 041535Z AUTO 27007KT 10SM BKN006 OVC015 M07/M08 A3008 RMK AO1 |
| 07:15 PST |  Overcast | -7°C / 19°F | -9°C / 16°F | 86% | 1019 mb (30.09 in) | SSW 7 kph (SSW 4.6 mph) | - | 10SM |
| | KCOE 041515Z AUTO 25004KT 10SM OVC008 M07/M09 A3008 RMK AO1 |
| 06:55 PST |  Overcast | -7°C / 19°F | -9°C / 16°F | 86% | 1019 mb (30.09 in) | SSW 7 kph (SSW 4.6 mph) | - | 10SM |
| | KCOE 041455Z AUTO 24004KT 10SM BKN010 OVC014 M07/M09 A3008 RMK AO1 57003 |
| 06:35 PST |  Overcast | -7°C / 19°F | -9°C / 16°F | 86% | 1019 mb (30.09 in) | SSW 11 kph (SSW 6.9 mph) | - | 10SM |
| | KCOE 041435Z AUTO 26006KT 10SM OVC012 M07/M09 A3008 RMK AO1 |
| 06:15 PST |  Overcast | -8°C / 18°F | -9°C / 16°F | 93% | 1019 mb (30.09 in) | W 15 kph (W 9.2 mph) | - | 10SM |
| | KCOE 041415Z AUTO 27008KT 10SM OVC012 M08/M09 A3010 RMK AO1 |
| 05:55 PST |  Overcast | -9°C / 16°F | -11°C / 12°F | 86% | 1019 mb (30.09 in) | SSW 9 kph (SSW 5.8 mph) | - | 10SM |
| | KCOE 041355Z AUTO 25005KT 10SM BKN010 OVC095 M09/M11 A3010 RMK AO1 |
| 05:35 PST |  Overcast | -9°C / 16°F | -11°C / 12°F | 86% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KCOE 041335Z AUTO 00000KT 10SM OVC008 M09/M11 A3010 RMK AO1 |
| 05:15 PST |  Mostly Cloudy | -9°C / 16°F | -11°C / 12°F | 86% | 1019 mb (30.09 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KCOE 041315Z AUTO 03006KT 10SM BKN006 M09/M11 A3009 RMK AO1 |
| 04:55 PST |  Mostly Cloudy | -9°C / 16°F | -12°C / 10°F | 79% | 1019 mb (30.09 in) | NNE 11 kph (NNE 6.9 mph) | - | 10SM |
| | KCOE 041255Z AUTO 02006KT 10SM BKN006 M09/M12 A3008 RMK AO1 |
| 04:35 PST |  Mostly Cloudy | -9°C / 16°F | -11°C / 12°F | 86% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KCOE 041235Z AUTO 00000KT 10SM BKN006 M09/M11 A3008 RMK AO1 |
| 04:15 PST |  Clear | -8°C / 18°F | -11°C / 12°F | 79% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KCOE 041215Z AUTO 00000KT 10SM CLR M08/M11 A3009 RMK AO1 |
| 03:55 PST |  Clear | -8°C / 18°F | -11°C / 12°F | 79% | 1019 mb (30.09 in) | ESE 9 kph (ESE 5.8 mph) | - | 10SM |
| | KCOE 041155Z AUTO 11005KT 10SM CLR M08/M11 A3009 RMK AO1 11060 21090 57030 |
| 03:35 PST |  Partly Cloudy | -8°C / 18°F | -11°C / 12°F | 79% | 1020 mb (30.12 in) | ENE 7 kph (ENE 4.6 mph) | - | 10SM |
| | KCOE 041135Z AUTO 07004KT 10SM FEW110 M08/M11 A3011 RMK AO1 |
| 03:15 PST |  Partly Cloudy | -8°C / 18°F | -11°C / 12°F | 79% | 1020 mb (30.12 in) | ENE 11 kph (ENE 6.9 mph) | - | 10SM |
| | KCOE 041115Z AUTO 06006KT 10SM FEW110 M08/M11 A3012 RMK AO1 |
| 02:55 PST |  Clear | -8°C / 18°F | -10°C / 14°F | 86% | 1020 mb (30.12 in) | ENE 11 kph (ENE 6.9 mph) | - | 10SM |
| | KCOE 041055Z AUTO 06006KT 10SM CLR M08/M10 A3013 RMK AO1 |
| 02:35 PST |  Clear | -8°C / 18°F | -11°C / 12°F | 79% | 1021 mb (30.15 in) | E 13 kph (E 8.1 mph) | - | 10SM |
| | KCOE 041035Z AUTO 08007KT 10SM CLR M08/M11 A3014 RMK AO1 |
| 02:15 PST |  Clear | -8°C / 18°F | -11°C / 12°F | 79% | 1021 mb (30.15 in) | ENE 9 kph (ENE 5.8 mph) | - | 10SM |
| | KCOE 041015Z AUTO 07005KT 10SM CLR M08/M11 A3015 RMK AO1 |
| 01:55 PST |  Clear | -7°C / 19°F | -10°C / 14°F | 79% | 1021 mb (30.15 in) | ENE 13 kph (ENE 8.1 mph) | - | 10SM |
| | KCOE 040955Z AUTO 07007KT 10SM CLR M07/M10 A3016 RMK AO1 |
| 01:35 PST |  Clear | -7°C / 19°F | -10°C / 14°F | 79% | 1022 mb (30.18 in) | ENE 11 kph (ENE 6.9 mph) | - | 10SM |
| | KCOE 040935Z AUTO 06006KT 10SM CLR M07/M10 A3017 RMK AO1 |
| 01:15 PST |  Clear | -7°C / 19°F | -10°C / 14°F | 79% | 1022 mb (30.18 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KCOE 040915Z AUTO 05007KT 10SM CLR M07/M10 A3018 RMK AO1 |
| 00:55 PST |  Clear | -7°C / 19°F | -9°C / 16°F | 86% | 1022 mb (30.18 in) | ENE 13 kph (ENE 8.1 mph) | - | 10SM |
| | KCOE 040855Z AUTO 07007KT 10SM CLR M07/M09 A3018 RMK AO1 57017 |
| 00:35 PST |  Clear | -6°C / 21°F | -9°C / 16°F | 80% | 1022 mb (30.18 in) | NE 17 kph (NE 10.4 mph) | - | 10SM |
| | KCOE 040835Z AUTO 05009KT 10SM CLR M06/M09 A3019 RMK AO1 |
| 00:15 PST |  Clear | -6°C / 21°F | -9°C / 16°F | 80% | 1022 mb (30.18 in) | NE 15 kph (NE 9.2 mph) | - | 10SM |
| | KCOE 040815Z AUTO 05008KT 10SM CLR M06/M09 A3019 RMK AO1 |