| 05:54 PST |  Obscured Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | Calm | - | 1/2SM |
| | KEUG 051354Z 00000KT 1/2SM FZFG VV002 M03/M04 A3028 RMK AO2 SLP258 T10281044 RVRNO |
| 05:44 PST |  Obscured Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | Calm | - | 1/2SM |
| | KEUG 051344Z 00000KT 1/2SM FZFG VV002 M03/M04 A3028 RMK AO2 RVRNO |
| 04:54 PST |  Obscured Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | Calm | - | 1/4SM |
| | KEUG 051254Z 00000KT 1/4SM FZFG VV002 M03/M04 A3028 RMK AO2 SLP257 T10281039 RVRNO |
| 04:51 PST |  Obscured Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | Calm | - | 1/4SM |
| | KEUG 051251Z 00000KT 1/4SM FZFG VV002 M03/M04 A3028 RMK AO2 RVRNO |
| 03:56 PST |  Obscured Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | S 6 kph (S 3.5 mph) | - | 1/2SM |
| | KEUG 051156Z 19003KT 1/2SM FZFG VV003 M03/M04 A3028 RMK AO2 RVRNO |
| 03:54 PST |  Obscured Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | S 6 kph (S 3.5 mph) | - | 1/8SM |
| | KEUG 051154Z 19003KT 1/8SM FZFG VV001 M03/M04 A3028 RMK AO2 SLP259 T10331044 11017 21056 51007 RVRNO |
| 03:15 PST |  Obscured Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1026 mb (30.3 in) | SSE 6 kph (SSE 3.5 mph) | - | 1/8SM |
| | KEUG 051115Z 20003KT 1/8SM FZFG VV001 M04/M05 A3029 RMK AO2 RVRNO |
| 03:05 PST |  Obscured Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1026 mb (30.3 in) | S 6 kph (S 3.5 mph) | - | 1/4SM |
| | KEUG 051105Z 19003KT 1/4SM FZFG VV001 M04/M06 A3029 RMK AO2 RVRNO |
| 02:54 PST |  Obscured Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1025 mb (30.27 in) | Calm | - | 1/2SM |
| | KEUG 051054Z 00000KT 1/2SM FZFG VV002 M04/M06 A3028 RMK AO2 SLP258 T10441061 RVRNO |
| 02:47 PST |  Obscured Fog And Mist | -5°C / 23°F | -7°C / 19°F | 86% | 1025 mb (30.27 in) | Calm | - | 1SM |
| | KEUG 051047Z 00000KT 1SM BR VV002 M05/M07 A3028 RMK AO2 VIS N-E-SE 1/2 W 2 RVRNO |
| 02:40 PST |  Mostly Cloudy Fog And Mist | -5°C / 23°F | -7°C / 19°F | 86% | 1025 mb (30.27 in) | Calm | - | 6SM |
| | KEUG 051040Z 00000KT 6SM BR FEW001 BKN002 BKN040 M05/M07 A3028 RMK AO2 VIS NE 1 SE-S 3/4 BR FEW001 |
| 01:54 PST |  Partly Cloudy | -4°C / 25°F | -6°C / 21°F | 86% | 1025 mb (30.27 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KEUG 050954Z 03003KT 10SM SCT042 SCT055 M04/M06 A3028 RMK AO2 SLP257 T10391056 |
| 00:54 PST |  Partly Cloudy | -3°C / 27°F | -4°C / 25°F | 93% | 1025 mb (30.27 in) | SSW 6 kph (SSW 3.5 mph) | - | 9SM |
| | KEUG 050854Z 25003KT 9SM FEW055 M03/M04 A3026 RMK AO2 SLP251 T10331044 51007 |