| 20:54 PST |  Partly Cloudy | -3°C / 27°F | -4°C / 25°F | 93% | 1023 mb (30.21 in) | S 6 kph (S 3.5 mph) | - | 10SM |
| | KEUG 050454Z 18003KT 10SM FEW020 M03/M04 A3022 RMK AO2 SLP237 T10331044 |
| 19:54 PST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1023 mb (30.21 in) | SE 7 kph (SE 4.6 mph) | - | 10SM |
| | KEUG 050354Z 14004KT 10SM CLR M02/M04 A3021 RMK AO2 SLP235 T10221039 |
| 18:54 PST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1023 mb (30.21 in) | SW 9 kph (SW 5.8 mph) | - | 10SM |
| | KEUG 050254Z 22005KT 10SM CLR M02/M04 A3021 RMK AO2 SLP236 T10221039 58002 |
| 17:54 PST |  Partly Cloudy | 1°C / 34°F | -2°C / 28°F | 81% | 1023 mb (30.21 in) | Calm | - | 10SM |
| | KEUG 050154Z 00000KT 10SM FEW025 01/M02 A3022 RMK AO2 SLP238 T00061022 |
| 16:54 PST |  Partly Cloudy | 2°C / 36°F | -1°C / 30°F | 81% | 1023 mb (30.21 in) | SSW 6 kph (SSW 3.5 mph) | - | 10SM |
| | KEUG 050054Z 26003KT 10SM FEW025 02/M01 A3022 RMK AO2 SLP237 T00171011 |
| 15:54 PST |  Partly Cloudy | 4°C / 39°F | 0°C / 32°F | 75% | 1023 mb (30.21 in) | Calm | - | 10SM |
| | KEUG 042354Z 00000KT 10SM FEW030 04/00 A3022 RMK AO2 SLP237 T00440000 10056 21011 56005 |
| 14:54 PST |  Partly Cloudy | 5°C / 41°F | 1°C / 34°F | 76% | 1023 mb (30.21 in) | Calm | - | 10SM |
| | KEUG 042254Z 00000KT 10SM FEW030 05/01 A3022 RMK AO2 SLP237 T00500006 |
| 13:54 PST |  Partly Cloudy | 5°C / 41°F | 1°C / 34°F | 76% | 1024 mb (30.24 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KEUG 042154Z 04003KT 10SM FEW020 05/01 A3023 RMK AO2 SLP239 T00500011 |
| 12:54 PST |  Partly Cloudy | 4°C / 39°F | 1°C / 34°F | 81% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KEUG 042054Z 00000KT 10SM FEW001 04/01 A3023 RMK AO2 SLP241 FG FEW001 T00390011 56015 |
| 11:54 PST |  Partly Cloudy | 2°C / 36°F | 1°C / 34°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KEUG 041954Z 00000KT 10SM FEW001 02/01 A3024 RMK AO2 SLP245 FG FEW001 T00170006 |
| 11:38 PST |  Partly Cloudy Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1024 mb (30.24 in) | Calm | - | 3SM |
| | KEUG 041938Z 00000KT 3SM BR SCT001 00/M01 A3025 RMK AO2 TWR VIS 4 FG SCT001 |
| 11:25 PST |  Mostly Cloudy Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1024 mb (30.24 in) | SE 6 kph (SE 3.5 mph) | - | 2SM |
| | KEUG 041925Z 13003KT 2SM BR BKN001 01/M01 A3025 RMK AO2 VIS SW 10 FG BKN001 |
| 11:18 PST |  Mostly Cloudy Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1025 mb (30.27 in) | Calm | - | 1SM |
| | KEUG 041918Z 00000KT 1SM BR BKN001 01/M01 A3026 RMK AO2 VIS SW 10 FG BKN001 RVRNO |
| 10:54 PST |  Obscured Fog | 0°C / 32°F | -2°C / 28°F | 87% | 1025 mb (30.27 in) | Calm | - | M1/4SM |
| | KEUG 041854Z 00000KT M1/4SM FG VV001 00/M02 A3027 RMK AO2 SFC VIS 1/4 SLP253 T00001017 RVRNO |
| 09:54 PST |  Obscured Fog | -1°C / 30°F | -3°C / 27°F | 86% | 1025 mb (30.27 in) | Calm | - | 1/4SM |
| | KEUG 041754Z 00000KT 1/4SM FZFG VV001 M01/M03 A3028 RMK AO2 SLP258 T10111028 11011 21056 53012 RVRNO |
| 08:54 PST |  Obscured Fog | -2°C / 28°F | -4°C / 25°F | 86% | 1025 mb (30.27 in) | Variable 7 kph (Variable 4.6 mph) | - | 1/8SM |
| | KEUG 041654Z VRB04KT 1/8SM FZFG VV001 M02/M04 A3027 RMK AO2 SLP254 T10221044 RVRNO |
| 07:54 PST |  Obscured Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | Calm | - | 1/8SM |
| | KEUG 041554Z 00000KT 1/8SM FZFG VV003 M04/M06 A3025 RMK AO2 SLP250 T10391061 RVRNO |
| 06:54 PST |  Obscured Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | S 6 kph (S 3.5 mph) | - | 1/4SM |
| | KEUG 041454Z 19003KT 1/4SM FZFG VV002 M04/M06 A3024 RMK AO2 SLP246 T10391056 53002 RVRNO $ |
| 05:54 PST |  Obscured Fog | -6°C / 21°F | -7°C / 19°F | 93% | 1024 mb (30.24 in) | Calm | - | 1/4SM |
| | KEUG 041354Z 00000KT 1/4SM FZFG VV002 M06/M07 A3023 RMK AO2 SLP242 VIS 1/8V1 T10561067 RVRNO $ |
| 05:10 PST |  Obscured Fog | -5°C / 23°F | -7°C / 19°F | 86% | 1023 mb (30.21 in) | Calm | - | 1/4SM |
| | KEUG 041310Z 00000KT 1/4SM FZFG VV002 M05/M07 A3022 RMK AO2 VIS 1/8V2 RVRNO |
| 05:05 PST |  Mostly Cloudy Fog And Mist | -6°C / 21°F | -7°C / 19°F | 93% | 1023 mb (30.21 in) | Calm | - | 1SM |
| | KEUG 041305Z 00000KT 1SM BR SCT001 SCT008 BKN100 M06/M07 A3022 RMK AO2 VIS E-SE 1/2 NW 2 BR SCT001 RVRNO |
| 04:54 PST |  Mostly Cloudy Fog | -6°C / 21°F | -7°C / 19°F | 93% | 1023 mb (30.21 in) | S 7 kph (S 4.6 mph) | - | 1/2SM |
| | KEUG 041254Z 17004KT 1/2SM FZFG BKN001 BKN009 BKN100 M06/M07 A3022 RMK AO2 SLP236 VIS 1/8V1 FG BKN001 T10561067 RVRNO |
| 04:44 PST |  Mostly Cloudy Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | Calm | - | 1/4SM |
| | KEUG 041244Z 00000KT 1/4SM FZFG BKN001 BKN009 BKN100 M04/M06 A3023 RMK AO2 FG BKN001 RVRNO |
| 04:39 PST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | Calm | - | 1/2SM |
| | KEUG 041239Z 00000KT 1/2SM FZFG BKN001 OVC009 M04/M06 A3023 RMK AO2 FG BKN001 RVRNO |
| 04:35 PST |  Mostly Cloudy Fog And Mist | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | Calm | - | 2SM |
| | KEUG 041235Z 00000KT 2SM BR FEW001 SCT002 BKN011 M04/M06 A3023 RMK AO2 VIS E-S 1/2 BR FEW001 |
| 03:54 PST |  Partly Cloudy | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | Calm | - | 7SM |
| | KEUG 041154Z 00000KT 7SM FEW003 SCT100 M04/M06 A3024 RMK AO2 SLP243 T10441061 11022 21050 58004 |
| 02:54 PST |  Partly Cloudy | -4°C / 25°F | -6°C / 21°F | 86% | 1025 mb (30.27 in) | Calm | - | 9SM |
| | KEUG 041054Z 00000KT 9SM FEW003 SCT100 M04/M06 A3026 RMK AO2 SLP250 T10441061 |
| 02:24 PST |  Partly Cloudy | -3°C / 27°F | -6°C / 21°F | 80% | 1024 mb (30.24 in) | SW 6 kph (SW 3.5 mph) | - | 9SM |
| | KEUG 041024Z 22003KT 9SM FEW003 SCT080 SCT200 M03/M06 A3025 RMK AO2 |
| 01:54 PST |  Partly Cloudy | -4°C / 25°F | -6°C / 21°F | 86% | 1025 mb (30.27 in) | Calm | - | 9SM |
| | KEUG 040954Z 00000KT 9SM FEW200 M04/M06 A3026 RMK AO2 SLP250 T10441061 |
| 00:54 PST |  Partly Cloudy | -4°C / 25°F | -6°C / 21°F | 86% | 1024 mb (30.24 in) | Calm | - | 9SM |
| | KEUG 040854Z 00000KT 9SM SCT200 M04/M06 A3025 RMK AO2 SLP247 T10391056 52009 |