| 14:53 PST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1031 mb (30.45 in) | SSW 7 kph (SSW 4.6 mph) | - | 1SM |
| | KPDX 232253Z 25004KT 1SM BR OVC003 01/01 A3045 RMK AO2 SFC VIS 1 1/2 SLP312 T00110006 |
| 14:29 PST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1031 mb (30.45 in) | Calm | - | 1SM |
| | KPDX 232229Z 00000KT 1SM BR OVC003 01/01 A3045 RMK AO2 SFC VIS 2 |
| 14:23 PST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1031 mb (30.45 in) | Calm | - | 3/4SM |
| | KPDX 232223Z 00000KT 3/4SM BR OVC003 01/01 A3046 RMK AO2 SFC VIS 2 1/2 |
| 13:53 PST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1031 mb (30.45 in) | Calm | - | 1 1/2SM |
| | KPDX 232153Z 00000KT 1 1/2SM BR OVC003 01/01 A3046 RMK AO2 SFC VIS 2 SLP313 T00060006 |
| 13:35 PST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1031 mb (30.45 in) | Calm | - | 1SM |
| | KPDX 232135Z 00000KT 1SM BR OVC003 01/01 A3045 RMK AO2 SFC VIS 2 |
| 13:27 PST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1031 mb (30.45 in) | Calm | - | 1/2SM |
| | KPDX 232127Z 00000KT 1/2SM BR OVC003 01/00 A3045 RMK AO2 SFC VIS 2 |
| 12:53 PST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KPDX 232053Z 00000KT 1/4SM R10R/4000VP6000FT BR OVC001 01/01 A3045 RMK AO2 SFC VIS 2 SLP312 T00060006 58011 |
| 11:53 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1032 mb (30.48 in) | Calm | - | 1/8SM |
| | KPDX 231953Z 00000KT 1/8SM R10R/3500VP6000FT FG VV001 00/00 A3047 RMK AO2 SFC VIS 1/2 SLP317 T00000000 |
| 10:53 PST |  Obscured Fog And Mist | 0°C / 32°F | 0°C / 32°F | 100% | 1033 mb (30.5 in) | NNW 6 kph (NNW 3.5 mph) | - | 1/8SM |
| | KPDX 231853Z 34003KT 1/8SM R10R/2600V3500FT BR VV001 00/00 A3049 RMK AO2 SFC VIS 3/4 SLP323 T00000000 |
| 10:49 PST |  Obscured Fog And Mist | 0°C / 32°F | 0°C / 32°F | 100% | 1033 mb (30.5 in) | Calm | - | 1/8SM |
| | KPDX 231849Z 00000KT 1/8SM R10R/1800V2800FT BR VV001 00/00 A3049 RMK AO2 SFC VIS 3/4 |
| 10:18 PST |  Overcast Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1033 mb (30.5 in) | NNW 6 kph (NNW 3.5 mph) | - | 1/8SM |
| | KPDX 231818Z 33003KT 1/8SM R10R/1600V1800FT FG OVC001 00/00 A3049 RMK AO2 SFC VIS 1/2 |
| 09:53 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1033 mb (30.5 in) | Calm | - | 1/8SM |
| | KPDX 231753Z 00000KT 1/8SM R10R/2000V4000FT FG VV001 00/00 A3049 RMK AO2 SFC VIS 1/4 SLP323 T00000000 10000 21006 53008 |
| 08:53 PST |  Overcast Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1032 mb (30.48 in) | Calm | - | 1/8SM |
| | KPDX 231653Z 00000KT 1/8SM R10R/2800V4000FT FG OVC001 00/00 A3048 RMK AO2 SFC VIS 1/2 SLP320 T00000000 |
| 08:14 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1032 mb (30.48 in) | Calm | - | 1/8SM |
| | KPDX 231614Z 00000KT 1/8SM R10R/1600V6000FT FG VV001 00/00 A3047 RMK AO2 |
| 07:53 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1032 mb (30.48 in) | SSW 6 kph (SSW 3.5 mph) | - | 1/8SM |
| | KPDX 231553Z 26003KT 1/8SM R10R/1400V1600FT FG VV001 00/00 A3047 RMK AO2 SLP318 T00000000 |
| 07:13 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1032 mb (30.48 in) | Calm | - | 1/4SM |
| | KPDX 231513Z 00000KT 1/4SM R10R/1800V2200FT FG VV001 00/00 A3047 RMK AO2 |
| 06:53 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KPDX 231453Z 00000KT 1/4SM R10R/2000V2800FT FG VV001 00/00 A3046 RMK AO2 TWR VIS 1 SLP315 T00000000 51009 $ |
| 06:43 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KPDX 231443Z 00000KT 1/4SM R10R/2000FT FG VV001 00/00 A3046 RMK AO2 TWR VIS 1 $ |
| 06:30 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KPDX 231430Z 00000KT 1/4SM R10R/1800V3000FT FG VV001 00/00 A3046 RMK AO2 TWR VIS 1 $ |
| 06:07 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | Calm | - | 1/4SM |
| | KPDX 231407Z 00000KT 1/4SM R10R/1800V2000FT FG VV001 00/00 A3045 RMK AO2 TWR VIS 1 $ |
| 05:53 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | SSW 6 kph (SSW 3.5 mph) | - | 1/4SM |
| | KPDX 231353Z 26003KT 1/4SM R10R/2200V2800FT FG VV001 00/00 A3045 RMK AO2 TWR VIS 1 SLP311 T00000000 $ |
| 05:36 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | SSW 6 kph (SSW 3.5 mph) | - | 1/4SM |
| | KPDX 231336Z 24003KT 1/4SM R10R/1800V2000FT FG VV001 00/00 A3045 RMK AO2 TWR VIS 1 $ |
| 05:21 PST |  Obscured Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1030 mb (30.42 in) | SSW 6 kph (SSW 3.5 mph) | - | 1/4SM |
| | KPDX 231321Z 25003KT 1/4SM R10R/2200V2400FT FG VV001 00/00 A3043 RMK AO2 TWR VIS 1 $ |
| 05:02 PST |  Overcast Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/2SM |
| | KPDX 231302Z 00000KT 1/2SM R10R/3000VP6000FT FG OVC003 00/00 A3043 RMK AO2 TWR VIS 1 1/2 $ |
| 04:53 PST |  Overcast Fog And Mist | 0°C / 32°F | 0°C / 32°F | 100% | 1031 mb (30.45 in) | SSW 9 kph (SSW 5.8 mph) | - | 1SM |
| | KPDX 231253Z 26005KT 1SM R10R/1800V3500FT BR BKN003 OVC028 00/00 A3044 RMK AO2 TWR VIS 1 1/2 SLP305 T00000000 $ |
| 04:03 PST |  Overcast Fog And Mist | 0°C / 32°F | 0°C / 32°F | 100% | 1030 mb (30.42 in) | Calm | - | 2SM |
| | KPDX 231203Z 00000KT 2SM R10R/4500VP6000FT BR BKN003 OVC028 00/00 A3043 RMK AO2 $ |
| 03:53 PST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1030 mb (30.42 in) | Calm | - | 3/4SM |
| | KPDX 231153Z 00000KT 3/4SM BR BKN003 OVC028 00/M01 A3043 RMK AO2 SFC VIS 2 1/2 SLP303 T00001006 10000 21017 50007 $ |
| 03:23 PST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1030 mb (30.42 in) | Calm | - | 3/4SM |
| | KPDX 231123Z 00000KT 3/4SM R10R/P6000FT BR OVC001 M01/M01 A3043 RMK AO2 $ |
| 02:53 PST |  Obscured Fog | -1°C / 30°F | -1°C / 30°F | 100% | 1030 mb (30.42 in) | SSE 6 kph (SSE 3.5 mph) | - | 1/4SM |
| | KPDX 231053Z 16003KT 1/4SM R10R/2800V5500FT FZFG VV001 M01/M01 A3043 RMK AO2 TWR VIS 3/4 SLP304 T10061006 $ |
| 01:53 PST |  Overcast Fog | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KPDX 230953Z 00000KT 1/4SM R10R/2800V4500FT FZFG BKN001 OVC006 M02/M02 A3042 RMK AO2 TWR VIS 3/4 SLP301 FG BKN001 T10171017 $ |
| 01:41 PST |  Overcast Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KPDX 230941Z 00000KT 1/4SM R10R/1800V3000FT FZFG BKN001 OVC006 M01/M02 A3042 RMK AO2 TWR VIS 3/4 FG BKN001 $ |
| 01:29 PST |  Overcast Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KPDX 230929Z 00000KT 1/4SM R10R/1200V1400FT FZFG BKN001 OVC006 M01/M02 A3041 RMK AO2 TWR VIS 3/4 FG BKN001 $ |
| 01:05 PST |  Overcast Fog | -1°C / 30°F | -1°C / 30°F | 100% | 1030 mb (30.42 in) | Calm | - | 1/4SM |
| | KPDX 230905Z 00000KT 1/4SM R10R/1800V2800FT FZFG BKN001 OVC006 M01/M01 A3041 RMK AO2 TWR VIS 3/4 FG BKN001 $ |
| 00:53 PST |  Mostly Cloudy Fog And Mist | -1°C / 30°F | -2°C / 28°F | 93% | 1030 mb (30.42 in) | ESE 6 kph (ESE 3.5 mph) | - | 3/4SM |
| | KPDX 230853Z 11003KT 3/4SM R10R/1600VP6000FT BR SCT003 BKN009 M01/M02 A3041 RMK AO2 TWR VIS 1 SLP296 T10111017 51014 $ |
| 00:49 PST |  Mostly Cloudy Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | E 9 kph (E 5.8 mph) | - | 3/4SM |
| | KPDX 230849Z 10005KT 3/4SM R10R/2600VP6000FT BR SCT003 BKN009 M02/M02 A3041 RMK AO2 TWR VIS 1 $ |
| 00:40 PST |  Partly Cloudy Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1030 mb (30.42 in) | E 6 kph (E 3.5 mph) | - | 1SM |
| | KPDX 230840Z 09003KT 1SM R10R/4500VP6000FT BR FEW003 SCT009 SCT250 M02/M02 A3041 RMK AO2 SFC VIS 2 VIS N 1/2 $ |