| 14:53 PST |  Overcast Light Rain | 4°C / 39°F | 2°C / 36°F | 87% | 1023 mb (30.21 in) | Calm | 0.00 mm (0.00 in) | 3SM |
| | KBFI 042253Z 00000KT 3SM -RA BKN014 BKN029 OVC050 04/02 A3022 RMK AO2 RAB36 SLP234 P0000 T00440017 |
| 13:53 PST |  Overcast Hazy | 4°C / 39°F | 1°C / 34°F | 81% | 1023 mb (30.21 in) | Calm | - | 5SM |
| | KBFI 042153Z 00000KT 5SM HZ OVC065 04/01 A3021 RMK AO2 SLP228 T00390011 |
| 13:16 PST |  Partly Cloudy Fog And Mist | 3°C / 37°F | 1°C / 34°F | 87% | 1023 mb (30.21 in) | SSE 7 kph (SSE 4.6 mph) | - | 4SM |
| | KBFI 042116Z 16004KT 4SM BR FEW010 SCT065 03/01 A3020 RMK AO2 |
| 13:06 PST |  Mostly Cloudy Fog And Mist | 3°C / 37°F | 1°C / 34°F | 87% | 1023 mb (30.21 in) | SSE 6 kph (SSE 3.5 mph) | - | 4SM |
| | KBFI 042106Z 16003KT 4SM BR BKN010 03/01 A3021 RMK AO2 CIG 008V012 |
| 12:53 PST |  Overcast Fog And Mist | 3°C / 37°F | 1°C / 34°F | 87% | 1023 mb (30.21 in) | SSE 6 kph (SSE 3.5 mph) | - | 3SM |
| | KBFI 042053Z 15003KT 3SM BR OVC008 03/01 A3022 RMK AO2 CIG 006V012 SLP231 T00280011 56008 |
| 11:53 PST |  Overcast Fog And Mist | 2°C / 36°F | 0°C / 32°F | 87% | 1023 mb (30.21 in) | SSE 13 kph (SSE 8.1 mph) | - | 2 1/2SM |
| | KBFI 041953Z 15007KT 2 1/2SM BR OVC006 02/00 A3022 RMK AO2 SLP232 T00170000 |
| 10:53 PST |  Overcast Fog And Mist | 2°C / 36°F | 1°C / 34°F | 93% | 1024 mb (30.24 in) | SSE 13 kph (SSE 8.1 mph) | - | 2SM |
| | KBFI 041853Z 15007KT 2SM BR OVC004 02/01 A3023 RMK AO2 SLP237 T00220006 |
| 10:24 PST |  Overcast Fog And Mist | 2°C / 36°F | 0°C / 32°F | 87% | 1024 mb (30.24 in) | SSE 9 kph (SSE 5.8 mph) | - | 2SM |
| | KBFI 041824Z 16005KT 2SM BR OVC004 02/00 A3024 RMK AO2 |
| 09:53 PST |  Overcast Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1024 mb (30.24 in) | SSE 15 kph (SSE 9.2 mph) | - | 4SM |
| | KBFI 041753Z 15008KT 4SM BR OVC004 01/M01 A3024 RMK AO2 SLP239 T00061011 10011 21028 53004 |
| 09:00 PST |  Overcast Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1024 mb (30.24 in) | SSE 6 kph (SSE 3.5 mph) | - | 2SM |
| | KBFI 041700Z 16003KT 2SM BR OVC004 01/M01 A3024 RMK AO2 |
| 08:53 PST |  Overcast Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1024 mb (30.24 in) | S 7 kph (S 4.6 mph) | - | 1 1/2SM |
| | KBFI 041653Z 17004KT 1 1/2SM BR OVC004 01/M01 A3024 RMK AO2 SLP239 T00061011 |
| 07:53 PST |  Overcast Fog And Mist | -1°C / 30°F | -2°C / 28°F | 93% | 1023 mb (30.21 in) | SE 9 kph (SE 5.8 mph) | - | 6SM |
| | KBFI 041553Z 13005KT 6SM BR OVC004 M01/M02 A3022 RMK AO2 SLP233 T10061022 |
| 07:31 PST |  Overcast | 0°C / 32°F | -2°C / 28°F | 87% | 1024 mb (30.24 in) | SSE 6 kph (SSE 3.5 mph) | - | 7SM |
| | KBFI 041531Z 15003KT 7SM OVC004 00/M02 A3023 RMK AO2 |
| 06:53 PST |  Mostly Cloudy Fog And Mist | -2°C / 28°F | -3°C / 27°F | 93% | 1024 mb (30.24 in) | Calm | - | 6SM |
| | KBFI 041453Z 00000KT 6SM BR BKN006 M02/M03 A3023 RMK AO2 SLP235 T10171033 55003 |
| 06:40 PST |  Mostly Cloudy Fog And Mist | -2°C / 28°F | -4°C / 25°F | 86% | 1023 mb (30.21 in) | SE 6 kph (SE 3.5 mph) | - | 6SM |
| | KBFI 041440Z 13003KT 6SM BR BKN006 M02/M04 A3022 RMK AO2 |
| 05:53 PST |  Clear Fog And Mist | -2°C / 28°F | -3°C / 27°F | 93% | 1023 mb (30.21 in) | SE 6 kph (SE 3.5 mph) | - | 6SM |
| | KBFI 041353Z 12003KT 6SM BR CLR M02/M03 A3022 RMK AO2 SLP234 T10171033 |
| 04:53 PST |  Partly Cloudy | -3°C / 27°F | -4°C / 25°F | 93% | 1024 mb (30.24 in) | SE 11 kph (SE 6.9 mph) | - | 7SM |
| | KBFI 041253Z 14006KT 7SM FEW030 M03/M04 A3023 RMK AO2 SLP236 T10281044 |
| 03:53 PST |  Clear Fog And Mist | -2°C / 28°F | -4°C / 25°F | 86% | 1024 mb (30.24 in) | Calm | - | 5SM |
| | KBFI 041153Z 00000KT 5SM BR CLR M02/M04 A3024 RMK AO2 SLP238 T10221039 10011 21028 58001 |
| 02:53 PST |  Clear Fog And Mist | -1°C / 30°F | -3°C / 27°F | 86% | 1024 mb (30.24 in) | Calm | - | 5SM |
| | KBFI 041053Z 00000KT 5SM BR CLR M01/M03 A3024 RMK AO2 SLP240 T10111033 |
| 01:53 PST |  Partly Cloudy | -1°C / 30°F | -3°C / 27°F | 86% | 1024 mb (30.24 in) | Calm | - | 7SM |
| | KBFI 040953Z 00000KT 7SM FEW008 M01/M03 A3024 RMK AO2 SLP240 T10061028 |
| 00:53 PST |  Clear Fog And Mist | 0°C / 32°F | -2°C / 28°F | 87% | 1024 mb (30.24 in) | Calm | - | 6SM |
| | KBFI 040853Z 00000KT 6SM BR CLR 00/M02 A3024 RMK AO2 SLP238 T00001022 50003 |