| 03:53 PST |  Clear | -1°C / 30°F | -2°C / 28°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KTIW 041153Z AUTO 00000KT 10SM CLR M01/M02 A3023 RMK AO2 SLP240 T10111017 10028 21011 50003 |
| 02:53 PST |  Clear | 0°C / 32°F | -1°C / 30°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KTIW 041053Z AUTO 00000KT 10SM CLR 00/M01 A3023 RMK AO2 SLP240 T00001006 |
| 02:39 PST |  Clear Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1024 mb (30.24 in) | SSW 6 kph (SSW 3.5 mph) | - | 3SM |
| | KTIW 041039Z AUTO 25003KT 3SM BR CLR 01/00 A3023 RMK AO2 |
| 02:25 PST |  Clear Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1024 mb (30.24 in) | Calm | - | 3/4SM |
| | KTIW 041025Z AUTO 00000KT 3/4SM BR CLR 00/M01 A3024 RMK AO2 |
| 02:14 PST |  Clear Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1024 mb (30.24 in) | Calm | - | 2SM |
| | KTIW 041014Z AUTO 00000KT 2SM BR CLR 01/M01 A3023 RMK AO2 VIS 1 1/4V4 |
| 01:53 PST |  Partly Cloudy Fog | 1°C / 34°F | 1°C / 34°F | 100% | 1024 mb (30.24 in) | Calm | - | 1/2SM |
| | KTIW 040953Z AUTO 00000KT 1/2SM FG FEW001 SCT008 01/01 A3023 RMK AO2 SLP239 T00060006 |
| 01:50 PST |  Obscured Fog | 1°C / 34°F | 0°C / 32°F | 93% | 1024 mb (30.24 in) | Calm | - | 1/2SM |
| | KTIW 040950Z AUTO 00000KT 1/2SM FG VV003 01/00 A3023 RMK AO2 |
| 01:42 PST |  Mostly Cloudy Fog | 0°C / 32°F | -1°C / 30°F | 93% | 1024 mb (30.24 in) | NNW 6 kph (NNW 3.5 mph) | - | 1/4SM |
| | KTIW 040942Z AUTO 34003KT 1/4SM FG BKN006 BKN075 00/M01 A3023 RMK AO2 |
| 01:29 PST |  Obscured Fog | -1°C / 30°F | -1°C / 30°F | 100% | 1023 mb (30.21 in) | Calm | - | 1/4SM |
| | KTIW 040929Z AUTO 00000KT 1/4SM FZFG VV004 M01/M01 A3022 RMK AO2 |
| 01:26 PST |  Obscured Fog | -1°C / 30°F | -1°C / 30°F | 100% | 1023 mb (30.21 in) | Calm | - | 1/4SM |
| | KTIW 040926Z AUTO 00000KT 1/4SM FZFG VV011 M01/M01 A3022 RMK AO2 |
| 01:23 PST |  Obscured Fog And Mist | 0°C / 32°F | 0°C / 32°F | 100% | 1023 mb (30.21 in) | Calm | - | 3/4SM |
| | KTIW 040923Z AUTO 00000KT 3/4SM BR VV019 00/00 A3022 RMK AO2 VIS 1/4V4 |
| 01:08 PST |  Partly Cloudy Fog And Mist | 0°C / 32°F | 0°C / 32°F | 100% | 1023 mb (30.21 in) | Calm | - | 1SM |
| | KTIW 040908Z AUTO 00000KT 1SM BR SCT080 00/00 A3022 RMK AO2 |
| 00:53 PST |  Mostly Cloudy Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1023 mb (30.21 in) | Calm | - | 1/2SM |
| | KTIW 040853Z AUTO 00000KT 1/2SM FG FEW001 BKN080 00/00 A3022 RMK AO2 SLP236 T00000000 58000 |
| 00:28 PST |  Partly Cloudy Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1024 mb (30.24 in) | NNW 6 kph (NNW 3.5 mph) | - | 1/4SM |
| | KTIW 040828Z AUTO 34003KT 1/4SM FG FEW007 SCT033 00/00 A3023 RMK AO2 |
| 00:09 PST |  Partly Cloudy Fog | 0°C / 32°F | 0°C / 32°F | 100% | 1024 mb (30.24 in) | Calm | - | 1/2SM |
| | KTIW 040809Z AUTO 00000KT 1/2SM FG FEW095 00/00 A3023 RMK AO2 |