| 02:53 MST |  Partly Cloudy | -12°C / 10°F | -14°C / 7°F | 85% | 1024 mb (30.24 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KBYI 250953Z AUTO 08003KT 10SM FEW008 M12/M14 A3023 RMK AO2 SLP279 T11171139 |
| 02:39 MST |  Partly Cloudy Fog And Mist | -11°C / 12°F | -13°C / 9°F | 85% | 1024 mb (30.24 in) | Calm | - | 5SM |
| | KBYI 250939Z AUTO 00000KT 5SM BR FEW001 SCT010 M11/M13 A3023 RMK AO2 |
| 02:31 MST |  Partly Cloudy Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | Calm | - | 2SM |
| | KBYI 250931Z AUTO 00000KT 2SM BR SCT001 SCT010 M11/M12 A3023 RMK AO2 |
| 02:28 MST |  Partly Cloudy Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | Calm | - | 1 1/4SM |
| | KBYI 250928Z AUTO 00000KT 1 1/4SM BR SCT001 SCT010 M11/M12 A3023 RMK AO2 |
| 02:19 MST |  Partly Cloudy Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | Calm | - | 3/4SM |
| | KBYI 250919Z AUTO 00000KT 3/4SM BR SCT001 SCT010 M11/M12 A3023 RMK AO2 |
| 02:12 MST |  Obscured Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | ENE 7 kph (ENE 4.6 mph) | - | 3/4SM |
| | KBYI 250912Z AUTO 07004KT 3/4SM BR VV001 M11/M12 A3023 RMK AO2 |
| 02:10 MST |  Partly Cloudy Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | ENE 6 kph (ENE 3.5 mph) | - | 1 1/4SM |
| | KBYI 250910Z AUTO 07003KT 1 1/4SM BR SCT001 M11/M12 A3023 RMK AO2 |
| 02:06 MST |  Partly Cloudy Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | ENE 7 kph (ENE 4.6 mph) | - | 2 1/2SM |
| | KBYI 250906Z AUTO 07004KT 2 1/2SM BR FEW001 M11/M12 A3023 RMK AO2 |
| 01:53 MST |  Clear Fog And Mist | -11°C / 12°F | -12°C / 10°F | 92% | 1024 mb (30.24 in) | ENE 7 kph (ENE 4.6 mph) | - | 6SM |
| | KBYI 250853Z AUTO 06004KT 6SM BR CLR M11/M12 A3023 RMK AO2 SLP277 T11061122 55006 |
| 00:53 MST |  Clear | -10°C / 14°F | -12°C / 10°F | 85% | 1023 mb (30.21 in) | NNW 6 kph (NNW 3.5 mph) | - | 7SM |
| | KBYI 250753Z AUTO 33003KT 7SM CLR M10/M12 A3022 RMK AO2 SLP275 T11001122 |