| 04:30 MST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 041130Z AUTO 00000KT 10SM CLR M12/M20 A3018 RMK AO2 |
| 04:10 MST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 041110Z AUTO 00000KT 10SM CLR M12/M20 A3018 RMK AO2 |
| 03:50 MST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 041050Z AUTO 00000KT 10SM CLR M12/M20 A3018 RMK AO2 |
| 03:30 MST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 041030Z AUTO 00000KT 10SM CLR M12/M20 A3017 RMK AO2 |
| 03:10 MST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 041010Z AUTO 00000KT 10SM CLR M12/M20 A3017 RMK AO2 |
| 02:50 MST |  Clear | -12°C / 10°F | -19°C / -2°F | 56% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 040950Z AUTO 00000KT 10SM CLR M12/M19 A3017 RMK AO2 |
| 02:30 MST |  Clear | -12°C / 10°F | -20°C / -4°F | 52% | 1022 mb (30.18 in) | Calm | - | 10SM |
| | KSOW 040930Z AUTO 00000KT 10SM CLR M12/M20 A3017 RMK AO2 |
| 02:10 MST |  Clear | -11°C / 12°F | -20°C / -4°F | 48% | 1021 mb (30.15 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSOW 040910Z AUTO 03004KT 10SM CLR M11/M20 A3016 RMK AO2 |
| 01:50 MST |  Clear | -10°C / 14°F | -19°C / -2°F | 48% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KSOW 040850Z AUTO 00000KT 10SM CLR M10/M19 A3016 RMK AO2 |
| 01:30 MST |  Clear | -10°C / 14°F | -19°C / -2°F | 48% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KSOW 040830Z AUTO 00000KT 10SM CLR M10/M19 A3015 RMK AO2 |
| 01:10 MST |  Clear | -11°C / 12°F | -20°C / -4°F | 48% | 1021 mb (30.15 in) | E 11 kph (E 6.9 mph) | - | 10SM |
| | KSOW 040810Z AUTO 08006KT 10SM CLR M11/M20 A3015 RMK AO2 |
| 00:50 MST |  Clear | -11°C / 12°F | -20°C / -4°F | 48% | 1021 mb (30.15 in) | E 9 kph (E 5.8 mph) | - | 10SM |
| | KSOW 040750Z AUTO 08005KT 10SM CLR M11/M20 A3015 RMK AO2 |
| 00:30 MST |  Clear | -11°C / 12°F | -20°C / -4°F | 48% | 1021 mb (30.15 in) | Calm | - | 10SM |
| | KSOW 040730Z AUTO 00000KT 10SM CLR M11/M20 A3015 RMK AO2 |
| 00:10 MST |  Clear | -11°C / 12°F | -19°C / -2°F | 52% | 1021 mb (30.15 in) | ENE 13 kph (ENE 8.1 mph) | - | 10SM |
| | KSOW 040710Z AUTO 07007KT 10SM CLR M11/M19 A3014 RMK AO2 |