| 22:17 MST |  Partly Cloudy | -9°C / 16°F | -12°C / 10°F | 79% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KGPI 040517Z AUTO 00000KT 10SM FEW026 M09/M12 A3024 RMK AO2 TSNO $ |
| 21:55 MST |  Overcast | -9°C / 16°F | -11°C / 12°F | 86% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KGPI 040455Z AUTO 00000KT 10SM OVC026 M09/M11 A3024 RMK AO2 SLP290 T10891111 TSNO $ |
| 21:44 MST |  Mostly Cloudy | -9°C / 16°F | -12°C / 10°F | 79% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KGPI 040444Z 00000KT 10SM BKN026 M09/M12 A3024 RMK AO2 $ |
| 20:55 MST |  Clear | -9°C / 16°F | -13°C / 9°F | 73% | 1025 mb (30.27 in) | NE 6 kph (NE 3.5 mph) | - | 9SM |
| | KGPI 040355Z 03003KT 9SM CLR M09/M13 A3026 RMK AO2 SLP296 T10941128 $ |
| 19:55 MST |  Mostly Cloudy | -7°C / 19°F | -11°C / 12°F | 73% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KGPI 040255Z 10SM BKN033 M07/M11 A3029 RMK AO2 SLP304 T10721106 56013 $ |
| 18:55 MST |  Overcast | -7°C / 19°F | -10°C / 14°F | 79% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KGPI 040155Z 00000KT 10SM OVC031 M07/M10 A3029 RMK AO2 SLP310 T10721100 |
| 17:55 MST |  Overcast | -7°C / 19°F | -11°C / 12°F | 73% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KGPI 040055Z 00000KT 10SM OVC031 M07/M11 A3032 RMK AO2 SLP319 T10671106 |
| 16:55 MST |  Partly Cloudy | -7°C / 19°F | -12°C / 10°F | 68% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KGPI 032355Z 00000KT 10SM FEW031 M07/M12 A3033 RMK AO2 SLP325 60000 T10721117 11050 21078 58013 |
| 15:55 MST |  Overcast | -6°C / 21°F | -11°C / 12°F | 68% | 1028 mb (30.36 in) | Calm | - | 10SM |
| | KGPI 032255Z 00000KT 10SM OVC033 M06/M11 A3035 RMK AO2 SLP329 T10561111 |
| 14:55 MST |  Overcast | -5°C / 23°F | -11°C / 12°F | 63% | 1028 mb (30.36 in) | Calm | 0.00 mm (0.00 in) | 10SM |
| | KGPI 032155Z 00000KT 10SM OVC033 M05/M11 A3035 RMK AO2 SNE47 SLP328 P0000 T10501111 |
| 13:55 MST |  Overcast Light Snow | -6°C / 21°F | -11°C / 12°F | 68% | 1028 mb (30.36 in) | Calm | 0.00 mm (0.00 in) | 9SM |
| | KGPI 032055Z 00000KT 9SM -SN OVC035 M06/M11 A3037 RMK AO2 SLP334 P0000 60000 T10561106 56009 |
| 12:55 MST |  Overcast Light Snow | -7°C / 19°F | -11°C / 12°F | 73% | 1028 mb (30.36 in) | Calm | 0.00 mm (0.00 in) | 9SM |
| | KGPI 031955Z 00000KT 9SM -SN OVC035 M07/M11 A3037 RMK AO2 SLP336 P0000 T10671106 |
| 11:55 MST |  Overcast Light Snow | -7°C / 19°F | -11°C / 12°F | 73% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | 0.00 mm (0.00 in) | 9SM |
| | KGPI 031855Z 01003KT 9SM -SN OVC035 M07/M11 A3039 RMK AO2 SLP342 P0000 T10721106 |
| 10:55 MST |  Overcast Light Snow | -8°C / 18°F | -11°C / 12°F | 79% | 1029 mb (30.39 in) | Calm | 0.00 mm (0.00 in) | 9SM |
| | KGPI 031755Z 00000KT 9SM -SN OVC033 M08/M11 A3040 RMK AO2 SLP346 P0000 60000 T10781106 11078 21139 50004 |
| 09:55 MST |  Overcast Light Snow | -9°C / 16°F | -12°C / 10°F | 79% | 1029 mb (30.39 in) | W 7 kph (W 4.6 mph) | 0.00 mm (0.00 in) | 9SM |
| | KGPI 031655Z 27004KT 9SM -SN OVC033 M09/M12 A3040 RMK AO2 SLP350 P0000 T10941122 |
| 08:55 MST |  Overcast Light Snow | -9°C / 16°F | -12°C / 10°F | 79% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | 0.00 mm (0.00 in) | 9SM |
| | KGPI 031555Z 01003KT 9SM -SN OVC031 M09/M12 A3038 RMK AO2 SNB42 SLP341 P0000 T10891117 |
| 08:23 MST |  Overcast | -9°C / 16°F | -12°C / 10°F | 79% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KGPI 031523Z 35003KT 10SM OVC031 M09/M12 A3038 RMK AO2 $ |
| 07:55 MST |  Overcast | -10°C / 14°F | -12°C / 10°F | 85% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KGPI 031455Z 35003KT 10SM OVC029 M10/M12 A3038 RMK AO2 SLP342 T11001122 56003 $ |
| 06:55 MST |  Overcast | -12°C / 10°F | -14°C / 7°F | 85% | 1029 mb (30.39 in) | Calm | - | 10SM |
| | KGPI 031355Z AUTO 00000KT 10SM OVC029 M12/M14 A3039 RMK AO2 SLP344 T11171139 |
| 06:51 MST |  Overcast | -12°C / 10°F | -14°C / 7°F | 85% | 1029 mb (30.39 in) | Calm | - | 10SM |
| | KGPI 031351Z AUTO 00000KT 10SM OVC029 M12/M14 A3039 RMK AO2 |
| 05:55 MST |  Overcast | -13°C / 9°F | -16°C / 3°F | 78% | 1029 mb (30.39 in) | Calm | - | 10SM |
| | KGPI 031255Z AUTO 00000KT 10SM OVC033 M13/M16 A3039 RMK AO2 SLP345 T11281156 |
| 04:55 MST |  Partly Cloudy | -14°C / 7°F | -16°C / 3°F | 85% | 1029 mb (30.39 in) | WNW 6 kph (WNW 3.5 mph) | - | 10SM |
| | KGPI 031155Z AUTO 29003KT 10SM SCT033 M14/M16 A3038 RMK AO2 SLP338 T11391161 11111 21139 50005 |
| 03:55 MST |  Mostly Cloudy | -14°C / 7°F | -16°C / 3°F | 85% | 1029 mb (30.39 in) | Calm | - | 10SM |
| | KGPI 031055Z AUTO 00000KT 10SM BKN046 M14/M16 A3038 RMK AO2 SLP336 T11391161 |
| 02:55 MST |  Clear | -13°C / 9°F | -16°C / 3°F | 78% | 1029 mb (30.39 in) | Calm | - | 10SM |
| | KGPI 030955Z AUTO 00000KT 10SM CLR M13/M16 A3038 RMK AO2 SLP331 T11281156 |
| 01:55 MST |  Clear | -13°C / 9°F | -15°C / 5°F | 85% | 1028 mb (30.36 in) | WNW 7 kph (WNW 4.6 mph) | - | 10SM |
| | KGPI 030855Z AUTO 29004KT 10SM CLR M13/M15 A3036 RMK AO2 SLP328 T11281150 51009 |
| 00:55 MST |  Clear | -13°C / 9°F | -15°C / 5°F | 85% | 1028 mb (30.36 in) | Calm | - | 10SM |
| | KGPI 030755Z AUTO 00000KT 10SM CLR M13/M15 A3036 RMK AO2 SLP327 T11281150 |