| 22:55 MST |  Overcast | -12°C / 10°F | -19°C / -2°F | 56% | N/A | SW 13 kph (SW 8.1 mph) | - | 10SM |
| | KGPI 100555Z 22007KT 10SM OVC046 M12/M19 RMK AO2 SLPNO T11221194 11117 21122 $ |
| 21:55 MST |  Overcast | -12°C / 10°F | -19°C / -2°F | 56% | 1019 mb (30.09 in) | S 7 kph (S 4.6 mph) | - | 10SM |
| | KGPI 100455Z AUTO 19004KT 10SM OVC048 M12/M19 A3008 RMK AO2 SLP247 T11221189 TSNO |
| 20:55 MST |  Overcast | -12°C / 10°F | -19°C / -2°F | 56% | 1019 mb (30.09 in) | SW 11 kph (SW 6.9 mph) | - | 10SM |
| | KGPI 100355Z AUTO 21006KT 10SM OVC048 M12/M19 A3008 RMK AO2 SLP250 T11221194 TSNO |
| 19:55 MST |  Overcast | -12°C / 10°F | -18°C / 0°F | 61% | 1018 mb (30.06 in) | S 9 kph (S 5.8 mph) | - | 10SM |
| | KGPI 100255Z AUTO 18005KT 10SM OVC048 M12/M18 A3007 RMK AO2 SLP244 T11171183 53002 TSNO |
| 18:55 MST |  Overcast | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | S 13 kph (S 8.1 mph) | - | 10SM |
| | KGPI 100155Z AUTO 18007KT 10SM OVC050 M12/M17 A3006 RMK AO2 SLP242 T11221172 TSNO |
| 17:55 MST |  Overcast | -12°C / 10°F | -16°C / 3°F | 72% | 1018 mb (30.06 in) | S 9 kph (S 5.8 mph) | - | 10SM |
| | KGPI 100055Z AUTO 18005KT 10SM OVC050 M12/M16 A3006 RMK AO2 SLP245 T11221161 TSNO |
| 16:55 MST |  Overcast | -12°C / 10°F | -16°C / 3°F | 72% | 1018 mb (30.06 in) | SSE 11 kph (SSE 6.9 mph) | - | 10SM |
| | KGPI 092355Z AUTO 15006KT 10SM OVC050 M12/M16 A3006 RMK AO2 SLP246 60000 T11221161 11117 21156 53005 TSNO |
| 16:02 MST |  Overcast | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | S 9 kph (S 5.8 mph) | - | 9SM |
| | KGPI 092302Z 18005KT 9SM OVC055 M12/M17 A3006 RMK AO2 |
| 15:55 MST |  Overcast Hazy | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | SSE 9 kph (SSE 5.8 mph) | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 092255Z 15005KT 2 1/2SM HZ FEW036 OVC055 M12/M17 A3006 RMK AO2 SNE12 SLP242 P0000 T11171167 |
| 15:31 MST |  Overcast Hazy | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | S 9 kph (S 5.8 mph) | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 092231Z 18005KT 2 1/2SM HZ SCT032 OVC055 M12/M17 A3005 RMK AO2 SNE12 P0000 |
| 14:55 MST |  Overcast Light Snow | -12°C / 10°F | -18°C / 0°F | 61% | 1018 mb (30.06 in) | SSE 9 kph (SSE 5.8 mph) | 0.00 mm (0.00 in) | 9SM |
| | KGPI 092155Z 16005KT 9SM -SN SCT030 SCT037 OVC055 M12/M18 A3005 RMK AO2 SLP238 P0000 T11171178 |
| 14:15 MST |  Overcast Light Snow | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | S 11 kph (S 6.9 mph) | 0.00 mm (0.00 in) | 6SM |
| | KGPI 092115Z 18006KT 6SM -SN SCT025 OVC055 M12/M17 A3005 RMK AO2 P0000 |
| 14:04 MST |  Overcast Light Snow | -12°C / 10°F | -17°C / 1°F | 67% | 1017 mb (30.03 in) | SSE 9 kph (SSE 5.8 mph) | 0.00 mm (0.00 in) | 2SM |
| | KGPI 092104Z 16005KT 2SM -SN SCT027 BKN036 OVC055 M12/M17 A3004 RMK AO2 VIS 1 1/4V4 P0000 |
| 14:01 MST |  Overcast Light Snow | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | SSE 11 kph (SSE 6.9 mph) | 0.00 mm (0.00 in) | 1 1/2SM |
| | KGPI 092101Z 15006KT 1 1/2SM -SN SCT025 BKN030 OVC055 M12/M17 A3005 RMK AO2 VIS 1V3 P0000 |
| 13:55 MST |  Overcast Light Snow | -12°C / 10°F | -17°C / 1°F | 67% | 1017 mb (30.03 in) | S 9 kph (S 5.8 mph) | 0.00 mm (0.00 in) | 2SM |
| | KGPI 092055Z 17005KT 2SM -SN BKN028 BKN036 OVC055 M12/M17 A3004 RMK AO2 SNB45 SLP239 P0000 60000 T11221167 56006 |
| 13:52 MST |  Overcast Light Snow | -12°C / 10°F | -17°C / 1°F | 67% | 1017 mb (30.03 in) | SSE 11 kph (SSE 6.9 mph) | 0.00 mm (0.00 in) | 2SM |
| | KGPI 092052Z 16006KT 2SM -SN BKN028 BKN036 OVC055 M12/M17 A3004 RMK AO2 SNB45 P0000 |
| 13:02 MST |  Overcast | -12°C / 10°F | -17°C / 1°F | 67% | 1018 mb (30.06 in) | S 11 kph (S 6.9 mph) | - | 10SM |
| | KGPI 092002Z 18006KT 10SM SCT015 OVC050 M12/M17 A3005 RMK AO2 SCT V BKN |
| 12:55 MST |  Overcast | -13°C / 9°F | -17°C / 1°F | 72% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 10SM |
| | KGPI 091955Z 00000KT 10SM OVC050 M13/M17 A3005 RMK AO2 SNE1857 SLP243 P0000 T11281172 |
| 12:14 MST |  Partly Cloudy Hazy | -13°C / 9°F | -17°C / 1°F | 72% | 1018 mb (30.06 in) | SSE 7 kph (SSE 4.6 mph) | 0.00 mm (0.00 in) | 6SM |
| | KGPI 091914Z 15004KT 6SM HZ FEW022 M13/M17 A3005 RMK AO2 SNE1857 P0000 |
| 11:55 MST |  Mostly Cloudy Light Snow | -14°C / 7°F | -17°C / 1°F | 78% | 1018 mb (30.06 in) | SSE 6 kph (SSE 3.5 mph) | 0.00 mm (0.00 in) | 3SM |
| | KGPI 091855Z 15003KT 3SM -SN BKN015 BKN025 M14/M17 A3006 RMK AO2 VIS 2 NE SLP250 P0000 T11391172 |
| 11:50 MST |  Overcast Light Snow | -14°C / 7°F | -17°C / 1°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 3SM |
| | KGPI 091850Z 00000KT 3SM -SN BKN015 OVC025 M14/M17 A3007 RMK AO2 VIS 1 3/4 NE P0000 |
| 11:44 MST |  Overcast Light Snow | -14°C / 7°F | -18°C / 0°F | 72% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 091844Z 00000KT 2 1/2SM -SN BKN013 OVC025 M14/M18 A3007 RMK AO2 VIS 1 1/2 NE P0000 |
| 11:22 MST |  Overcast Light Snow | -15°C / 5°F | -18°C / 0°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 3SM |
| | KGPI 091822Z 00000KT 3SM -SN OVC015 M15/M18 A3007 RMK AO2 P0000 |
| 11:17 MST |  Overcast Light Snow | -15°C / 5°F | -18°C / 0°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 091817Z 00000KT 2 1/2SM -SN OVC013 M15/M18 A3007 RMK AO2 P0000 |
| 11:07 MST |  Overcast Light Snow | -15°C / 5°F | -18°C / 0°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 1 1/2SM |
| | KGPI 091807Z 00000KT 1 1/2SM -SN OVC011 M15/M18 A3007 RMK AO2 P0000 |
| 10:55 MST |  Obscured Light Snow | -16°C / 3°F | -18°C / 0°F | 85% | 1018 mb (30.06 in) | Calm | 0.25 mm (0.01 in) | 1SM |
| | KGPI 091755Z 00000KT 1SM -SN VV010 M16/M18 A3007 RMK AO2 SLP257 P0001 60002 T11561183 11156 21183 50004 |
| 10:31 MST |  Overcast Light Snow | -16°C / 3°F | -19°C / -2°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 1 1/4SM |
| | KGPI 091731Z 00000KT 1 1/4SM -SN OVC012 M16/M19 A3007 RMK AO2 P0000 |
| 10:09 MST |  Overcast Light Snow | -16°C / 3°F | -19°C / -2°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 1 1/2SM |
| | KGPI 091709Z 00000KT 1 1/2SM -SN OVC014 M16/M19 A3007 RMK AO2 P0000 |
| 09:55 MST |  Overcast Light Snow | -16°C / 3°F | -19°C / -2°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091655Z 00000KT 2SM -SN FEW005 BKN014 OVC022 M16/M19 A3007 RMK AO2 SLP261 P0000 T11611194 |
| 09:30 MST |  Overcast Light Snow | -16°C / 3°F | -19°C / -2°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091630Z 00000KT 2SM -SN FEW005 BKN014 OVC034 M16/M19 A3007 RMK AO2 P0000 |
| 08:55 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091555Z 00000KT 2SM -SN BKN014 OVC034 M17/M19 A3007 RMK AO2 SLP260 P0000 T11671194 |
| 08:39 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091539Z 00000KT 2SM -SN BKN014 OVC032 M17/M19 A3006 RMK AO2 P0000 |
| 08:09 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091509Z 00000KT 2SM -SN BKN024 OVC032 M17/M19 A3006 RMK AO2 P0000 |
| 08:02 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091502Z 00000KT 2SM -SN SCT024 OVC032 M17/M19 A3006 RMK AO2 P0000 |
| 08:01 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 3SM |
| | KGPI 091501Z 00000KT 3SM -SN SCT024 OVC032 M17/M19 A3006 RMK AO2 P0000 |
| 07:55 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091455Z 00000KT 2SM -SN BKN022 OVC032 M17/M19 A3006 RMK AO2 SLP254 P0000 60001 T11671194 53002 |
| 07:40 MST |  Overcast Light Snow | -17°C / 1°F | -19°C / -2°F | 85% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 091440Z AUTO 00000KT 2SM -SN SCT018 OVC032 M17/M19 A3006 RMK AO2 P0000 |
| 06:55 MST |  Overcast Light Snow | -17°C / 1°F | -20°C / -4°F | 78% | 1018 mb (30.06 in) | Calm | 0.25 mm (0.01 in) | 2 1/2SM |
| | KGPI 091355Z AUTO 00000KT 2 1/2SM -SN BKN016 OVC031 M17/M20 A3005 RMK AO2 SNB1258 SLP252 P0001 T11671200 |
| 06:12 MST |  Overcast Light Snow | -17°C / 1°F | -21°C / -6°F | 71% | 1017 mb (30.03 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 091312Z AUTO 00000KT 2 1/2SM -SN OVC018 M17/M21 A3004 RMK AO2 SNB1258 P0000 $ |
| 05:55 MST |  Overcast Hazy | -17°C / 1°F | -21°C / -6°F | 71% | 1018 mb (30.06 in) | Calm | - | 5SM |
| | KGPI 091255Z AUTO 00000KT 5SM HZ OVC022 M17/M21 A3005 RMK AO2 SLP244 T11721206 $ |
| 05:24 MST |  Overcast Hazy | -18°C / 0°F | -21°C / -6°F | 78% | 1017 mb (30.03 in) | Calm | - | 6SM |
| | KGPI 091224Z AUTO 00000KT 6SM HZ BKN026 BKN037 OVC047 M18/M21 A3004 RMK AO2 $ |
| 04:55 MST |  Overcast | -18°C / 0°F | -21°C / -6°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 10SM |
| | KGPI 091155Z AUTO 00000KT 10SM SCT036 BKN043 OVC070 M18/M21 A3005 RMK AO2 SNB20E32 SLP246 P0000 60000 T11831211 11172 21206 55001 $ |
| 04:35 MST |  Overcast Hazy | -18°C / 0°F | -21°C / -6°F | 78% | 1018 mb (30.06 in) | Calm | 0.00 mm (0.00 in) | 6SM |
| | KGPI 091135Z AUTO 00000KT 6SM HZ SCT034 BKN042 OVC060 M18/M21 A3005 RMK AO2 SNB20E32 P0000 $ |
| 04:15 MST |  Overcast Hazy | -17°C / 1°F | -21°C / -6°F | 71% | 1018 mb (30.06 in) | Calm | - | 2 1/2SM |
| | KGPI 091115Z AUTO 00000KT 2 1/2SM HZ SCT024 OVC036 M17/M21 A3005 RMK AO2 $ |
| 04:09 MST |  Overcast Hazy | -18°C / 0°F | -22°C / -8°F | 71% | 1018 mb (30.06 in) | Calm | - | 4SM |
| | KGPI 091109Z AUTO 00000KT 4SM HZ BKN026 OVC038 M18/M22 A3005 RMK AO2 VIS 2 1/2 NE $ |
| 03:55 MST |  Overcast | -18°C / 0°F | -22°C / -8°F | 71% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KGPI 091055Z AUTO 00000KT 10SM BKN034 OVC041 M18/M22 A3005 RMK AO2 SLP242 T11781217 $ |
| 02:55 MST |  Overcast | -18°C / 0°F | -22°C / -8°F | 71% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KGPI 090955Z AUTO 00000KT 10SM FEW024 OVC055 M18/M22 A3005 RMK AO2 SLP243 T11781217 $ |
| 02:19 MST |  Overcast | -18°C / 0°F | -22°C / -8°F | 71% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KGPI 090919Z AUTO 00000KT 10SM FEW020 SCT050 OVC070 M18/M22 A3005 RMK AO2 TSNO $ |
| 01:55 MST |  Overcast | -18°C / 0°F | -22°C / -8°F | 71% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KGPI 090855Z AUTO 00000KT 10SM BKN018 OVC090 M18/M22 A3005 RMK AO2 SLP245 T11831222 56009 $ |
| 01:10 MST |  Overcast | -19°C / -2°F | -23°C / -9°F | 71% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KGPI 090810Z AUTO 00000KT 10SM BKN022 OVC090 M19/M23 A3006 RMK AO2 $ |
| 00:55 MST |  Overcast | -19°C / -2°F | -23°C / -9°F | 71% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KGPI 090755Z AUTO 00000KT 10SM SCT020 OVC090 M19/M23 A3006 RMK AO2 SLP248 T11891228 $ |