| 11:55 MST |  Partly Cloudy Fog And Mist | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | - | 3SM |
| | KGPI 221855Z 00000KT 3SM BR SCT001 02/02 A2978 RMK AO2 SLP104 T00220017 |
| 11:42 MST |  Partly Cloudy Fog And Mist | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 3SM |
| | KGPI 221842Z 00000KT 3SM BR SCT001 02/01 A2977 RMK AO2 |
| 11:28 MST |  Overcast Fog | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 1/4SM |
| | KGPI 221828Z 00000KT 1/4SM FG BKN001 OVC034 02/01 A2978 RMK AO2 |
| 11:19 MST |  Overcast Fog | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 1/4SM |
| | KGPI 221819Z 00000KT 1/4SM FG BKN003 BKN034 OVC110 02/01 A2977 RMK AO2 |
| 11:11 MST |  Overcast Fog | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 1/4SM |
| | KGPI 221811Z 00000KT 1/4SM FG FEW001 BKN033 OVC110 02/01 A2977 RMK AO2 |
| 11:06 MST |  Overcast Fog | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 1/2SM |
| | KGPI 221806Z 00000KT 1/2SM FG SCT001 BKN031 OVC110 02/01 A2977 RMK AO2 |
| 11:01 MST |  Mostly Cloudy Fog And Mist | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 3/4SM |
| | KGPI 221801Z 00000KT 3/4SM BR FEW001 BKN031 BKN110 02/01 A2977 RMK AO2 |
| 10:55 MST |  Mostly Cloudy Fog And Mist | 2°C / 36°F | 1°C / 34°F | 93% | 1008 mb (29.77 in) | Calm | - | 1 1/2SM |
| | KGPI 221755Z 00000KT 1 1/2SM BR FEW003 BKN031 BKN110 02/01 A2977 RMK AO2 SLP102 60000 T00170011 10017 20000 51018 |
| 10:41 MST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1008 mb (29.77 in) | Calm | - | 2 1/2SM |
| | KGPI 221741Z 00000KT 2 1/2SM BR SCT003 OVC031 01/01 A2977 RMK AO2 VIS 1 NE |
| 10:34 MST |  Overcast Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1008 mb (29.77 in) | Calm | - | 1 3/4SM |
| | KGPI 221734Z 00000KT 1 3/4SM BR SCT003 OVC029 01/01 A2977 RMK AO2 VIS 1 NE |
| 10:16 MST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1008 mb (29.77 in) | SSW 6 kph (SSW 3.5 mph) | - | 1 1/4SM |
| | KGPI 221716Z 26003KT 1 1/4SM BR FEW003 OVC027 01/00 A2976 RMK AO2 |
| 09:55 MST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1008 mb (29.77 in) | Calm | 0.00 mm (0.00 in) | 1 1/2SM |
| | KGPI 221655Z 00000KT 1 1/2SM BR OVC027 01/00 A2976 RMK AO2 RAB1558E23 SLP098 P0000 T00110000 |
| 08:55 MST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1007 mb (29.74 in) | Calm | - | 1 1/2SM |
| | KGPI 221555Z 00000KT 1 1/2SM BR OVC006 01/00 A2974 RMK AO2 CIG 005V008 SLP094 T00110000 |
| 07:55 MST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1006 mb (29.71 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 221455Z 00000KT 2 1/2SM BR BKN008 OVC018 01/00 A2972 RMK AO2 RAE04 SLP083 P0000 60000 T00110000 53011 |
| 07:26 MST |  Overcast Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1006 mb (29.71 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 221426Z AUTO 00000KT 2 1/2SM BR BKN006 OVC020 01/00 A2970 RMK AO2 RAE04 P0000 |
| 06:55 MST |  Overcast Light Rain | 1°C / 34°F | 0°C / 32°F | 93% | 1006 mb (29.71 in) | Calm | 0.00 mm (0.00 in) | 4SM |
| | KGPI 221355Z AUTO 00000KT 4SM -RA BR OVC006 01/00 A2970 RMK AO2 RAB54 SLP078 P0000 T00110000 |
| 05:55 MST |  Overcast Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1005 mb (29.68 in) | Calm | - | 3SM |
| | KGPI 221255Z AUTO 00000KT 3SM BR OVC008 01/M01 A2968 RMK AO2 CIG 006V010 SLP073 T00061006 |
| 05:45 MST |  Overcast Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1005 mb (29.68 in) | Calm | - | 3SM |
| | KGPI 221245Z AUTO 00000KT 3SM BR OVC008 01/M01 A2968 RMK AO2 CIG 006V011 |
| 05:28 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | - | 2SM |
| | KGPI 221228Z AUTO 00000KT 2SM BR FEW001 OVC010 00/M01 A2968 RMK AO2 |
| 05:13 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | - | 1 1/4SM |
| | KGPI 221213Z AUTO 00000KT 1 1/4SM BR SCT001 OVC012 00/M01 A2968 RMK AO2 |
| 04:55 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 221155Z AUTO 00000KT 2 1/2SM BR FEW001 OVC012 00/M01 A2968 RMK AO2 UPB01E29 SLP070 P0000 60000 70007 T00001006 10011 21006 51009 |
| 04:39 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 221139Z AUTO 00000KT 2SM BR FEW001 BKN014 OVC046 00/M01 A2968 RMK AO2 UPB01E29 P0000 |
| 04:23 MST |  Overcast Unknown Precip | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | 0.00 mm (0.00 in) | 2 1/2SM |
| | KGPI 221123Z AUTO 00000KT 2 1/2SM UP BR FEW001 SCT013 OVC046 00/M01 A2967 RMK AO2 UPB01 P0000 |
| 04:12 MST |  Overcast Unknown Precip | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | 0.00 mm (0.00 in) | 3SM |
| | KGPI 221112Z AUTO 00000KT 3SM UP BR FEW001 BKN013 OVC050 00/M01 A2967 RMK AO2 UPB01 P0000 |
| 03:55 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1005 mb (29.68 in) | Calm | - | 3SM |
| | KGPI 221055Z AUTO 00000KT 3SM BR FEW011 BKN050 OVC065 00/M01 A2967 RMK AO2 SLP067 T00001006 |
| 02:55 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1004 mb (29.65 in) | Calm | 0.00 mm (0.00 in) | 3SM |
| | KGPI 220955Z AUTO 00000KT 3SM BR FEW001 BKN047 OVC080 00/M01 A2966 RMK AO2 UPB25E49RAB49E51 SLP063 P0000 T00001006 |
| 02:36 MST |  Overcast Unknown Precip | 0°C / 32°F | -1°C / 30°F | 93% | 1004 mb (29.65 in) | Calm | 0.00 mm (0.00 in) | 2SM |
| | KGPI 220936Z AUTO 00000KT 2SM UP BR FEW001 SCT031 OVC049 00/M01 A2966 RMK AO2 UPB25 P0000 |
| 02:19 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1004 mb (29.65 in) | NE 6 kph (NE 3.5 mph) | - | 2 1/2SM |
| | KGPI 220919Z AUTO 05003KT 2 1/2SM BR FEW028 OVC049 00/M01 A2965 RMK AO2 |
| 02:10 MST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1004 mb (29.65 in) | ENE 7 kph (ENE 4.6 mph) | - | 1 1/2SM |
| | KGPI 220910Z AUTO 06004KT 1 1/2SM BR BKN047 BKN055 OVC090 M01/M01 A2965 RMK AO2 |
| 02:02 MST |  Overcast Fog And Mist | -1°C / 30°F | -1°C / 30°F | 100% | 1004 mb (29.65 in) | Calm | - | 3/4SM |
| | KGPI 220902Z AUTO 00000KT 3/4SM BR SCT043 BKN055 OVC090 M01/M01 A2965 RMK AO2 |
| 01:55 MST |  Overcast Fog And Mist | -1°C / 30°F | -2°C / 28°F | 93% | 1004 mb (29.65 in) | Calm | - | 1SM |
| | KGPI 220855Z AUTO 00000KT 1SM BR SCT043 OVC095 M01/M02 A2965 RMK AO2 SLP060 T10061017 56001 |
| 01:47 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1004 mb (29.65 in) | Calm | - | 1SM |
| | KGPI 220847Z 00000KT 1SM BR FEW070 OVC095 00/M01 A2965 RMK AO2 |
| 01:13 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1004 mb (29.65 in) | Calm | - | 1 1/2SM |
| | KGPI 220813Z 00000KT 1 1/2SM BR SCT028 OVC080 00/M01 A2965 RMK AO2 |
| 01:00 MST |  Overcast Fog And Mist | 1°C / 34°F | -1°C / 30°F | 87% | 1004 mb (29.65 in) | Calm | - | 1 1/4SM |
| | KGPI 220800Z 00000KT 1 1/4SM BR FEW010 BKN028 OVC090 01/M01 A2965 RMK AO2 |
| 00:55 MST |  Overcast Fog And Mist | 0°C / 32°F | -1°C / 30°F | 93% | 1004 mb (29.65 in) | Calm | - | 2SM |
| | KGPI 220755Z 00000KT 2SM BR FEW010 BKN028 OVC090 00/M01 A2965 RMK AO2 SLP059 T00001006 |