| 06:35 MST |  Overcast Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1005 mb (29.68 in) | SW 15 kph (SW 9.2 mph) | - | 1/2SM |
| | KBIL 221335Z 23008KT 1/2SM R10L/1400V1800FT FZFG BKN002 OVC009 M04/M05 A2969 RMK AO2 |
| 06:16 MST |  Obscured Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | SW 13 kph (SW 8.1 mph) | - | 1/4SM |
| | KBIL 221316Z 21007KT 1/4SM R10L/1400V1800FT FZFG VV001 M04/M06 A2969 RMK AO2 |
| 06:02 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | S 9 kph (S 5.8 mph) | - | 1/8SM |
| | KBIL 221302Z 19005KT 1/8SM R10L/1200V2000FT FZFG BKN001 OVC008 M04/M06 A2969 RMK AO2 TWR VIS 1/4 |
| 05:53 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | SSE 11 kph (SSE 6.9 mph) | - | 1/8SM |
| | KBIL 221253Z 20006KT 1/8SM R10L/2000V6000FT FZFG BKN001 OVC008 M04/M06 A2969 RMK AO2 SLP083 T10441056 |
| 05:14 MST |  Overcast Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1005 mb (29.68 in) | SW 11 kph (SW 6.9 mph) | - | 1/4SM |
| | KBIL 221214Z 21006KT 1/4SM R10L/P6000FT FZFG BKN001 OVC007 M04/M05 A2968 RMK AO2 VIS 1/8V1/2 |
| 05:01 MST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -5°C / 23°F | 86% | 1005 mb (29.68 in) | Calm | - | 1SM |
| | KBIL 221201Z 00000KT 1SM R10L/P6000FT BR SCT001 BKN007 M03/M05 A2968 RMK AO2 VIS 1/4V1 1/2 |
| 04:53 MST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -5°C / 23°F | 86% | 1005 mb (29.68 in) | Calm | - | 3/4SM |
| | KBIL 221153Z 00000KT 3/4SM R10L/1800VP6000FT BR FEW001 BKN007 M03/M05 A2968 RMK AO2 SLP079 VIS 1/4V1 1/2 T10331050 11017 21050 58004 |
| 04:45 MST |  Mostly Cloudy Fog And Mist | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | Calm | - | 3/4SM |
| | KBIL 221145Z 00000KT 3/4SM R10L/6000VP6000FT BR SCT001 BKN007 M04/M06 A2968 RMK AO2 VIS 1/4V1 |
| 04:39 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | Calm | - | 1/2SM |
| | KBIL 221139Z 00000KT 1/2SM R10L/3000VP6000FT FZFG BKN001 OVC007 M04/M06 A2968 RMK AO2 |
| 04:30 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | Calm | - | 1/4SM |
| | KBIL 221130Z 00000KT 1/4SM R10L/1400V3000FT FZFG BKN001 OVC009 M04/M06 A2969 RMK AO2 |
| 04:19 MST |  Obscured Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1005 mb (29.68 in) | Calm | - | 1/8SM |
| | KBIL 221119Z 00000KT 1/8SM R10L/1200V1400FT FZFG VV001 M04/M06 A2969 RMK AO2 |
| 04:02 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 221102Z 00000KT 1/4SM R10L/1400VP6000FT FZFG BKN001 OVC008 M04/M06 A2970 RMK AO2 |
| 03:53 MST |  Mostly Cloudy Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | Calm | - | 3/4SM |
| | KBIL 221053Z 00000KT 3/4SM R10L/P6000FT BR SCT001 BKN008 M04/M05 A2970 RMK AO2 SLP081 VIS 1/2V1 1/2 T10391050 |
| 03:35 MST |  Partly Cloudy Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | Calm | - | 3/4SM |
| | KBIL 221035Z 00000KT 3/4SM R10L/2000VP6000FT BR SCT001 SCT008 M04/M05 A2970 RMK AO2 VIS 1/2V1 |
| 03:24 MST |  Mostly Cloudy Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 221024Z 00000KT 1/4SM R10L/1600V6000FT FZFG SCT001 BKN006 M04/M05 A2971 RMK AO2 VIS 1/8V1 |
| 03:20 MST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | NNW 6 kph (NNW 3.5 mph) | - | 2SM |
| | KBIL 221020Z 33003KT 2SM R10L/1600VP6000FT BR SCT001 BKN006 M03/M04 A2971 RMK AO2 VIS 1/4V1 |
| 03:16 MST |  Mostly Cloudy Fog | -4°C / 25°F | -4°C / 25°F | 100% | 1006 mb (29.71 in) | N 6 kph (N 3.5 mph) | - | 1/2SM |
| | KBIL 221016Z 35003KT 1/2SM R10L/1800VP6000FT FZFG SCT001 BKN006 M04/M04 A2971 RMK AO2 VIS 1/4V1 |
| 03:09 MST |  Overcast Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | NW 7 kph (NW 4.6 mph) | - | 1/4SM |
| | KBIL 221009Z 31004KT 1/4SM R10L/1200V3500FT FZFG BKN001 OVC006 M04/M05 A2971 RMK AO2 |
| 02:57 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 220957Z 00000KT 1/4SM R10L/1000V2000FT FZFG BKN001 OVC008 M04/M06 A2971 RMK AO2 |
| 02:53 MST |  Overcast Fog | -4°C / 25°F | -6°C / 21°F | 86% | 1006 mb (29.71 in) | Calm | - | 1/8SM |
| | KBIL 220953Z 00000KT 1/8SM R10L/1000V2000FT FZFG BKN001 OVC008 M04/M06 A2971 RMK AO2 SLP083 T10441056 |
| 02:51 MST |  Overcast Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | Calm | - | 1/8SM |
| | KBIL 220951Z 00000KT 1/8SM R10L/1000V2200FT FZFG BKN001 OVC008 M04/M05 A2971 RMK AO2 |
| 02:38 MST |  Mostly Cloudy Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 220938Z 00000KT 1/4SM R10L/1400V2200FT FZFG SCT001 BKN008 M03/M04 A2971 RMK AO2 |
| 02:18 MST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1006 mb (29.71 in) | Calm | - | 3/4SM |
| | KBIL 220918Z 00000KT 3/4SM R10L/P6000FT BR SCT001 BKN008 M03/M03 A2970 RMK AO2 VIS 1/4V1 |
| 01:59 MST |  Partly Cloudy Fog And Mist | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | Calm | - | 4SM |
| | KBIL 220859Z 00000KT 4SM R10L/3000VP6000FT BR FEW001 SCT006 M03/M04 A2970 RMK AO2 VIS NW-E 1 1/2 |
| 01:53 MST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | Calm | - | 1 1/2SM |
| | KBIL 220853Z 00000KT 1 1/2SM R10L/2800VP6000FT BR SCT001 BKN006 M03/M04 A2970 RMK AO2 SLP075 VIS 1/4V4 T10331039 56007 |
| 01:45 MST |  Mostly Cloudy Fog | -4°C / 25°F | -4°C / 25°F | 100% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 220845Z 00000KT 1/4SM R10L/1000V4000FT FZFG SCT001 BKN006 M04/M04 A2970 RMK AO2 VIS 1/8V1/2 |
| 01:34 MST |  Mostly Cloudy Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1005 mb (29.68 in) | NW 6 kph (NW 3.5 mph) | - | 1/4SM |
| | KBIL 220834Z 32003KT 1/4SM R10L/1200V1600FT FZFG SCT001 BKN006 M04/M05 A2969 RMK AO2 |
| 01:28 MST |  Mostly Cloudy Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1005 mb (29.68 in) | NW 7 kph (NW 4.6 mph) | - | 1/4SM |
| | KBIL 220828Z 32004KT 1/4SM R10L/1200VP6000FT FZFG SCT001 BKN006 M04/M05 A2969 RMK AO2 |
| 01:05 MST |  Mostly Cloudy Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1005 mb (29.68 in) | Calm | - | 1/2SM |
| | KBIL 220805Z 00000KT 1/2SM R10L/1800V3500FT BCFG SCT001 BKN008 M04/M05 A2969 RMK AO2 VIS 1/4V3/4 |
| 00:53 MST |  Partly Cloudy Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1006 mb (29.71 in) | Calm | - | 4SM |
| | KBIL 220753Z 00000KT 4SM BCFG FEW001 SCT008 M02/M03 A2970 RMK AO2 SLP075 VIS NW-E 1 BCFG ALQDS T10221028 |
| 00:43 MST |  Partly Cloudy Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | Calm | - | 4SM |
| | KBIL 220743Z 00000KT 4SM BCFG FEW001 SCT008 M03/M04 A2970 RMK AO2 VIS NW-E 1 1/2 BCFG ALQDS |
| 00:36 MST |  Partly Cloudy Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | Calm | - | 2SM |
| | KBIL 220736Z 00000KT 2SM R10L/2000VP6000FT BCFG FEW001 SCT008 M04/M05 A2970 RMK AO2 VIS 1/2V4 BCFG ALQDS |
| 00:27 MST |  Mostly Cloudy Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 220727Z 00000KT 1/4SM R10L/1200V4000FT FZFG BKN001 BKN008 M04/M05 A2970 RMK AO2 |
| 00:11 MST |  Overcast Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | Calm | - | 1/4SM |
| | KBIL 220711Z 00000KT 1/4SM R10L/1000V2000FT FZFG BKN001 OVC008 M03/M04 A2970 RMK AO2 |
| 00:06 MST |  Mostly Cloudy Fog And Mist | -3°C / 27°F | -4°C / 25°F | 93% | 1006 mb (29.71 in) | N 6 kph (N 3.5 mph) | - | 1SM |
| | KBIL 220706Z 36003KT 1SM R10L/1000VP6000FT BR SCT001 BKN009 M03/M04 A2970 RMK AO2 VIS 1/2V1 1/2 |