| 08:55 CST |  Overcast Light Snow | -4°C / 25°F | -5°C / 23°F | 93% | 1022 mb (30.18 in) | E 11 kph (E 6.9 mph) | - | 4SM |
| | KCMY 081455Z AUTO 08006KT 4SM -SN SCT020 BKN025 OVC037 M04/M05 A3018 RMK AO2 |
| 08:35 CST |  Overcast Light Snow | -5°C / 23°F | -5°C / 23°F | 100% | 1022 mb (30.18 in) | E 6 kph (E 3.5 mph) | - | 4SM |
| | KCMY 081435Z AUTO 08003KT 4SM -SN BKN020 OVC028 M05/M05 A3018 RMK AO2 |
| 08:15 CST |  Overcast Light Snow | -5°C / 23°F | -6°C / 21°F | 93% | 1022 mb (30.18 in) | Calm | - | 4SM |
| | KCMY 081415Z AUTO 00000KT 4SM -SN SCT024 BKN030 OVC039 M05/M06 A3018 RMK AO2 |
| 07:55 CST |  Overcast Light Snow | -5°C / 23°F | -6°C / 21°F | 93% | 1022 mb (30.18 in) | Calm | - | 2 1/2SM |
| | KCMY 081355Z AUTO 00000KT 2 1/2SM -SN BKN013 BKN018 OVC044 M05/M06 A3018 RMK AO2 |
| 07:35 CST |  Overcast Light Snow | -5°C / 23°F | -6°C / 21°F | 93% | 1022 mb (30.18 in) | Calm | - | 2SM |
| | KCMY 081335Z AUTO 00000KT 2SM -SN OVC013 M05/M06 A3019 RMK AO2 |
| 07:15 CST |  Overcast Light Snow | -5°C / 23°F | -6°C / 21°F | 93% | 1023 mb (30.21 in) | Calm | - | 2 1/2SM |
| | KCMY 081315Z AUTO 00000KT 2 1/2SM -SN OVC011 M05/M06 A3021 RMK AO2 |
| 06:55 CST |  Overcast Light Snow | -5°C / 23°F | -6°C / 21°F | 93% | 1023 mb (30.21 in) | Calm | - | 2 1/2SM |
| | KCMY 081255Z AUTO 00000KT 2 1/2SM -SN OVC011 M05/M06 A3021 RMK AO2 |
| 06:35 CST |  Overcast Light Snow | -5°C / 23°F | -6°C / 21°F | 93% | 1023 mb (30.21 in) | Calm | - | 2 1/2SM |
| | KCMY 081235Z AUTO 00000KT 2 1/2SM -SN BKN013 OVC021 M05/M06 A3022 RMK AO2 |
| 06:15 CST |  Overcast Light Snow | -5°C / 23°F | -7°C / 19°F | 86% | 1023 mb (30.21 in) | Calm | - | 4SM |
| | KCMY 081215Z AUTO 00000KT 4SM -SN OVC020 M05/M07 A3022 RMK AO2 |
| 05:55 CST |  Overcast Light Snow | -5°C / 23°F | -7°C / 19°F | 86% | 1023 mb (30.21 in) | Calm | - | 3SM |
| | KCMY 081155Z AUTO 00000KT 3SM -SN BKN020 OVC027 M05/M07 A3022 RMK AO2 |
| 05:35 CST |  Overcast | -6°C / 21°F | -7°C / 19°F | 93% | 1024 mb (30.24 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KCMY 081135Z AUTO 03003KT 10SM SCT024 BKN030 OVC038 M06/M07 A3023 RMK AO2 |
| 05:15 CST |  Overcast | -6°C / 21°F | -7°C / 19°F | 93% | 1023 mb (30.21 in) | Calm | - | 10SM |
| | KCMY 081115Z AUTO 00000KT 10SM OVC038 M06/M07 A3022 RMK AO2 |
| 04:55 CST |  Overcast | -6°C / 21°F | -7°C / 19°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 081055Z AUTO 00000KT 10SM BKN034 OVC044 M06/M07 A3023 RMK AO2 |
| 04:35 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 081035Z AUTO 00000KT 10SM BKN046 OVC060 M07/M08 A3024 RMK AO2 |
| 04:15 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 081015Z AUTO 00000KT 10SM BKN060 OVC080 M07/M08 A3024 RMK AO2 |
| 03:55 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 080955Z AUTO 00000KT 10SM BKN080 OVC110 M07/M08 A3025 RMK AO2 |
| 03:35 CST |  Mostly Cloudy | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080935Z AUTO 00000KT 10SM BKN110 M07/M08 A3026 RMK AO2 |
| 03:15 CST |  Partly Cloudy | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080915Z AUTO 00000KT 10SM SCT090 SCT120 M07/M08 A3026 RMK AO2 |
| 02:55 CST |  Mostly Cloudy | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080855Z AUTO 00000KT 10SM BKN100 M07/M08 A3026 RMK AO2 |
| 02:35 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080835Z AUTO 00000KT 10SM OVC100 M07/M08 A3027 RMK AO2 |
| 02:15 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080815Z AUTO 00000KT 10SM OVC110 M07/M08 A3027 RMK AO2 |
| 01:55 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080755Z AUTO 00000KT 10SM OVC110 M07/M08 A3027 RMK AO2 |
| 01:35 CST |  Mostly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080735Z AUTO 00000KT 10SM BKN120 M09/M10 A3027 RMK AO2 |
| 01:15 CST |  Partly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080715Z AUTO 00000KT 10SM SCT120 M09/M10 A3028 RMK AO2 |
| 00:55 CST |  Clear | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080655Z AUTO 00000KT 10SM CLR M09/M10 A3028 RMK AO2 |
| 00:35 CST |  Partly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KCMY 080635Z AUTO 00000KT 10SM SCT120 M09/M10 A3029 RMK AO2 |
| 00:15 CST |  Partly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080615Z AUTO 00000KT 10SM SCT120 M09/M10 A3028 RMK AO2 |