| 07:34 CST |  Overcast | -16°C / 3°F | -18°C / 0°F | 85% | 1024 mb (30.24 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KETH 081334Z AUTO 35004KT 10SM OVC090 M16/M18 A3023 RMK AO2 |
| 07:14 CST |  Overcast | -16°C / 3°F | -18°C / 0°F | 85% | 1024 mb (30.24 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KETH 081314Z AUTO 34003KT 10SM OVC100 M16/M18 A3024 RMK AO2 |
| 06:55 CST |  Overcast | -16°C / 3°F | -18°C / 0°F | 85% | 1024 mb (30.24 in) | NNW 9 kph (NNW 5.8 mph) | - | 10SM |
| | KETH 081255Z AUTO 34005KT 10SM OVC100 M16/M18 A3025 RMK AO2 |
| 06:35 CST |  Overcast | -16°C / 3°F | -18°C / 0°F | 85% | 1025 mb (30.27 in) | NNW 11 kph (NNW 6.9 mph) | - | 10SM |
| | KETH 081235Z AUTO 34006KT 10SM OVC100 M16/M18 A3026 RMK AO2 |
| 06:14 CST |  Overcast | -16°C / 3°F | -19°C / -2°F | 78% | 1025 mb (30.27 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KETH 081214Z AUTO 33004KT 10SM OVC100 M16/M19 A3026 RMK AO2 |
| 05:55 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1025 mb (30.27 in) | NW 7 kph (NW 4.6 mph) | - | 10SM |
| | KETH 081155Z AUTO 32004KT 10SM OVC100 M17/M19 A3026 RMK AO2 |
| 05:35 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1025 mb (30.27 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KETH 081135Z AUTO 34004KT 10SM OVC100 M17/M19 A3026 RMK AO2 |
| 05:15 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1025 mb (30.27 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KETH 081115Z AUTO 33003KT 10SM OVC100 M17/M19 A3028 RMK AO2 |
| 04:55 CST |  Mostly Cloudy | -17°C / 1°F | -19°C / -2°F | 85% | 1026 mb (30.3 in) | NW 7 kph (NW 4.6 mph) | - | 10SM |
| | KETH 081055Z AUTO 32004KT 10SM BKN100 M17/M19 A3029 RMK AO2 |
| 04:34 CST |  Mostly Cloudy | -17°C / 1°F | -20°C / -4°F | 78% | 1026 mb (30.3 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KETH 081034Z AUTO 33004KT 10SM SCT050 BKN100 M17/M20 A3030 RMK AO2 |
| 04:15 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1026 mb (30.3 in) | NNW 9 kph (NNW 5.8 mph) | - | 10SM |
| | KETH 081015Z AUTO 34005KT 10SM SCT050 OVC090 M17/M19 A3030 RMK AO2 |
| 03:55 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1026 mb (30.3 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KETH 080955Z AUTO 34004KT 10SM OVC090 M17/M19 A3030 RMK AO2 |
| 03:34 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1026 mb (30.3 in) | NNW 9 kph (NNW 5.8 mph) | - | 10SM |
| | KETH 080934Z AUTO 34005KT 10SM OVC090 M17/M19 A3031 RMK AO2 |
| 03:14 CST |  Overcast | -17°C / 1°F | -19°C / -2°F | 85% | 1027 mb (30.33 in) | NNW 11 kph (NNW 6.9 mph) | - | 10SM |
| | KETH 080914Z AUTO 33006KT 10SM OVC090 M17/M19 A3032 RMK AO2 |
| 02:54 CST |  Overcast | -17°C / 1°F | -20°C / -4°F | 78% | 1027 mb (30.33 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KETH 080854Z AUTO 33003KT 10SM OVC090 M17/M20 A3033 RMK AO2 |
| 02:34 CST |  Overcast | -17°C / 1°F | -20°C / -4°F | 78% | 1027 mb (30.33 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KETH 080834Z AUTO 33003KT 10SM OVC090 M17/M20 A3033 RMK AO2 |
| 02:14 CST |  Overcast | -17°C / 1°F | -20°C / -4°F | 78% | 1027 mb (30.33 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KETH 080814Z AUTO 35003KT 10SM OVC090 M17/M20 A3033 RMK AO2 |
| 01:54 CST |  Overcast | -18°C / 0°F | -20°C / -4°F | 84% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KETH 080754Z AUTO 00000KT 10SM OVC100 M18/M20 A3033 RMK AO2 |
| 01:34 CST |  Overcast | -18°C / 0°F | -20°C / -4°F | 84% | 1027 mb (30.33 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KETH 080734Z AUTO 34004KT 10SM OVC100 M18/M20 A3033 RMK AO2 |
| 01:14 CST |  Partly Cloudy | -18°C / 0°F | -21°C / -6°F | 78% | 1027 mb (30.33 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KETH 080714Z AUTO 33004KT 10SM SCT100 M18/M21 A3034 RMK AO2 |
| 00:54 CST |  Partly Cloudy | -18°C / 0°F | -21°C / -6°F | 78% | 1027 mb (30.33 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KETH 080654Z AUTO 33003KT 10SM SCT100 M18/M21 A3033 RMK AO2 |
| 00:35 CST |  Clear | -18°C / 0°F | -21°C / -6°F | 78% | 1027 mb (30.33 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KETH 080635Z AUTO 34003KT 10SM CLR M18/M21 A3033 RMK AO2 |
| 00:14 CST |  Clear | -18°C / 0°F | -21°C / -6°F | 78% | 1027 mb (30.33 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KETH 080614Z AUTO 35003KT 10SM CLR M18/M21 A3033 RMK AO2 |