| 05:53 CST |  Partly Cloudy | 0°C / 32°F | -2°C / 28°F | 87% | 1009 mb (29.8 in) | NW 6 kph (NW 3.5 mph) | - | 7SM |
| | KGRB 291153Z 32003KT 7SM SCT021 00/M02 A2980 RMK AO2 SLP098 T00001017 10000 21011 51007 |
| 05:48 CST |  Partly Cloudy | 0°C / 32°F | -2°C / 28°F | 87% | 1009 mb (29.8 in) | NW 6 kph (NW 3.5 mph) | - | 7SM |
| | KGRB 291148Z 31003KT 7SM SCT021 00/M02 A2980 RMK AO2 |
| 05:40 CST |  Mostly Cloudy | 0°C / 32°F | -2°C / 28°F | 87% | 1009 mb (29.8 in) | NW 7 kph (NW 4.6 mph) | - | 8SM |
| | KGRB 291140Z 32004KT 8SM BKN021 00/M02 A2980 RMK AO2 |
| 05:03 CST |  Partly Cloudy | 0°C / 32°F | -2°C / 28°F | 87% | 1008 mb (29.77 in) | Calm | - | 7SM |
| | KGRB 291103Z AUTO 00000KT 7SM SCT021 00/M02 A2978 RMK AO2 TSNO |
| 04:53 CST |  Mostly Cloudy | 0°C / 32°F | -2°C / 28°F | 87% | 1008 mb (29.77 in) | Calm | - | 8SM |
| | KGRB 291053Z AUTO 00000KT 8SM BKN019 00/M02 A2978 RMK AO2 SLP091 T00001017 TSNO |
| 03:53 CST |  Mostly Cloudy | -1°C / 30°F | -2°C / 28°F | 93% | 1008 mb (29.77 in) | N 6 kph (N 3.5 mph) | - | 8SM |
| | KGRB 290953Z AUTO 36003KT 8SM BKN017 M01/M02 A2978 RMK AO2 SLP090 T10061017 TSNO |
| 03:22 CST |  Overcast | 0°C / 32°F | -2°C / 28°F | 87% | 1009 mb (29.8 in) | N 9 kph (N 5.8 mph) | - | 9SM |
| | KGRB 290922Z AUTO 36005KT 9SM OVC015 00/M02 A2979 RMK AO2 TSNO |
| 02:53 CST |  Overcast | 0°C / 32°F | -2°C / 28°F | 87% | 1009 mb (29.8 in) | N 11 kph (N 6.9 mph) | - | 10SM |
| | KGRB 290853Z AUTO 35006KT 10SM OVC011 00/M02 A2980 RMK AO2 SLP099 T00001017 55000 TSNO |
| 02:31 CST |  Mostly Cloudy | 0°C / 32°F | -2°C / 28°F | 87% | 1009 mb (29.8 in) | N 11 kph (N 6.9 mph) | - | 10SM |
| | KGRB 290831Z AUTO 35006KT 10SM BKN011 00/M02 A2981 RMK AO2 TSNO |
| 01:53 CST |  Clear | -1°C / 30°F | -2°C / 28°F | 93% | 1009 mb (29.8 in) | N 13 kph (N 8.1 mph) | - | 9SM |
| | KGRB 290753Z AUTO 36007KT 9SM CLR M01/M02 A2980 RMK AO2 SLP098 T10061022 TSNO |
| 00:53 CST |  Clear | -1°C / 30°F | -2°C / 28°F | 93% | 1009 mb (29.8 in) | N 13 kph (N 8.1 mph) | - | 8SM |
| | KGRB 290653Z AUTO 36007KT 8SM CLR M01/M02 A2979 RMK AO2 SLP096 T10111022 TSNO |