| 08:53 CST |  Overcast | -1°C / 30°F | -7°C / 19°F | 64% | 1011 mb (29.85 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KGRB 031453Z 33004KT 10SM OVC036 M01/M07 A2986 RMK AO2 SLP119 T10111072 53025 |
| 07:53 CST |  Overcast | -1°C / 30°F | -7°C / 19°F | 64% | 1010 mb (29.83 in) | N 13 kph (N 8.1 mph) | - | 10SM |
| | KGRB 031353Z 36007KT 10SM OVC032 M01/M07 A2983 RMK AO2 SLP109 T10111067 |
| 07:38 CST |  Overcast | -1°C / 30°F | -7°C / 19°F | 64% | 1010 mb (29.83 in) | N 19 kph (N 11.5 mph) | - | 10SM |
| | KGRB 031338Z 36010KT 10SM OVC030 M01/M07 A2982 RMK AO2 |
| 06:53 CST |  Overcast | -1°C / 30°F | -7°C / 19°F | 64% | 1009 mb (29.8 in) | N 15 kph (N 9.2 mph) | - | 10SM |
| | KGRB 031253Z 35008KT 10SM OVC028 M01/M07 A2980 RMK AO2 SLP098 T10111067 |
| 06:44 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1009 mb (29.8 in) | N 17 kph (N 10.4 mph) | - | 10SM |
| | KGRB 031244Z 35009KT 10SM OVC028 M01/M06 A2980 RMK AO2 |
| 06:16 CST |  Overcast | -1°C / 30°F | -7°C / 19°F | 64% | 1009 mb (29.8 in) | N 15 kph (N 9.2 mph) | - | 10SM |
| | KGRB 031216Z 36008KT 10SM OVC032 M01/M07 A2979 RMK AO2 |
| 05:53 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1008 mb (29.77 in) | N 19 kph (N 11.5 mph) | - | 10SM |
| | KGRB 031153Z 36010KT 10SM OVC027 M01/M06 A2978 RMK AO2 SLP092 T10111061 10006 21011 53016 |
| 05:26 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1008 mb (29.77 in) | N 17 kph (N 10.4 mph) | - | 10SM |
| | KGRB 031126Z 35009KT 10SM BKN029 OVC033 M01/M06 A2977 RMK AO2 |
| 05:11 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1008 mb (29.77 in) | N 22 kph (N 13.8 mph) | - | 10SM |
| | KGRB 031111Z AUTO 35012KT 10SM OVC031 M01/M06 A2977 RMK AO2 |
| 04:53 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1008 mb (29.77 in) | N 20 kph (N 12.7 mph) | - | 10SM |
| | KGRB 031053Z AUTO 35011KT 10SM OVC027 M01/M06 A2976 RMK AO2 SLP085 T10061061 |
| 03:53 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1007 mb (29.74 in) | N 20 kph (N 12.7 mph) | - | 10SM |
| | KGRB 030953Z AUTO 35011KT 10SM OVC027 M01/M06 A2975 RMK AO2 SLP083 T10061056 |
| 02:53 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1007 mb (29.74 in) | N 19 kph (N 11.5 mph) | - | 10SM |
| | KGRB 030853Z AUTO 35010G16KT 10SM OVC029 M01/M06 A2973 RMK AO2 SLP076 T10061056 53005 |
| 01:53 CST |  Overcast | 0°C / 32°F | -5°C / 23°F | 69% | 1007 mb (29.74 in) | N 20 kph (N 12.7 mph) | - | 10SM |
| | KGRB 030753Z AUTO 35011KT 10SM OVC029 00/M05 A2973 RMK AO2 SLP074 T00001050 |
| 00:53 CST |  Overcast | 0°C / 32°F | -4°C / 25°F | 75% | 1006 mb (29.71 in) | N 30 kph (N 18.4 mph) | - | 10SM |
| | KGRB 030653Z AUTO 35016KT 10SM BKN029 OVC035 00/M04 A2971 RMK AO2 SLP069 T00001044 |