| 20:51 CST |  Overcast Hazy | -2°C / 28°F | -4°C / 25°F | 86% | 1022 mb (30.18 in) | Calm | - | 4SM |
| | KMDW 220251Z 00000KT 4SM HZ OVC014 M02/M04 A3018 RMK AO2 SLP232 T10171044 53005 |
| 19:51 CST |  Overcast Hazy | -2°C / 28°F | -4°C / 25°F | 86% | 1022 mb (30.18 in) | WNW 6 kph (WNW 3.5 mph) | - | 5SM |
| | KMDW 220151Z 29003KT 5SM HZ OVC014 M02/M04 A3017 RMK AO2 SLP231 T10171044 |
| 18:51 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1021 mb (30.15 in) | WNW 9 kph (WNW 5.8 mph) | - | 6SM |
| | KMDW 220051Z 29005KT 6SM HZ OVC014 M02/M05 A3016 RMK AO2 SLP226 T10171050 |
| 18:41 CST |  Overcast Hazy | -2°C / 28°F | -4°C / 25°F | 86% | 1021 mb (30.15 in) | W 6 kph (W 3.5 mph) | - | 6SM |
| | KMDW 220041Z 27003KT 6SM HZ OVC014 M02/M04 A3016 RMK AO2 |
| 17:51 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1021 mb (30.15 in) | SSW 9 kph (SSW 5.8 mph) | - | 6SM |
| | KMDW 212351Z 26005KT 6SM HZ OVC016 M02/M05 A3016 RMK AO2 SLP227 T10171050 11017 21028 53010 |
| 16:51 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1021 mb (30.15 in) | W 13 kph (W 8.1 mph) | - | 6SM |
| | KMDW 212251Z 27007KT 6SM HZ BKN016 OVC060 M02/M05 A3015 RMK AO2 SLP223 T10171050 |
| 16:43 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1021 mb (30.15 in) | SSW 11 kph (SSW 6.9 mph) | - | 6SM |
| | KMDW 212243Z 26006KT 6SM HZ BKN016 OVC060 M02/M05 A3014 RMK AO2 |
| 15:51 CST |  Overcast Hazy | -2°C / 28°F | -6°C / 21°F | 74% | 1021 mb (30.15 in) | SSW 13 kph (SSW 8.1 mph) | - | 6SM |
| | KMDW 212151Z 25007KT 6SM HZ OVC014 M02/M06 A3014 RMK AO2 SLP219 T10221056 |
| 14:51 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1020 mb (30.12 in) | SSW 19 kph (SSW 11.5 mph) | - | 6SM |
| | KMDW 212051Z 25010KT 6SM HZ OVC012 M02/M05 A3013 RMK AO2 SLP217 T10221050 51001 |
| 13:51 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1020 mb (30.12 in) | SSW 17 kph (SSW 10.4 mph) | - | 6SM |
| | KMDW 211951Z 25009KT 6SM HZ OVC014 M02/M05 A3013 RMK AO2 SLP217 T10221050 |
| 13:46 CST |  Overcast Hazy | -2°C / 28°F | -5°C / 23°F | 80% | 1020 mb (30.12 in) | SSW 19 kph (SSW 11.5 mph) | - | 6SM |
| | KMDW 211946Z 24010KT 6SM HZ OVC014 M02/M05 A3013 RMK AO2 |
| 13:06 CST |  Overcast | -2°C / 28°F | -6°C / 21°F | 74% | 1020 mb (30.12 in) | WNW 11 kph (WNW 6.9 mph) | - | 8SM |
| | KMDW 211906Z 29006KT 8SM OVC016 M02/M06 A3012 RMK AO2 |
| 12:51 CST |  Overcast Hazy | -2°C / 28°F | -6°C / 21°F | 74% | 1020 mb (30.12 in) | SSW 11 kph (SSW 6.9 mph) | - | 6SM |
| | KMDW 211851Z 25006KT 6SM HZ BKN014 OVC018 M02/M06 A3013 RMK AO2 SLP216 T10221061 |
| 11:51 CST |  Overcast | -2°C / 28°F | -6°C / 21°F | 74% | 1021 mb (30.15 in) | SSW 15 kph (SSW 9.2 mph) | - | 7SM |
| | KMDW 211751Z 26008KT 7SM OVC014 M02/M06 A3014 RMK AO2 SLP218 4/001 T10221056 11022 21033 58002 |
| 10:51 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1021 mb (30.15 in) | SSW 9 kph (SSW 5.8 mph) | - | 8SM |
| | KMDW 211651Z 26005KT 8SM OVC014 M03/M06 A3015 RMK AO2 SLP224 T10281056 |
| 09:51 CST |  Overcast | -2°C / 28°F | -6°C / 21°F | 74% | 1021 mb (30.15 in) | SSW 7 kph (SSW 4.6 mph) | - | 7SM |
| | KMDW 211551Z 25004KT 7SM OVC013 M02/M06 A3014 RMK AO2 SLP220 T10221056 |
| 08:51 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1021 mb (30.15 in) | SSW 9 kph (SSW 5.8 mph) | - | 7SM |
| | KMDW 211451Z 26005KT 7SM OVC013 M03/M06 A3014 RMK AO2 SLP221 T10281056 53016 |
| 07:51 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1020 mb (30.12 in) | NW 11 kph (NW 6.9 mph) | - | 8SM |
| | KMDW 211351Z 30006KT 8SM OVC013 M03/M06 A3012 RMK AO2 SLP213 T10281056 $ |
| 06:51 CST |  Overcast Hazy | -3°C / 27°F | -6°C / 21°F | 80% | 1020 mb (30.12 in) | W 11 kph (W 6.9 mph) | - | 6SM |
| | KMDW 211251Z 27006KT 6SM HZ OVC013 M03/M06 A3012 RMK AO2 SLP212 T10281056 $ |
| 06:27 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1020 mb (30.12 in) | WNW 15 kph (WNW 9.2 mph) | - | 7SM |
| | KMDW 211227Z 29008KT 7SM BKN013 BKN024 OVC060 M03/M06 A3011 RMK AO2 $ |
| 05:57 CST |  Mostly Cloudy | -3°C / 27°F | -6°C / 21°F | 80% | 1019 mb (30.09 in) | W 7 kph (W 4.6 mph) | - | 7SM |
| | KMDW 211157Z 27004KT 7SM FEW020 BKN025 BKN060 M03/M06 A3010 RMK AO2 $ |
| 05:51 CST |  Mostly Cloudy | -3°C / 27°F | -6°C / 21°F | 80% | 1019 mb (30.09 in) | W 7 kph (W 4.6 mph) | - | 7SM |
| | KMDW 211151Z 27004KT 7SM FEW025 BKN060 M03/M06 A3010 RMK AO2 SLP204 4/001 60000 T10281056 11022 21028 53003 $ |
| 04:51 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1019 mb (30.09 in) | SSW 9 kph (SSW 5.8 mph) | - | 7SM |
| | KMDW 211051Z 26005KT 7SM FEW013 BKN035 OVC055 M03/M06 A3009 RMK AO2 SLP202 T10281056 $ |
| 03:51 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1019 mb (30.09 in) | W 9 kph (W 5.8 mph) | 0.00 mm (0.00 in) | 7SM |
| | KMDW 210951Z 28005KT 7SM FEW019 BKN033 OVC040 M03/M06 A3008 RMK AO2 SNE23 SLP199 P0000 T10281056 $ |
| 03:29 CST |  Overcast | -3°C / 27°F | -6°C / 21°F | 80% | 1019 mb (30.09 in) | WNW 7 kph (WNW 4.6 mph) | 0.00 mm (0.00 in) | 7SM |
| | KMDW 210929Z 29004KT 7SM FEW019 OVC035 M03/M06 A3008 RMK AO2 SNE23 P0000 $ |
| 02:51 CST |  Overcast Light Snow | -3°C / 27°F | -5°C / 23°F | 86% | 1019 mb (30.09 in) | W 6 kph (W 3.5 mph) | 0.00 mm (0.00 in) | 6SM |
| | KMDW 210851Z 28003KT 6SM -SN BR OVC011 M03/M05 A3009 RMK AO2 SLP201 P0000 60000 T10281050 50002 $ |
| 02:25 CST |  Overcast Light Snow | -3°C / 27°F | -5°C / 23°F | 86% | 1019 mb (30.09 in) | W 9 kph (W 5.8 mph) | 0.00 mm (0.00 in) | 6SM |
| | KMDW 210825Z 27005KT 6SM -SN BR BKN009 OVC037 M03/M05 A3009 RMK AO2 P0000 $ |
| 01:51 CST |  Overcast Light Snow | -3°C / 27°F | -5°C / 23°F | 86% | 1019 mb (30.09 in) | SSW 9 kph (SSW 5.8 mph) | 0.00 mm (0.00 in) | 6SM |
| | KMDW 210751Z 25005KT 6SM -SN BR FEW011 BKN026 OVC039 M03/M05 A3009 RMK AO2 SLP203 P0000 T10281050 $ |
| 00:51 CST |  Overcast Light Snow | -3°C / 27°F | -5°C / 23°F | 86% | 1019 mb (30.09 in) | SSW 11 kph (SSW 6.9 mph) | 0.00 mm (0.00 in) | 6SM |
| | KMDW 210651Z 25006KT 6SM -SN BR SCT011 OVC020 M03/M05 A3009 RMK AO2 SLP202 P0000 T10281050 $ |
| 00:10 CST |  Overcast Light Snow | -3°C / 27°F | -5°C / 23°F | 86% | 1019 mb (30.09 in) | SSW 11 kph (SSW 6.9 mph) | 0.00 mm (0.00 in) | 5SM |
| | KMDW 210610Z 24006KT 5SM -SN BR FEW011 BKN017 OVC022 M03/M05 A3008 RMK AO2 P0000 $ |