| 11:56 CST |  Overcast | -2°C / 28°F | -6°C / 21°F | 74% | 1021 mb (30.15 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 231756Z AUTO 09014KT 10SM OVC025 M02/M06 A3015 RMK AO2 T10161060 11013 21017 |
| 11:36 CST |  Overcast | -2°C / 28°F | -6°C / 21°F | 74% | 1021 mb (30.15 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 231736Z AUTO 08013KT 10SM OVC025 M02/M06 A3016 RMK AO2 T10161061 |
| 11:15 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 20 kph (E 12.7 mph) | - | 10SM |
| | KSYN 231715Z AUTO 08011G19KT 10SM OVC025 M01/M06 A3017 RMK AO2 T10151063 |
| 10:56 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 231656Z AUTO 08013KT 10SM OVC025 M01/M06 A3018 RMK AO2 T10151062 |
| 10:35 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 231635Z AUTO 09013KT 10SM OVC025 M01/M06 A3019 RMK AO2 T10141063 |
| 10:16 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 20 kph (E 12.7 mph) | - | 10SM |
| | KSYN 231616Z AUTO 08011G18KT 10SM OVC025 M01/M06 A3019 RMK AO2 T10141061 |
| 09:56 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 231556Z AUTO 09012KT 10SM OVC025 M01/M06 A3019 RMK AO2 T10131061 |
| 09:36 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 19 kph (E 11.5 mph) | - | 10SM |
| | KSYN 231536Z AUTO 08010KT 10SM OVC025 M01/M06 A3019 RMK AO2 T10131059 |
| 09:16 CST |  Overcast | -1°C / 30°F | -6°C / 21°F | 69% | 1022 mb (30.18 in) | E 20 kph (E 12.7 mph) | - | 10SM |
| | KSYN 231516Z AUTO 08011G15KT 10SM OVC025 M01/M06 A3019 RMK AO2 T10141056 |
| 08:56 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | E 20 kph (E 12.7 mph) | - | 10SM |
| | KSYN 231456Z AUTO 08011KT 10SM BKN025 OVC039 M01/M05 A3019 RMK AO2 T10151055 |
| 08:35 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 231435Z AUTO 08013G17KT 10SM BKN025 OVC039 M01/M05 A3018 RMK AO2 LTG DSNT S T10151053 |
| 08:15 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 231415Z AUTO 08014G17KT 10SM BKN025 OVC033 M01/M05 A3019 RMK AO2 T10151055 |
| 07:55 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 231355Z AUTO 08012KT 10SM OVC023 M01/M05 A3018 RMK AO2 T10151051 |
| 07:35 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 231335Z AUTO 08012KT 10SM OVC023 M01/M05 A3018 RMK AO2 T10151051 |
| 07:15 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | ENE 19 kph (ENE 11.5 mph) | - | 10SM |
| | KSYN 231315Z AUTO 07010G15KT 10SM SCT023 OVC034 M01/M05 A3018 RMK AO2 T10151051 |
| 06:56 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 231256Z AUTO 08013KT 10SM SCT024 OVC034 M01/M05 A3018 RMK AO2 T10151051 |
| 06:36 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1022 mb (30.18 in) | ENE 24 kph (ENE 15 mph) | - | 10SM |
| | KSYN 231236Z AUTO 07013KT 10SM OVC034 M01/M05 A3018 RMK AO2 T10151051 |
| 06:16 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 231216Z AUTO 08014KT 10SM OVC034 M02/M05 A3018 RMK AO2 T10161050 |
| 05:56 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | E 19 kph (E 11.5 mph) | - | 10SM |
| | KSYN 231156Z AUTO 08010KT 10SM OVC032 M02/M05 A3018 RMK AO2 T10161051 11015 21016 |
| 05:36 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 231136Z AUTO 08012G18KT 10SM OVC034 M02/M05 A3018 RMK AO2 T10161051 |
| 05:16 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | ENE 24 kph (ENE 15 mph) | - | 10SM |
| | KSYN 231116Z AUTO 07013KT 10SM OVC034 M02/M05 A3018 RMK AO2 T10161052 |
| 04:56 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | ENE 22 kph (ENE 13.8 mph) | - | 10SM |
| | KSYN 231056Z AUTO 07012KT 10SM OVC032 M02/M05 A3018 RMK AO2 T10161052 |
| 04:35 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | ENE 24 kph (ENE 15 mph) | - | 10SM |
| | KSYN 231035Z AUTO 07013G16KT 10SM OVC032 M02/M05 A3018 RMK AO2 T10161052 |
| 04:16 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | E 20 kph (E 12.7 mph) | - | 10SM |
| | KSYN 231016Z AUTO 08011KT 10SM OVC032 M02/M05 A3018 RMK AO2 T10161051 |
| 03:55 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1022 mb (30.18 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 230955Z AUTO 08012KT 10SM SCT022 OVC032 M02/M05 A3019 RMK AO2 T10161052 |
| 03:36 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 230936Z AUTO 08013KT 10SM SCT022 OVC035 M02/M05 A3020 RMK AO2 T10161051 |
| 03:15 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 230915Z AUTO 08012KT 10SM OVC036 M02/M05 A3020 RMK AO2 T10161051 |
| 02:55 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 230855Z AUTO 08013G19KT 10SM OVC036 M02/M05 A3020 RMK AO2 T10161050 |
| 02:35 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 230835Z AUTO 09012KT 10SM OVC038 M02/M05 A3020 RMK AO2 T10161050 |
| 02:16 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 230816Z AUTO 09014KT 10SM OVC042 M02/M05 A3020 RMK AO2 T10161051 |
| 01:55 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1023 mb (30.21 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 230755Z AUTO 09014KT 10SM OVC044 M01/M05 A3020 RMK AO2 T10151050 |
| 01:36 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 230736Z AUTO 09014KT 10SM OVC042 M02/M05 A3020 RMK AO2 T10161050 |
| 01:15 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 26 kph (E 16.1 mph) | - | 10SM |
| | KSYN 230715Z AUTO 08014KT 10SM OVC042 M02/M05 A3021 RMK AO2 T10161050 |
| 00:56 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 19 kph (E 11.5 mph) | - | 10SM |
| | KSYN 230656Z AUTO 09010KT 10SM OVC044 M02/M05 A3021 RMK AO2 T10161049 |
| 00:36 CST |  Overcast | -2°C / 28°F | -5°C / 23°F | 80% | 1023 mb (30.21 in) | E 24 kph (E 15 mph) | - | 10SM |
| | KSYN 230636Z AUTO 08013KT 10SM SCT046 OVC060 M02/M05 A3020 RMK AO2 T10161048 |
| 00:16 CST |  Overcast | -1°C / 30°F | -5°C / 23°F | 75% | 1023 mb (30.21 in) | E 22 kph (E 13.8 mph) | - | 10SM |
| | KSYN 230616Z AUTO 08012KT 10SM SCT015 OVC060 M01/M05 A3020 RMK AO2 T10151047 |