| 21:47 CST |  Clear | 8°C / 46°F | 6°C / 43°F | 87% | 1006 mb (29.71 in) | Calm | - | 3SM |
| | KSEP 090347Z AUTO 00000KT 3SM CLR 08/06 A2971 RMK AO1 |
| 21:28 CST |  Clear | 8°C / 46°F | 7°C / 45°F | 93% | 1006 mb (29.71 in) | S 6 kph (S 3.5 mph) | - | 4SM |
| | KSEP 090328Z AUTO 19003KT 4SM CLR 08/07 A2970 RMK AO1 |
| 20:47 CST |  Clear | 9°C / 48°F | 7°C / 45°F | 87% | 1005 mb (29.68 in) | Calm | - | 4SM |
| | KSEP 090247Z AUTO 00000KT 4SM CLR 09/07 A2969 RMK AO1 |
| 20:25 CST |  Clear | 9°C / 48°F | 7°C / 45°F | 87% | 1005 mb (29.68 in) | SSE 6 kph (SSE 3.5 mph) | - | 4SM |
| | KSEP 090225Z AUTO 20003KT 4SM CLR 09/07 A2968 RMK AO1 |
| 20:05 CST |  Clear | 10°C / 50°F | 7°C / 45°F | 82% | 1005 mb (29.68 in) | Calm | - | 4SM |
| | KSEP 090205Z AUTO 00000KT 4SM CLR 10/07 A2968 RMK AO1 |
| 19:48 CST |  Partly Cloudy | 10°C / 50°F | 7°C / 45°F | 82% | 1005 mb (29.68 in) | Calm | - | 4SM |
| | KSEP 090148Z AUTO 00000KT 4SM SCT060 SCT080 SCT110 10/07 A2968 RMK AO1 |
| 19:27 CST |  Partly Cloudy | 11°C / 52°F | 7°C / 45°F | 77% | 1005 mb (29.68 in) | Calm | - | 5SM |
| | KSEP 090127Z AUTO 00000KT 5SM SCT050 SCT060 SCT075 11/07 A2967 RMK AO1 |
| 19:07 CST |  Partly Cloudy | 11°C / 52°F | 7°C / 45°F | 77% | 1005 mb (29.68 in) | Calm | - | 7SM |
| | KSEP 090107Z AUTO 00000KT 7SM SCT050 SCT070 SCT085 11/07 A2967 RMK AO1 |
| 18:45 CST |  Partly Cloudy | 12°C / 54°F | 8°C / 46°F | 77% | 1005 mb (29.68 in) | NNW 17 kph (NNW 10.4 mph) | - | 7SM |
| | KSEP 090045Z AUTO 34009G20KT 7SM SCT070 SCT085 12/08 A2967 RMK AO1 |
| 18:25 CST |  Clear | 14°C / 57°F | 9°C / 48°F | 72% | 1004 mb (29.65 in) | NW 20 kph (NW 12.7 mph) | - | 5SM |
| | KSEP 090025Z AUTO 31011G18KT 5SM CLR 14/09 A2966 RMK AO1 |
| 18:07 CST |  Partly Cloudy | 14°C / 57°F | 9°C / 48°F | 72% | 1003 mb (29.62 in) | NW 17 kph (NW 10.4 mph) | - | 7SM |
| | KSEP 090007Z AUTO 30009G16KT 7SM SCT022 SCT080 14/09 A2963 RMK AO1 |
| 17:49 CST |  Clear | 13°C / 55°F | 9°C / 48°F | 77% | 1001 mb (29.56 in) | SSE 6 kph (SSE 3.5 mph) | - | 7SM |
| | KSEP 082349Z AUTO 20003KT 7SM CLR 13/09 A2957 RMK AO1 |
| 17:27 CST |  Clear | 13°C / 55°F | 9°C / 48°F | 77% | 1001 mb (29.56 in) | S 6 kph (S 3.5 mph) | - | 5SM |
| | KSEP 082327Z AUTO 19003KT 5SM CLR 13/09 A2956 RMK AO1 |
| 17:05 CST |  Clear | 14°C / 57°F | 9°C / 48°F | 72% | 1001 mb (29.56 in) | SSE 6 kph (SSE 3.5 mph) | - | 10SM |
| | KSEP 082305Z AUTO 20003KT 10SM CLR 14/09 A2956 RMK AO1 |
| 16:47 CST |  Clear | 14°C / 57°F | 9°C / 48°F | 72% | 1000 mb (29.53 in) | SW 7 kph (SW 4.6 mph) | - | 10SM |
| | KSEP 082247Z AUTO 22004KT 10SM CLR 14/09 A2954 RMK AO1 |
| 16:25 CST |  Clear | 15°C / 59°F | 8°C / 46°F | 63% | 1000 mb (29.53 in) | SW 17 kph (SW 10.4 mph) | - | 10SM |
| | KSEP 082225Z AUTO 22009KT 10SM CLR 15/08 A2953 RMK AO1 |
| 16:05 CST |  Clear | 15°C / 59°F | 8°C / 46°F | 63% | 1000 mb (29.53 in) | SW 13 kph (SW 8.1 mph) | - | 7SM |
| | KSEP 082205Z AUTO 22007KT 7SM CLR 15/08 A2952 RMK AO1 |
| 15:45 CST |  Clear | 15°C / 59°F | 8°C / 46°F | 63% | 1000 mb (29.53 in) | SSW 20 kph (SSW 12.7 mph) | - | 10SM |
| | KSEP 082145Z AUTO 24011KT 10SM CLR 15/08 A2953 RMK AO1 |
| 15:25 CST |  Clear | 15°C / 59°F | 8°C / 46°F | 63% | 1000 mb (29.53 in) | SW 24 kph (SW 15 mph) | - | 10SM |
| | KSEP 082125Z AUTO 23013G19KT 10SM CLR 15/08 A2952 RMK AO1 |
| 15:07 CST |  Clear | 14°C / 57°F | 8°C / 46°F | 67% | 999 mb (29.5 in) | SW 24 kph (SW 15 mph) | - | 10SM |
| | KSEP 082107Z AUTO 22013G18KT 10SM CLR 14/08 A2951 RMK AO1 |
| 14:45 CST |  Clear | 14°C / 57°F | 9°C / 48°F | 72% | 999 mb (29.5 in) | SW 19 kph (SW 11.5 mph) | - | 7SM |
| | KSEP 082045Z AUTO 22010G16KT 7SM CLR 14/09 A2951 RMK AO1 |
| 14:25 CST |  Clear | 13°C / 55°F | 8°C / 46°F | 72% | 1000 mb (29.53 in) | SW 20 kph (SW 12.7 mph) | - | 7SM |
| | KSEP 082025Z AUTO 22011KT 7SM CLR 13/08 A2953 RMK AO1 |
| 14:05 CST |  Partly Cloudy | 12°C / 54°F | 8°C / 46°F | 77% | 1000 mb (29.53 in) | SW 20 kph (SW 12.7 mph) | - | 7SM |
| | KSEP 082005Z AUTO 21011G17KT 7SM SCT006 SCT010 12/08 A2952 RMK AO1 |
| 13:45 CST |  Overcast | 11°C / 52°F | 8°C / 46°F | 82% | 1000 mb (29.53 in) | SSE 17 kph (SSE 10.4 mph) | - | 4SM |
| | KSEP 081945Z AUTO 20009G17KT 4SM OVC006 11/08 A2953 RMK AO1 |
| 13:27 CST |  Overcast | 9°C / 48°F | 7°C / 45°F | 87% | 1000 mb (29.53 in) | SSE 24 kph (SSE 15 mph) | - | 3SM |
| | KSEP 081927Z AUTO 20013G18KT 3SM OVC006 09/07 A2954 RMK AO1 |
| 13:05 CST |  Overcast | 9°C / 48°F | 7°C / 45°F | 87% | 1001 mb (29.56 in) | SW 19 kph (SW 11.5 mph) | - | 4SM |
| | KSEP 081905Z AUTO 21010KT 4SM OVC006 09/07 A2956 RMK AO1 |
| 12:45 CST |  Overcast | 8°C / 46°F | 7°C / 45°F | 93% | 1001 mb (29.56 in) | SW 15 kph (SW 9.2 mph) | - | 2 1/2SM |
| | KSEP 081845Z AUTO 21008G14KT 2 1/2SM OVC006 08/07 A2957 RMK AO1 |
| 12:25 CST |  Overcast | 8°C / 46°F | 6°C / 43°F | 87% | 1002 mb (29.59 in) | SW 20 kph (SW 12.7 mph) | - | 2 1/2SM |
| | KSEP 081825Z AUTO 21011KT 2 1/2SM OVC004 08/06 A2960 RMK AO1 |
| 12:05 CST |  Overcast | 7°C / 45°F | 6°C / 43°F | 93% | 1003 mb (29.62 in) | SW 13 kph (SW 8.1 mph) | - | 1 3/4SM |
| | KSEP 081805Z AUTO 21007KT 1 3/4SM OVC004 07/06 A2962 RMK AO1 |
| 11:47 CST |  Overcast | 6°C / 43°F | 5°C / 41°F | 93% | 1004 mb (29.65 in) | SSE 9 kph (SSE 5.8 mph) | - | 2SM |
| | KSEP 081747Z AUTO 20005KT 2SM OVC004 06/05 A2964 RMK AO1 |
| 11:25 CST |  Overcast | 6°C / 43°F | 4°C / 39°F | 87% | 1004 mb (29.65 in) | SSE 7 kph (SSE 4.6 mph) | - | 2SM |
| | KSEP 081725Z AUTO 20004KT 2SM OVC004 06/04 A2966 RMK AO1 |
| 11:05 CST |  Overcast | 5°C / 41°F | 4°C / 39°F | 93% | 1005 mb (29.68 in) | S 13 kph (S 8.1 mph) | - | 1 3/4SM |
| | KSEP 081705Z AUTO 18007KT 1 3/4SM OVC004 05/04 A2967 RMK AO1 |
| 10:27 CST |  Overcast | 4°C / 39°F | 3°C / 37°F | 93% | 1006 mb (29.71 in) | S 7 kph (S 4.6 mph) | - | 2 1/2SM |
| | KSEP 081627Z AUTO 19004KT 2 1/2SM OVC004 04/03 A2970 RMK AO1 |
| 10:08 CST |  Overcast | 4°C / 39°F | 3°C / 37°F | 93% | 1006 mb (29.71 in) | S 6 kph (S 3.5 mph) | - | 3SM |
| | KSEP 081608Z AUTO 19003KT 3SM OVC004 04/03 A2972 RMK AO1 |
| 09:45 CST |  Overcast | 3°C / 37°F | 3°C / 37°F | 100% | 1007 mb (29.74 in) | Calm | - | 3SM |
| | KSEP 081545Z AUTO 00000KT 3SM BKN004 OVC011 03/03 A2973 RMK AO1 |
| 09:08 CST |  Overcast | 3°C / 37°F | 2°C / 36°F | 93% | 1007 mb (29.74 in) | Calm | - | 2 1/2SM |
| | KSEP 081508Z AUTO 00000KT 2 1/2SM OVC004 03/02 A2974 RMK AO1 |
| 08:48 CST |  Overcast | 3°C / 37°F | 2°C / 36°F | 93% | 1007 mb (29.74 in) | Calm | - | 1 1/4SM |
| | KSEP 081448Z AUTO 00000KT 1 1/4SM OVC004 03/02 A2975 RMK AO1 |
| 08:25 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | NW 6 kph (NW 3.5 mph) | - | 1SM |
| | KSEP 081425Z AUTO 30003KT 1SM OVC007 02/02 A2976 RMK AO1 |
| 08:05 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | - | 1 1/4SM |
| | KSEP 081405Z AUTO 00000KT 1 1/4SM BKN005 OVC009 02/02 A2976 RMK AO1 |
| 07:45 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | 0.25 mm (0.01 in) | 1 1/4SM |
| | KSEP 081345Z AUTO 00000KT 1 1/4SM OVC003 02/02 A2977 RMK AO1 P0001 |
| 07:25 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | NW 6 kph (NW 3.5 mph) | 0.25 mm (0.01 in) | 1 1/4SM |
| | KSEP 081325Z AUTO 30003KT 1 1/4SM OVC003 02/02 A2977 RMK AO1 P0001 |
| 07:05 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | 0.25 mm (0.01 in) | 1 3/4SM |
| | KSEP 081305Z AUTO 00000KT 1 3/4SM OVC003 02/02 A2978 RMK AO1 P0001 |
| 06:47 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | WNW 7 kph (WNW 4.6 mph) | - | 1 1/4SM |
| | KSEP 081247Z AUTO 29004KT 1 1/4SM OVC001 02/02 A2978 RMK AO1 |
| 06:25 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | NNW 6 kph (NNW 3.5 mph) | - | 3/4SM |
| | KSEP 081225Z AUTO 34003KT 3/4SM OVC001 02/02 A2978 RMK AO1 |
| 06:05 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | - | 3/4SM |
| | KSEP 081205Z AUTO 00000KT 3/4SM OVC001 02/02 A2978 RMK AO1 |
| 05:45 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | - | 3/4SM |
| | KSEP 081145Z AUTO 00000KT 3/4SM OVC001 02/02 A2978 RMK AO1 |
| 05:26 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | N 6 kph (N 3.5 mph) | - | 3/4SM |
| | KSEP 081126Z AUTO 36003KT 3/4SM OVC001 02/02 A2978 RMK AO1 |
| 05:05 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | Calm | - | 3/4SM |
| | KSEP 081105Z AUTO 00000KT 3/4SM OVC001 02/02 A2977 RMK AO1 |
| 04:45 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1008 mb (29.77 in) | NNE 6 kph (NNE 3.5 mph) | - | 3/4SM |
| | KSEP 081045Z AUTO 02003KT 3/4SM OVC001 02/02 A2978 RMK AO1 |
| 04:25 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1009 mb (29.8 in) | Calm | - | 3/4SM |
| | KSEP 081025Z AUTO 00000KT 3/4SM OVC001 02/02 A2981 RMK AO1 |
| 04:05 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1009 mb (29.8 in) | NE 6 kph (NE 3.5 mph) | - | 3/4SM |
| | KSEP 081005Z AUTO 03003KT 3/4SM OVC001 02/02 A2981 RMK AO1 |
| 03:45 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1010 mb (29.83 in) | Calm | - | 3/4SM |
| | KSEP 080945Z AUTO 00000KT 3/4SM OVC001 02/02 A2983 RMK AO1 |
| 03:27 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1011 mb (29.85 in) | NE 7 kph (NE 4.6 mph) | - | 3/4SM |
| | KSEP 080927Z AUTO 03004KT 3/4SM OVC001 02/02 A2985 RMK AO1 |
| 03:05 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1011 mb (29.85 in) | NE 6 kph (NE 3.5 mph) | - | 1SM |
| | KSEP 080905Z AUTO 03003KT 1SM OVC001 02/02 A2985 RMK AO1 |
| 02:47 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1011 mb (29.85 in) | NE 9 kph (NE 5.8 mph) | - | 1 1/4SM |
| | KSEP 080847Z AUTO 03005KT 1 1/4SM OVC001 02/02 A2986 RMK AO1 |
| 02:28 CST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1011 mb (29.85 in) | NE 11 kph (NE 6.9 mph) | - | 1 1/2SM |
| | KSEP 080828Z AUTO 05006KT 1 1/2SM OVC001 02/01 A2986 RMK AO1 |
| 02:07 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1012 mb (29.88 in) | NE 7 kph (NE 4.6 mph) | - | 1SM |
| | KSEP 080807Z AUTO 03004KT 1SM OVC003 02/02 A2988 RMK AO1 |
| 01:45 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1012 mb (29.88 in) | NE 7 kph (NE 4.6 mph) | - | 1 1/4SM |
| | KSEP 080745Z AUTO 05004KT 1 1/4SM OVC003 02/02 A2989 RMK AO1 |
| 01:27 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1013 mb (29.91 in) | NE 9 kph (NE 5.8 mph) | - | 1SM |
| | KSEP 080727Z AUTO 04005KT 1SM OVC003 02/02 A2990 RMK AO1 |
| 01:07 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1013 mb (29.91 in) | NNE 6 kph (NNE 3.5 mph) | - | 1SM |
| | KSEP 080707Z AUTO 02003KT 1SM OVC003 02/02 A2992 RMK AO1 |
| 00:45 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1014 mb (29.94 in) | N 11 kph (N 6.9 mph) | - | 1 1/4SM |
| | KSEP 080645Z AUTO 36006KT 1 1/4SM OVC003 02/02 A2994 RMK AO1 |
| 00:25 CST |  Overcast | 2°C / 36°F | 2°C / 36°F | 100% | 1014 mb (29.94 in) | N 7 kph (N 4.6 mph) | - | 1 1/4SM |
| | KSEP 080625Z AUTO 01004KT 1 1/4SM OVC003 02/02 A2993 RMK AO1 |
| 00:06 CST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1014 mb (29.94 in) | NNE 7 kph (NNE 4.6 mph) | - | 1 1/4SM |
| | KSEP 080606Z AUTO 02004KT 1 1/4SM OVC003 02/01 A2994 RMK AO1 |