| 17:51 CST |  Overcast | 4°C / 39°F | 1°C / 34°F | 81% | 1011 mb (29.85 in) | NNW 19 kph (NNW 11.5 mph) | - | 10SM |
| | KORD 292351Z 33010KT 10SM OVC024 04/01 A2986 RMK AO2 SLP118 60001 T00440006 10061 20044 51030 |
| 16:51 CST |  Overcast | 4°C / 39°F | 1°C / 34°F | 81% | 1010 mb (29.83 in) | NNW 28 kph (NNW 17.3 mph) | - | 10SM |
| | KORD 292251Z 34015G22KT 10SM OVC022 04/01 A2984 RMK AO2 SLP109 T00440006 |
| 15:51 CST |  Overcast | 5°C / 41°F | 2°C / 36°F | 81% | 1009 mb (29.8 in) | NNW 19 kph (NNW 11.5 mph) | - | 9SM |
| | KORD 292151Z 34010KT 9SM OVC018 05/02 A2980 RMK AO2 SLP096 T00500017 |
| 14:51 CST |  Overcast | 6°C / 43°F | 4°C / 39°F | 87% | 1008 mb (29.77 in) | NNW 15 kph (NNW 9.2 mph) | - | 7SM |
| | KORD 292051Z 34008KT 7SM SCT013 OVC020 06/04 A2977 RMK AO2 SLP086 60001 T00610039 53009 |
| 14:36 CST |  Overcast | 6°C / 43°F | 4°C / 39°F | 87% | 1008 mb (29.77 in) | NNW 11 kph (NNW 6.9 mph) | - | 7SM |
| | KORD 292036Z 34006KT 7SM SCT013 OVC020 06/04 A2978 RMK AO2 |
| 14:04 CST |  Overcast Fog And Mist | 6°C / 43°F | 4°C / 39°F | 87% | 1008 mb (29.77 in) | NNW 17 kph (NNW 10.4 mph) | - | 5SM |
| | KORD 292004Z 33009KT 5SM BR SCT009 BKN013 OVC020 06/04 A2978 RMK AO2 |
| 13:51 CST |  Overcast Fog And Mist | 6°C / 43°F | 4°C / 39°F | 87% | 1008 mb (29.77 in) | NNW 17 kph (NNW 10.4 mph) | 0.00 mm (0.00 in) | 4SM |
| | KORD 291951Z 34009KT 4SM BR OVC009 06/04 A2977 RMK AO2 RAB26E36 CIG 007V012 SLP084 P0000 T00560044 |
| 13:14 CST |  Overcast Fog And Mist | 6°C / 43°F | 4°C / 39°F | 87% | 1007 mb (29.74 in) | N 13 kph (N 8.1 mph) | - | 4SM |
| | KORD 291914Z 35007KT 4SM BR OVC007 06/04 A2975 RMK AO2 |
| 12:51 CST |  Overcast Fog And Mist | 6°C / 43°F | 4°C / 39°F | 87% | 1007 mb (29.74 in) | N 13 kph (N 8.1 mph) | 0.25 mm (0.01 in) | 2 1/2SM |
| | KORD 291851Z 36007KT 2 1/2SM BR OVC005 06/04 A2974 RMK AO2 RAE37 SLP074 P0001 T00560044 |
| 12:28 CST |  Overcast Light Rain | 6°C / 43°F | 4°C / 39°F | 87% | 1007 mb (29.74 in) | N 9 kph (N 5.8 mph) | 0.25 mm (0.01 in) | 2 1/2SM |
| | KORD 291828Z 01005KT 2 1/2SM -RA BR OVC005 06/04 A2974 RMK AO2 P0001 |
| 11:51 CST |  Overcast Light Rain | 6°C / 43°F | 4°C / 39°F | 87% | 1007 mb (29.74 in) | N 15 kph (N 9.2 mph) | 0.00 mm (0.00 in) | 3SM |
| | KORD 291751Z 36008KT 3SM -RA BR OVC005 06/04 A2974 RMK AO2 RAB20 SLP076 P0000 60001 T00560044 10067 20017 56005 |
| 11:07 CST |  Overcast Fog And Mist | 6°C / 43°F | 5°C / 41°F | 93% | 1007 mb (29.74 in) | NNW 20 kph (NNW 12.7 mph) | - | 3SM |
| | KORD 291707Z 34011KT 3SM BR OVC005 06/05 A2975 RMK AO2 |
| 10:51 CST |  Overcast Fog And Mist | 7°C / 45°F | 6°C / 43°F | 93% | 1007 mb (29.74 in) | NNW 19 kph (NNW 11.5 mph) | - | 2 1/2SM |
| | KORD 291651Z 34010KT 2 1/2SM BR OVC005 07/06 A2975 RMK AO2 SLP077 T00670056 |
| 10:24 CST |  Overcast Fog And Mist | 7°C / 45°F | 6°C / 43°F | 93% | 1007 mb (29.74 in) | N 13 kph (N 8.1 mph) | - | 2 1/2SM |
| | KORD 291624Z 35007KT 2 1/2SM BR BKN005 OVC060 07/06 A2975 RMK AO2 |
| 10:15 CST |  Overcast Fog And Mist | 7°C / 45°F | 6°C / 43°F | 93% | 1007 mb (29.74 in) | NNW 17 kph (NNW 10.4 mph) | - | 2 1/2SM |
| | KORD 291615Z 34009KT 2 1/2SM BR SCT005 BKN060 OVC080 07/06 A2975 RMK AO2 |
| 09:51 CST |  Overcast Fog And Mist | 6°C / 43°F | 5°C / 41°F | 93% | 1007 mb (29.74 in) | N 9 kph (N 5.8 mph) | 0.00 mm (0.00 in) | 2 1/2SM |
| | KORD 291551Z 01005KT 2 1/2SM BR OVC070 06/05 A2973 RMK AO2 TSE11RAE04 SLP071 P0000 T00610050 |
| 09:17 CST |  Overcast Fog And Mist | 6°C / 43°F | 4°C / 39°F | 87% | 1007 mb (29.74 in) | N 9 kph (N 5.8 mph) | 0.00 mm (0.00 in) | 2SM |
| | KORD 291517Z 01005KT 2SM BR FEW050 OVC070 06/04 A2974 RMK AO2 TSE11RAE04 OCNL LTGIC DSNT E CB DSNT E P0000 |
| 09:07 CST |  Overcast Thunder Storms | 6°C / 43°F | 4°C / 39°F | 87% | 1007 mb (29.74 in) | N 6 kph (N 3.5 mph) | 0.00 mm (0.00 in) | 2SM |
| | KORD 291507Z 36003KT 2SM TS BR FEW034CB SCT055 OVC070 06/04 A2974 RMK AO2 RAE04 OCNL LTGCC OHD TS OHD MOV NE P0000 |
| 08:51 CST |  Overcast Thunder Storms | 6°C / 43°F | 4°C / 39°F | 87% | 1008 mb (29.77 in) | NNW 9 kph (NNW 5.8 mph) | 0.25 mm (0.01 in) | 1 3/4SM |
| | KORD 291451Z 34005KT 1 3/4SM -TSRA BR FEW034CB BKN065 OVC090 06/04 A2976 RMK AO2 TSB12E38B40RAE1356B21 PRESRR SLP080 OCNL LTGCC OHD TS OHD MOV NE P0001 60001 T00560044 53010 |
| 08:46 CST |  Overcast Thunder Storms | 5°C / 41°F | 4°C / 39°F | 93% | 1007 mb (29.74 in) | NNW 11 kph (NNW 6.9 mph) | 0.00 mm (0.00 in) | 1 3/4SM |
| | KORD 291446Z 33006KT 1 3/4SM -TSRA BR FEW034CB BKN065 OVC090 05/04 A2975 RMK AO2 TSB12E38B40RAE1356B21 OCNL LTGCC OHD TS OHD MOV NE P0000 |
| 08:17 CST |  Overcast Thunder Storms | 4°C / 39°F | 4°C / 39°F | 100% | 1007 mb (29.74 in) | NNE 6 kph (NNE 3.5 mph) | 0.00 mm (0.00 in) | 3SM |
| | KORD 291417Z 02003KT 3SM TS BR FEW007 SCT009 BKN065CB OVC150 04/04 A2973 RMK AO2 TSB12RAE1356 OCNL LTGCC OHD TS SW MOV E P0000 |
| 07:51 CST |  Overcast Light Rain | 4°C / 39°F | 3°C / 37°F | 93% | 1007 mb (29.74 in) | N 7 kph (N 4.6 mph) | 0.00 mm (0.00 in) | 4SM |
| | KORD 291351Z 35004KT 4SM -RA BR SCT005 BKN012 OVC075 04/03 A2974 RMK AO2 RAB42 SLP073 P0000 T00390033 |
| 07:35 CST |  Overcast Fog And Mist | 3°C / 37°F | 3°C / 37°F | 100% | 1007 mb (29.74 in) | NNW 11 kph (NNW 6.9 mph) | - | 5SM |
| | KORD 291335Z 34006KT 5SM BR FEW005 BKN012 OVC075 03/03 A2974 RMK AO2 |
| 06:51 CST |  Overcast Fog And Mist | 3°C / 37°F | 2°C / 36°F | 93% | 1006 mb (29.71 in) | Calm | - | 6SM |
| | KORD 291251Z 00000KT 6SM BR BKN120 OVC200 03/02 A2972 RMK AO2 SLP068 T00280022 |
| 05:51 CST |  Overcast Fog And Mist | 2°C / 36°F | 1°C / 34°F | 93% | 1007 mb (29.74 in) | NW 7 kph (NW 4.6 mph) | - | 5SM |
| | KORD 291151Z 30004KT 5SM BR SCT150 OVC200 02/01 A2973 RMK AO2 SLP071 T00220011 10033 20006 58002 |
| 04:51 CST |  Overcast Fog And Mist | 2°C / 36°F | 1°C / 34°F | 93% | 1007 mb (29.74 in) | Calm | - | 6SM |
| | KORD 291051Z 00000KT 6SM BR SCT150 OVC200 02/01 A2973 RMK AO2 SLP070 T00220011 |
| 03:51 CST |  Mostly Cloudy Fog And Mist | 1°C / 34°F | 1°C / 34°F | 100% | 1007 mb (29.74 in) | Calm | - | 6SM |
| | KORD 290951Z 00000KT 6SM BR SCT150 BKN250 01/01 A2973 RMK AO2 SLP071 T00110011 |
| 02:51 CST |  Partly Cloudy Fog And Mist | 1°C / 34°F | 0°C / 32°F | 93% | 1007 mb (29.74 in) | Calm | - | 5SM |
| | KORD 290851Z 00000KT 5SM R14R/4000VP6000FT BR FEW250 01/00 A2973 RMK AO2 SLP071 T00060000 56009 |
| 01:51 CST |  Partly Cloudy | 1°C / 34°F | 0°C / 32°F | 93% | 1007 mb (29.74 in) | Calm | - | 8SM |
| | KORD 290751Z 00000KT 8SM FEW250 01/00 A2974 RMK AO2 SLP074 T00110000 |
| 00:51 CST |  Partly Cloudy | 2°C / 36°F | 1°C / 34°F | 93% | 1007 mb (29.74 in) | Calm | - | 7SM |
| | KORD 290651Z 00000KT 7SM SCT250 02/01 A2975 RMK AO2 SLP076 T00170006 |