WX reports covering the period (apporx 0400Z)
CYOW 180700Z 05006KT 1 1/4SM -RA BR OVC022 01/01 A2940 RMK FG3SC5 SLP961
CYOW 180639Z 03004KT 1 1/2SM -RA BR OVC022 01/ RMK FG2SC6
CYOW 180631Z 03006KT 1 1/2SM BR OVC022 01/ RMK FG2SC6
CYOW 180600Z 04004KT 5SM BR OVC025 02/02 A2941 RMK SC8 SLP965
CYOW 180525Z 05007KT 4SM BR BKN026 OVC070 01/ RMK SC5AS3
CYOW 180500Z 11007KT 4SM -RA BR FEW012 SCT030 OVC070 02/02 A2941 RMK SF1SC2AS5 SLP967
CYOW 180420Z 13008KT 4SM -RA BR FEW012 SCT030 OVC080 02/ RMK SF1SC2AS5
CYOW 180400Z 13007KT 2SM BR SCT011 OVC030 01/01 A2945 RMK FG2SC2SC4 MOON VISBL SLP979
CYOW 180334Z 10006KT 2SM BR BKN011 OVC030 01/ RMK FG2SF4SC2
CYOW 180300Z 11005KT 3SM BR OVC008 01/01 A2949 RMK SF8 SLP993
CYOW 180254Z 11006KT 3SM BR OVC008 01/ RMK SF8