"936373129"^^ . . . . . . . . . . . . . . . . . "17600851"^^ . . "3606"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "On the evening of September 2, 1984 (Labour Day) several tornadoes hit southwestern Ontario from Windsor to London. This was the biggest severe weather event of the year for the province. During the morning hours, the surface map revealed a rather potent low pressure system (for late summer) over northern Michigan, moving to the northeast. A warm front was moving into southern Ontario and bringing with it a moist, unstable airmass. Thunderstorms were also reported across much of district during the early morning hours as well. The cold front however, was still back over Lake Michigan and tracking steadily towards the east. During the afternoon, the weather generally cleared up in the outbreak area and temperatures reached the upper 20s Celsius (low 80s F) with dewpoints in the low 20s Celsius (low 70s F)."@en . . . . "Southwest Ontario Tornado Outbreak of 1984"@en . . . . . . . . . . . . . . . "On the evening of September 2, 1984 (Labour Day) several tornadoes hit southwestern Ontario from Windsor to London. This was the biggest severe weather event of the year for the province. During the morning hours, the surface map revealed a rather potent low pressure system (for late summer) over northern Michigan, moving to the northeast."@en . . . . . . . .