Strong storms swept through Edmonton late Saturday, packing very large hail near the city limits. A tornado warning was issued for Stony Plain, west of Edmonton, as rotating clouds moved across the region. A second warning covered Yellowhead County as the cell held together. Heavy rain caused flash flooding across low-lying areas of the metro. Whitemud Drive in west Edmonton sat closed under standing water. Busy stretches of road shut down as crews rushed to blocked intersections. Travel plans fell apart across the city, with drivers slogging through the sudden downpour.