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 advanced across the region. Separate warning covered Yellowhead County as the cell kept its strength. Heavy rain sparked flash flooding across low-lying areas of the metro. Whitemud Drive in west Edmonton ended up closed under standing water. Busy stretches of road shut down as crews responded to blocked intersections. Travel plans were thrown into chaos across the city, with drivers slogging through the sudden downpour.