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. Another 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 was left closed under standing water. Key routes shut down as crews pushed through blocked intersections. Travel plans were thrown into chaos across the city, with drivers trapped by the sudden downpour.