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 tracked across the region. Separate warning blanketed Yellowhead County as the cell ramped up. Heavy rain sparked flash flooding across low-lying areas of the metro. Whitemud Drive in west Edmonton was left closed under standing water. Major arteries shut down as crews responded to blocked intersections. Travel plans were thrown into chaos across the city, with drivers sitting out the sudden downpour.