Strong storms rolled in across 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. 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 sat closed under standing water. Major arteries shut down as crews rushed to blocked intersections. Travel plans were thrown into chaos across the city, with drivers sitting out the sudden downpour.