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 advanced across the region. Separate warning blanketed Yellowhead County as the cell kept its strength. Heavy rain triggered flash flooding across low-lying areas of the metro. Whitemud Drive in west Edmonton sat closed under standing water. Key routes shut down as crews responded to blocked intersections. Travel plans were thrown into chaos across the city, with drivers sitting out the sudden downpour.