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. Separate warning blanketed Yellowhead County as the cell held together. Heavy rain triggered flash flooding across low-lying areas of the metro. Whitemud Drive in west Edmonton sat closed under standing water. Busy stretches of road shut down as crews responded to blocked intersections. Travel plans collapsed across the city, with drivers trapped by the sudden downpour.