Waterspout potential forecast maps for both North America and Great Lakes sectors. 
Waterspout Index color key: The warmer the color, the higher the waterspout potential. Note: Waterspouts occur when both waterspout potential and low-level convergence (i.e. fronts, troughs, land breezes, etc.) are present at the same time.

Waterspout Potential Forecasts for North America and Great Lakes Sectors (3 hour time steps starting at 2 am EDT, August 15 to 2 pm EDT August 16)
North America

Great Lakes