AgWeatherNet Pictures from July 20, 2012
Sunnyside, Washington Hail Event
During the rare weather pattern that occurred on July 20th, Washington experienced a unique convergence of factors including warm air, moisture (fuel), instability, low pressure (weather disturbance), wind shear, and a dynamic cold frontal passage (trigger). The resultant weather included severe thunderstorms that featured strong winds, heavy rain and flash flooding, lightning, and large hail in some places.