Rain, Snow and Ice at 7:00 P.M.:
http://www.accuweather.com/en/us/des-moines-ia/50316/hourly-weather-forecast/328810?hour=17
Checked the weather for Ames area it does not show snow until Tuesday.
Seriously? A 14% chance? You realize caucus locations are generally not more than a couple blocks away?
So you’re inferring bad or good weather favors one or another candidate? Why would it not equally affect all of them?