Skies were mostly fair on Tuesday with even the 4 AM observation reporting "clear" from the automated airport sensor in Des Moines. The featured chart looks at the frequency of having measurable precipitation for the midnight to 8 AM period the day following an hour with a given cloud coverage reported. In general, having overcast skies have more frequent rainfall events than clear skies which makes intuitive sense. Of course you have to have clouds for it to rain, so having overcast conditions later in the day leading up to the next day increases the frequency and having clear skies decreases the frequency. The overall frequency of having rainfall sometime during the 12-8 AM period in July is around 15%.

Voting:
Good = 8
Bad = 4
Abstain = 4

Tags:   clouds   jul