The orgonomic explanation of such regular repetition of cyclical events is that orgone energy pulsates at a regular rate, and this alternating expansion and contraction determines the local weather, with clear skies when the orgone field is in the expansion phase of the cycle, and rain when it is in the contraction phase. Regular cycles in the weather can be explained without recourse to any hypothetical "condensation nuclei" from motor vehicles and factory smokestacks.
12/24/11 - Why serious thunderstorms and tornados less prevalent on Weekends
For much of the last century, people in parts of the United States have come to notice that just as they got the weekends off to relax, so too did it seem, did serious weather. Big booming thunderstorms that produced large hail and/or tornados, seemed to strike at will during the week, but come the weekend, things grew quiet............. Full Article Source