Write an article exploring the recent cold upper-level low pressures affecting the Pacific Northwest, detailing the unusual weather patterns observed in June, such as unexpected mountain snow and thunderstorms. Incorporate expert insights from meteorologists to explain the science behind upper-level systems and their forecasting. Discuss the community responses to these weather changes, highlighting any adaptive measures or challenges faced. Conclude by reflecting on the implications of such weather anomalies in the context of climate change and future forecast expectations. Aim to engage readers with relatable narratives while providing a clear understanding of the meteorological concepts involved.