BoulderCAST Daily – Wed 07/23/25 | Locally heavy rain expected as slow-moving storms bubble this afternoon and evening

After yesterday’s underwhelming rainfall—just a trace to a few hundredths of an inch around Boulder—we’ve got another shot today and again tomorrow. Monsoon moisture is still elevated, and tonight we’ll see precipitable water values spike to nearly two standard deviations above average. With weak winds aloft from the west-northwest, the setup once again favors slow-moving storms that could drop heavy rain …

Ben Castellani

Ben grew up in southwestern Pennsylvania and holds both a bachelor's and a master's degree in Meteorology, the latter being from CU Boulder. His hometown received nearly three feet of snow from the Storm of the Century back in March of 1993, sparking his initial interest in impactful weather. Ben currently works on remote sensing and data analysis software at NV5 Geospatial Software in Boulder.