Hydrologic Failure — How Every Season Conspired to Produce Boulder’s Driest Water Year on Record

Boulder just endured its driest water year on record, closing out twelve months with only 10.65 inches of precipitation — barely half of normal and nearly at desert-level. From a failed snow season to record spring warmth and a monsoon that largely bypassed the city, every season conspired to keep Boulder locked in a warm‑and‑dry feedback loop. Reservoirs and upstream snow storage will cushion the blow for now, but the bigger question looms: what happens if we start stringing years like this together?

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This Week in Colorado Weather: October 5, 2026

A broad, slow‑moving heat dome has settled over the West, delivering a run of persistent October warmth to the Front Range — but this quiet, summerlike stretch won’t hold forever. This week will be defined by record‑challenging heat aided by downslope flow, and only the faintest chances for a few stray rain showers before a major pattern shake‑up arrives early next week. Ensemble guidance hints at everything from long‑awaited rainfall to the season’s first frost, with even a few early‑season snow scenarios lurking in the spread. Read on for all the details.

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*Premium* Storm Update – Wed 09/30/26 7:30AM | A Near‑Miss Yet Again as Soaking Storm System Only Grazes the Denver Area Today

A slow‑moving, high‑stakes storm has been creeping toward Colorado all week — a rare mash‑up of an autumn upper‑low and the juicy tropical remnants of Hurricane Polo — and for a moment, it looked like Boulder and Denver might finally score a true soaking. But as the atmosphere loves to do, the script flipped late. Today’s update breaks down how this once‑promising setup unraveled over the last couple days, why southern Colorado is now squarely in the bullseye, and what scraps of moisture the Front Range can still squeeze out as the system passes by to our south.

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