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A Monsoon in Name Only: Inside One of Colorado’s Hottest, Driest Summers on Record

Summer 2026 is beginning to wrap-up, but before we close the books on one of Colorado’s most punishing warm‑season patterns in recent memory, we’re taking you through the full story — from the record‑warm, snow‑starved winter that set the stage, to the monsoon that never quite cohered leaving fuels critically dry statewide, to the heat dome that kept both day and night historically warm.

Read on as we break down why Boulder’s rainfall never materialized this summer, why Denver fared only marginally better, how nearly 250,000 acres burned statewide, and why half of Colorado is now in Extreme or Exceptional Drought. This summer has certainly been one for the record books, in more than one way.

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Premium BoulderCAST Daily – Wed 09/02/26 | Monsoon Shutoff, a Handful of Weak Late‑Day Storms and the Pacific Hurricane Trio

GOES‑West imagery shows a deep ribbon of anomalously dry air draped across the entire Four Corners this morning, the direct result of the monsoon plume being shoved east and effectively shut off at its source. The dry conveyor extends all the way to Hawai‘i — a full‑blown anti–Pineapple Express — while Category 4 Hurricanes Lowell and Karina, as well as …

Premium BoulderCAST Daily – Tue 09/01/26 | Persistent Monsoon Plume Exits as Sunshine Returns to the Front Range

JSunshine on the Way ust about everyone managed to squeeze out a little rain yesterday, but—as expected—totals were modest. In the context of this brutally dry summer, though, the evening showers weren’t terrible, with most spots landing a few hundredths up to roughly 0.20". Not a drought-buster, but at least a brief interruption to the dryness and a day where …

This Week in Colorado Weather: August 31, 2026

The atmosphere is gearing up for a busy stretch in Colorado, and this week’s forecast has a little bit of everything: a juicy monsoon plume to start, a sharp mid‑week dry‑out, and eventually a deep moisture surge tied to a tropical cyclone that could push the state’s moisture levels into rare territory. Whether that translates into meaningful rainfall east of the Continental Divide is the big question — and the answer hinges on timing, storm motion, and whether we can sneak in a well‑placed cold front or two. There’s plenty to watch this week for the Front Range. Let’s dig into the details.

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Premium BoulderCAST Daily – Sun 08/30/26 | Ridge Retreats, Monsoon Flow Strengthens Today into Monday

Mid‑level shortwave energy is sliding across the northern Rockies this morning, tracing the Canadian border and it will have some influence on our weather. The dominant ridge of high pressure — the same one that’s been sunbathing over Texas and New Mexico all week — gets pushed a bit east, with its center expected to wobble into Arkansas by tonight. …

Premium BoulderCAST Daily – Sat 08/29/26 | Warm with Limited Late-Day Storms

The 90s continue today as anomalously warm air overspreads the region. This warmth extends from New Mexico into Minnesota, several hundreds of miles. With low pressure to our west in the Pacific Northwest, a persistent southwest flow will continue today and Sunday, keeping temperatures in the lower 90s. As mentioned in our weekend outlook, clouds will be quite prevalent this …

Premium BoulderCAST Daily – Fri 08/28/26 | The 90s Continue with Isolated Afternoon Storms Through the Weekend

An animated 500-mb vorticity plot is shown below. The animation runs from today through Sunday. Overall, high pressure ridging will exist to our south. Meanwhile, low pressure aross the Pacific Northwest will gradually shift and translate eastward into Montana through Sunday. These two features will be watched closely, with both working to keep isolated storms in the forecast for the …

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