Category: Monsoon (Page 1 of 15)

This Week in Colorado Weather: August 17, 2026

August 17, 2026 / Andy / 0 Comments

A series of subtle weather shifts will shape the upcoming week along the Front Range, beginning with a return to warmer temperatures and a brief interruption of monsoonal moisture. A midweek frontal passage then reintroduces instability, moisture transport, and an uptick in storm coverage — including the potential for some severe cells. Heat will rebuild late week as the ridge re-strengthens over the area, before another likely resurgence of monsoonal flow enters the discussion for next week. Read on for all the details.

Colorado Monsoon Update: Subtropical Moistures Surges to End the Week, Cooler and Storm‑Friendly Pattern Holds Through the Weekend

August 13, 2026 / BoulderCAST Team / 2 Comments

After weeks of sizzling heat and hydrological disappointment, a deep surge of monsoon moisture is pushing into the Front Range today, with precipitable water values approaching 200% of normal and a highly efficient rainfall environment already in place. Satellite imagery and overnight boundary interactions are signaling an active convective day ahead, with both severe and flooding hazards on the table Thursday. Monsoon storm chances will progressively decrease but ultimately stick around through the weekend alongside below normal temperatures. We dive into the forecast specifics, including the monsoon moisture transport, mesoscale boundaries, severe and flood risk, expected rainfall amounts, and how the weekend will play out as subtropical moisture slowly retreats.

Premium BoulderCAST Daily – Wed 08/12/26 | Today’s Heat Is the Finale — Cooler, Wetter, & Less Smoky Days Lie Ahead

August 12, 2026 / Ben Castellani

This content requires a subscription to BoulderCAST Premium.

Premium BoulderCAST Daily – Tue 08/11/26 | Cooler, Wetter Weather Takes Over Through the Extended

August 11, 2026 / Ben Castellani

This content requires a subscription to BoulderCAST Premium.

This Week in Colorado Weather: August 10, 2026

August 10, 2026 / Andy / 0 Comments

As we kick off the week, the Front Range is staring down a few more days of stubborn August heat — but that pattern is about to crack. A midweek shift will pull cooler air, deeper monsoon moisture, and widespread storms back into Colorado, including a real shot at heavy rainfall. After weeks of haze, heat, and bone‑dry afternoons, the atmosphere finally looks ready to turn the page. We break down what this transition means for the Boulder-Denver area, and how long the cooler, wetter pattern is poised to stick around.

July 2026 Graphical Weather Review: In Some Respects, Boulder’s All-Time Hottest Month on Record

August 6, 2026 / BoulderCAST Team / 0 Comments

July 2026 along the Front Range was relentlessly hot, dry, and devoid of storms, dominated by stubborn upper‑level ridging that fueled long, punishing heatwaves and pushed Denver and Boulder into one of their hottest months on record. Occasional pulses of monsoonal moisture did break through, producing slow‑moving thunderstorms and localized flash flooding near vulnerable burn scars, while wildfire smoke from the West periodically dimmed skies and degraded air quality early in the month. With meaningful rainfall largely absent, Colorado’s severe drought deepened, cementing a July defined far more by heat and haze than by the usual rhythm of afternoon thunderstorms.

Here’s a graphical look at how July 2026 unfolded across Boulder, Denver, and the Front Range — and how it compared to climatology.

This Week in Colorado Weather: August 3, 2026

August 3, 2026 / Ben Castellani / 0 Comments

A blistering heat wave will end with one of the more dynamic forecast days we’ve seen all summer. From potentially record‑setting triple‑digit heat to a late‑day cold front, gusty virga showers, and a thick wall of wildfire smoke set to drop into the Front Range tonight, Monday packs an unusually busy mix of weather hazards and changes. We’ll walk you through the timing, the impacts, and the brief but welcome multi-day cooldown ahead — plus why the heat dome isn’t done with us yet. We also look ahead to when the monsoon could return.

Colorado Forecast Update: Triple Digits & Wildfire Smoke Loom as the Monsoon Temporarily Shuts Down

July 30, 2026 / BoulderCAST Team / 0 Comments

After a lively stretch of monsoon storms and even some flooding across the state, the atmosphere is shifting in a way that favors heat, haze, and a temporary shutdown of our storm pipeline for the Front Range. A stout Southwest heat dome is about to take center stage, triple‑digit temperatures are lining up for Boulder and Denver, and wildfire smoke is poised to make an unwelcome return. We break down the ridge, the records, the smoke, and the eventual cooldown.