Wednesday may have felt underwhelming across the lower elevations of the Front Range, where lingering low clouds kept things calm and cool for much of the day — but just west of Boulder, up in the sunshine-soaked Foothills, something rare and striking took shape Wednesday afternoon. A graceful funnel cloud twisted above the mountain peaks in a spot where such phenomena almost never occur. We explore why tornadoes (and their funnel-shaped precursors) are so uncommon in Colorado’s higher terrain, and take a closer look at what makes broader Boulder County particularly adverse to tornado development.
Author: BoulderCAST Team (Page 2 of 44)
This post had major contributions from at least two members of our team. The more meteorologists the better, right?
Wednesday brought historic heat across the Front Range, with Boulder hitting a record high of 101°F—the city’s hottest day in over a decade. A weak cold front has since cooled things off slightly, ushering in a good chance of storms the next few days as well. Sunday into Monday turn drier and hotter again as reverse monsoonal flow sets up, potentially stifling our typical summer storm pattern for a bit.
While fireworks once lit up Boulder’s Fourth of July, the city has moved on from the tradition due to rising fire risks, noise concerns, crowd issues, and high costs. But there’s another reason to consider: air quality. This year’s air quality data from across the Denver Metro area revealed that Boulder’s lack of a city-run fireworks show resulted in noticeably lower pollution levels compared to neighboring cities.
A shifting weather pattern is on the way as we head into the holiday weekend along the Front Range. Thursday will bring the heat and mostly dry skies, but things could get a bit more unsettled as we head into the Fourth of July and the weekend. If you’ve got outdoor plans in the coming days, here’s what to keep an eye on.
Front Range Colorado is bracing for a scorching stretch ahead as a powerful heat dome settles in, sending daily highs into the 90s and even near 100°F come Friday. Fire danger is also set to rise with bone-dry downslope winds ramping up in the days ahead. But there’s relief on the horizon: a cold front will finally break the heatwave by Monday, bringing much cooler temps, a shot at rain, and the kind of weather we’ll certainly be ready for!
April 2025 was a mild and mostly dry month across the Front Range, with almost all of the precipitation coming via a mid-month snowstorm that blanketed Boulder in 8 inches of slop. Here’s a quick and colorful graphical recap of our weather during April and how it relates to climatology.
This week’s slow-moving spring storm drenched the Boulder-Denver area with widespread soaking rain, while elevations above 7,500 feet were blanketed in dense, heavy snow. As the storm begins to wind down, we take a look at how it unfolded and review the final rain and snow totals.
Our highly-anticipated winter storm is taking shape some 500 miles to our west Thursday morning. Change will begin across the Denver Metro area Thursday afternoon and evening with the arrival of a strong cold front. After an initial chance of isolated thunderstorms, we’ll change over to frozen precipitation fully by midnight and never look back, with light snow continuing well into Friday night. Despite lots of melting and compaction, a few to several inches of heavy wet snow are expected in Boulder and Denver, with significantly more in the nearby Foothills. We discuss the latest storm timeline, how much sloppy snow will stick, and what type of travel and vegetation impacts to expect from this late-season spring snowstorm.
Premium Storm Update (4/18/2025 8:30AM): Springtime snow is underway across the area with wet accumulations overnight up to 6 inches in the higher terrain (Estes Park) and up to 3.5 inches across the lower elevations (Boulder). We discuss the latest forecast details, including when we expect an uptick in snow coverage and intensity, how much more snow will accumulate, and when the flakes will come to an end. READ HERE
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