Author: Ben Castellani (Page 25 of 358)

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.

Wednesday Windstorm Update: Significant downslope winds and high fire danger expected from late morning into early evening

December 17, 2025 /

Hold onto your hats, Colorado—today’s forecast isn’t just another breezy afternoon. A fast‑developing mountain wave event is lining up to deliver some of the strongest winds we’ve seen in quite some time, with Boulder squarely in the bullseye for this event. We’re talking winds that can go from calm to extreme in minutes, near-critical fire danger with every gust, and even the likelihood of planned and unplanned power outages. Add in mountain snow squalls and a sharp cold front tonight, and it’s definitely a busy day in Colorado weather. Read on for the full breakdown of timing, impacts, and what you need to know to stay safe as the event unfolds.

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This Week in Colorado Weather: December 15, 2025

December 15, 2025 /

The Front Range has been defined by relentless warmth, gusty winds, and bone‑dry conditions of late—and that theme isn’t breaking anytime soon. Even with a strong cold front charging through midweek, the cooldown will be pitiful, dropping us only back to “normal” while lasting only a single day, and it comes at the price of near‑critical fire danger beforehand. With highs hovering near or above 60° almost every day leading into Christmas and precipitation chances close to zero, a brown holiday is essentially guaranteed for the Boulder–Denver area. Read on for our full outlook of our weather heading into the holiday period.

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Premium This Weekend in Colorado Weather: The December that has felt like October continues with bone dry warmth persisting into next week

December 12, 2025 /

The stubbornly warm and windy stretch we’ve been living through is finally on its way out—but not before we endure two more days of breezy conditions. The culprit, the polar jet stream, has been parked overhead funneling fast winds into Colorado all week long. By Sunday morning, it will retreat northward, giving us a brief break from the gusts. Winds …

BoulderCAST Daily – Wed 12/10/25 | A recap of the Foothills windstorm and a look at what’s next (spoiler: more wind)

December 10, 2025 /

YTuesday windstorm recap esterday’s winds were nothing short of fierce across the Foothills and Mountains. Gusts topping 70 MPH were widespread above 7,000 feet, and reanalysis data suggests that some pockets likely experienced at least one 90+ MPH gust (shown in purple on the reanalysis map below). Remember, reanalysis blends actual observations with model data to fill in the gaps—and …

Premium Storm Update – Tue 12/09/25 7:30AM | Downslope winds gusting up to 100 MPH in the Foothills today, less intense winds but still blustery for the lower elevations

December 9, 2025 /

All the ingredients have lined up perfectly for a classic mountain wave downslope windstorm, and it’s already flexing its muscles. Overnight, gusts of 70 MPH have been widespread across the Foothills, with a few spots clocking in at an eye-popping 90+ MPH. The setup is textbook: an impressive pressure gradient stretching across the Continental Divide—about 12mb from Boulder to Granby, …

This Week in Colorado Weather: December 8, 2025

December 8, 2025 /

The Front Range finally saw its first real snow of the season last week, with Boulder picking up about 8 inches and the Foothills a bit more. The Mountains then cashed in over the weekend, stacking up one to four feet of powder. While this moisture is a welcome boost to our lagging snowpack, it’s not enough to erase drought concerns—but fire risk this year looks very different than the setup before the Marshall Fire. Looking ahead, the story shifts from snow to wind: multiple high‑wind events are on tap for the Foothills this week, while Boulder and Denver stay mostly dry and mild with highs in the 50s to 60s with occasional breeziness. Read on for the full breakdown of this week’s weather.

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Premium This Weekend in Colorado Weather: Staying cool and quiet down here, but significant snow in the Mountains

December 4, 2025 /

After yesterday’s big snow dump (we’ll have a full recap later today), things are calming down across the Front Range. The storm has shifted our flow to the northwest, which is pretty dry for now, so skies will stay mostly sunny today. Thanks to that fresh blanket of snow, temperatures will run a bit cooler than they would over bare …

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