Author: Ben Castellani (Page 1 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.

Premium BoulderCAST Daily – Wed 11/11/26 | Mild Days Ahead, But There Are Signs of a More Active November Soon

November 11, 2026 /

Aweak cold front slipped through Colorado yesterday, but it will be hard to even notice. The air behind the front isn't much different, and with a strong ridge of high pressure firmly anchored across the western United States, the Front Range remains locked into a stretch of sunshine and unusually mild November weather. Expect mostly sunny skies through Thursday with …

Premium BoulderCAST Daily – Tue 11/10/26 | Clouds Increase Today, But Colorado’s Dry Pattern Rolls On

November 10, 2026 /

Abroad ridge of high pressure remains firmly entrenched across the western United States today, and it will continue to dominate the weather pattern through the remainder of the work week. The result for Colorado is a familiar one: dry conditions, above-average temperatures, and generally quiet weather. But while the ridge is firmly in control, there is at least a small …

A Personal Goodbye to the American NAM Model, Retired After 20 Years

November 5, 2026 / / 2 Comments

The weather world lost a small piece of its history this week with the sunset of the American NAM model. Coincidentally, this model and my meteorology career started almost exactly the same time in 2006. Since then, both have been on quite a journey. While technology marches forward and better models take its place, it’s impossible not to reflect on the role this one played, not just in forecasting, but in shaping the career of countless meteorologists, myself included.

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Premium This Weekend in Colorado Weather: A Long Stretch of Sunshine and Dry Weather Ahead as the Denver Area Eyes Another Very Late First Snowfall

November 5, 2026 /

The midweek disturbance delivered almost exactly what was advertised, sweeping quickly across Colorado yesterday and overnight with a focused but impactful burst of precipitation. Snow fell across much of the high country, especially south of Interstate 70, while portions of southeast Colorado picked up welcome soaking rain. Radar-derived precipitation estimates show a healthy swath of moisture exceeding one-half inch extending …

Premium BoulderCAST Daily – Wed 11/04/26 | Mountain Snow Returns Today, But Denver Stays Dry

November 4, 2026 /

Happy Wednesday, everyone! A compact but fairly dynamic low pressure system is crossing Colorado today, bringing the state's next meaningful shot of precipitation later this afternoon and tonight as several favorable forcing mechanisms come together. Early morning GOES-East water vapor imagery shows the center of the low positioned just west of Salt Lake City in far northwestern Utah, with the …

Premium BoulderCAST Daily – Tue 11/03/26 | Drying Out Across Boulder and Denver as Sunshine Returns

November 3, 2026 /

The stubborn closed upper low that has been responsible for several days of unsettled weather and historic flooding across the Southwest is finally pulling away from the region. As of Tuesday morning, the center of circulation is located over central Kansas, though just enough wrap-around moisture remains on the backside of the system to generate a few isolated rain showers …

This Week in Colorado Weather: November 2, 2026

November 2, 2026 / / 0 Comments

Parts of southwest Colorado have picked up 15 to 20 inches of rain in the last 60 days, and this weekend’s storm pushed rivers across the Four Corners to historic levels with devastating results. Here on the Front Range, southwest flow kept us mostly dry again, with Sunday evening’s showers adding up to about a tenth of an inch.

The colder back half of that storm reaches us Monday. A cold front moving through this morning brings our best chance of rain from this system, though some parts of the Denver area are better positioned than others. Snow is on the way for the high country, temperatures will below normal, and another storm is approaching later this week. Here’s what to expect.

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