BoulderCAST

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

November 5, 2026 / / 0 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 Areas 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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Premium BoulderCAST Daily – Sun 11/01/26 | A Storm System Takes Aim on Colorado

November 1, 2026 /

Astrong storm system presently over California and the Great Basin will race east-northeastward over the next 24-36 hours, riding overhead before exiting into the Central Plains and Midwest. The system will bring heavy precipitation to southwest Colorado, as well as heavy snow in the southwest mountains. For the Plains, the details are not as clear cut, but we'll likely see …

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