Category: Forecasting 101 (Page 1 of 3)

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

November 5, 2026 / Ben Castellani / 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.

December 2024 Graphical Weather Review: A warm and non-snowy end to 2024

January 28, 2025 / BoulderCAST Team

After a definitively wet November in the Front Range, Mother Nature did a complete one-eighty with December landing one of the warmest and least snowy on record in many locations, topped off with our first rainy Christmas in 82 years! Here’s a quick and colorful graphical recap of our weather during December and how it relates to climatology.

Front Range Snowfall Totals: January 24-26, 2025

January 26, 2025 / BoulderCAST Team

January is typically our driest month of the year, but in 2025 it’s been anything but as another round of fluffy snow dumped on the Front Range Friday night into Saturday. We briefly review both the snow totals from this single storm and the seasonal ones.

Premium BoulderCAST Daily – Thu 01/01/25| A cool & sunny start to 2025, plus a look at last night’s rogue snow shower and viewable Northern Lights

January 1, 2025 / Ben Castellani

Well, we had a bit of excitement across the area last night thanks to a small, rogue snow shower in the northern Metro that spawned to create very slick travel from southeast Boulder to Westminster to Thornton to DIA during the evening hours. This snow shower basically surfed atop of weak mid-level cold front for a couple hours dropping up …