Category: Climatology (Page 3 of 56)

These posts contain information about the long-term weather patterns of Boulder County. Potential topics may include 30-day weather outlooks, El Nino/La Nina, and seasonal forecasts. You will find less about the day-to-day weather, with more focus on longer trends and patterns.

This Week in Colorado Weather: February 24, 2025

February 24, 2025 / Ben Castellani

The last two weeks have been considerably colder than normal across the Front Range (thanks Flatiron Freddy!), but that changes this week as the atmospheric pendulum swings the other direction ushering in a welcomed pattern shift across all of Colorado. The week ahead will be largely dry in our area with temperatures well above normal every day except Wednesday. The beautiful conditions will continue through the upcoming weekend, but the first week of March will see a return of cooler and unsettled weather with rain and snow chances in tow.

Winter Storm Recap: Up to 20 inches of snow for some, while others didn’t even receive a single flake!

February 21, 2025 / BoulderCAST Team

Last night’s quick-hitting snowstorm hit with a bang in the southwest Denver Metro area and southern Foothills, with locally heavy snowfall up to 20″ falling in parts of Jefferson County. Elsewhere, snow amounts fell well in-line with our forecast, including some Front Range cities not receiving a single snowflake! We review how the storm unfolded, the snow totals from across the region and look ahead to the remarkably warm and sunny weather about to take center stage.

Winter Weather Update: Finally some actual snow to go with the brutal cold! Snow arrives late Thursday, heaviest across the southern Front Range

February 20, 2025 / Ben Castellani

It’s been a brutally cold week in the Boulder-Denver area with temperatures remaining entirely below freezing since Saturday morning. Up until now, we haven’t had much snow to show for this Arctic plunge, but that changes later on Thursday as we finally get some moisture and a real storm system passing through to generate widespread snowfall across the Front Range. We discuss the latest forecast details, including how models have been trending the storm further south in recent runs which will make for a tricky forecast, one with a very sharp gradient in expected snowfall totals. Let’s take a look.

This Week in Colorado Weather: February 17, 2025

February 17, 2025 / Andy

We hope you didn’t put your cold weather gear away for the season yet — another Arctic Blast will ooze into eastern Colorado this week! A strong Arctic high will entrench the region in bitter cold air through midweek, with highs during this period well below normal in the teens and 20s with lows in the single digits or slightly below zero. A few weather systems moving through in the westerly flow aloft will bring several chances for snow to the area, but for the most part accumulations will remain relatively light east of the Mountains. Temperatures will moderate by the end of the week and especially the weekend as ridging builds in from the west and the dense Arctic air retreats eastward with surprisingly warm weather not too far off on the horizon.

Premium This Weekend in Colorado Weather: Staying chilly with at least three chances for light snow

February 13, 2025 / Ben Castellani

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This Week in Colorado Weather: February 10, 2025

February 10, 2025 / Ben Castellani

Following a bitter cold and snowy January in the Front Range, the month of February so far has brought with it milder conditions. Last week we had our first 60-degree day in Boulder since just before Christmas, and even our first 70-degree day since late October. The warmer weather has been a welcomed reprieve, though it has rightfully confused some flowering plants across the area with early blooms. This warm weather was never going to last though — we’ve still got plenty of winter to go and this week will get us right back on-track with a two-part blast of Arctic air and snow headed for the Front Range. Read on for the latest details on the snowfall timing, amounts, and expected temperatures.

January 2025 Graphical Weather Review: A decisively cold & snowy start to the New Year!

February 6, 2025 / BoulderCAST Team

Hot on the heels of an extremely warm and dry end to 2024, January landed on the complete opposite end of the spectrum with well above normal snowfall and very cold conditions across much of Colorado, including here in Boulder. Here’s a quick and colorful graphical recap of our weather during January and how it relates to climatology.