Category: Climatology (Page 1 of 57)

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.

Forecast Update: A rainy Memorial Day Weekend? Here’s what to expect in eastern Colorado

May 22, 2025 / Ben Castellani / 0 Comments

As we roll briskly into Memorial Day weekend, the forecast is shaping up to be a mix of weather conditions across the Front Range. Thursday and Friday will be pleasant, but by the weekend, a slow-moving weak storm system will shake things up, bringing cooler temperatures and a higher chance of showers and thunderstorms, including some severe risk. If you’ve got outdoor plans, definitely stay weather-aware, but don’t let a little rain spoil the holiday fun! Continue reading

Premium BoulderCAST Daily – Tue 05/20/25 | Gusty sunshine the next few days, plus an update on regional drought & snowpack

May 20, 2025 / Ben Castellani

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This Week in Colorado Weather: May 19, 2025

May 19, 2025 / Ben Castellani / 0 Comments

Sunday’s storms brought a slew of severe weather to northeast Colorado, including a photogenic tornado east of Denver. This week will be relatively quiet, but there is still plenty to discuss. Monday will stay cool and showery, but drier and warmer weather is on-tap for the rest of the week. However, a weekend trough will threaten to shake things up again—could the Memorial Day Weekend forecast include stormy skies? Read on for all the details.

This Week in Colorado Weather: May 12, 2025

May 12, 2025 / Andy / 0 Comments

Get ready for a preview of summer! Near-record heat will kick off the week across the Front Range, with highs soaring towards the mid to upper 80s. These temperatures could tie or break existing records, making for a sizzling start to the week. But don’t worry—relief is already on the way! A mostly dry cold front will roll through around midweek, cooling things down to more seasonable levels. While a few stray showers might pop up later in the week, the better chance for wet weather arrives over the upcoming weekend.

April 2025 Graphical Weather Review: Generally dry and mild, aside from one noteworthy snowstorm

May 9, 2025 / BoulderCAST Team / 0 Comments

April 2025 was a mild and mostly dry month across the Front Range, with almost all of the precipitation coming via a mid-month snowstorm that blanketed Boulder in 8 inches of slop. Here’s a quick and colorful graphical recap of our weather during April and how it relates to climatology.

Storm Recap: Soaking lowland rain, heavy wet snow in the Foothills

May 7, 2025 / BoulderCAST Team / 0 Comments

This week’s slow-moving spring storm drenched the Boulder-Denver area with widespread soaking rain, while elevations above 7,500 feet were blanketed in dense, heavy snow. As the storm begins to wind down, we take a look at how it unfolded and review the final rain and snow totals.

Colorado Forecast Update: Soggy weather arrives during the day Tuesday, but expected rain and snow amounts have dropped significantly

May 6, 2025 / Ben Castellani / 2 Comments

We hate to be the bearer of bad news, but almost every single weather model has taken a significant nosedive in precipitation output for the remainder of the storm Tuesday into Wednesday. We discuss this latest data, what factors have contributed to the shift, and provide our final snowfall and precipitation forecast maps for what may end up being an underwhelming spring storm in the Front Range.

This Week in Colorado Weather: May 5, 2025

May 5, 2025 / Andy / 2 Comments

Get ready for soaking rain across the lower elevations, with heavy wet snow in the higher terrain of the Front Range. A powerful spring storm will impact Colorado this week, allowing for a lengthy period of deep upslope infused with Gulf of Mexico moisture. The bulk of the storm’s energy will hit from Monday afternoon through early Wednesday, bringing a dramatic shift in weather conditions to the area. Thick clouds and precipitation will keep temperatures feeling brisk, but by the end of the week, high pressure will return, ushering in a more seasonal warmth. Just how much rain are we expecting this week? How deep will the snow pile up in the Foothills and Mountains? And how far down could the snow levels plunge at the storm’s peak? Read on as we break it all down in this week’s outlook.