textproduct: Denver/Boulder

KEY MESSAGES

- Generally quiet conditions through the next several days.

- Chance of snow showers in the northern mountains on Thursday.

DISCUSSION /Through Sunday/

Issued at 158 PM MST Sun Nov 2 2025

Surface observations across the plains show widespread temperatures in the high 70s to low 80s. With the lack of cloud cover and downsloping winds, we have been able to warm up significantly this morning. At 82 degrees in Denver, we have broken today's record high (78 set in 2008 and 1931) and broken the all time monthly record high (81 set 11/17/2017). There is still a few hours left of daytime heating, so we could end up warming another degree or two if downsloping winds continue into Denver.

Ridging aloft will keep us dry for the beginning of this week. Overnight tonight, a backdoor cold front associated with a weak shortwave will usher in cooler air for Monday. Expect temperatures to be 15-20 degrees cooler, with highs in the low 60s across the plains and valleys, and 40s to 50s in the higher terrain. Surface high pressure in Wyoming will track southeast into the Great Plains, while a lee trough cyclone will develop off the foothills. With the tightening of pressure gradients between these two air masses, southeast winds will be gusting up to 30 mph across the eastern plains.

Above normal temperatures return on Tuesday and Wednesday, as the mid-level thermal ridge shifts back up over our forecast area. With cross-barrier flow of 35-45 mph, expect breezy winds across the higher terrain. Wind prone areas adjacent to the foothills may also see brief downsloping winds Tuesday morning. Localized elevated fire weather conditions are possible in the mountains, particularly in South Park where minimum relative humidity values will be in the teens, and winds gusting up to 25 mph at times.

A shortwave trough will trek across the United States on Thursday. However, ensemble guidance has continued to trend towards a more northerly track of the system, limiting precipitation chances for the higher terrain. NBM PoPs have 20-30% across the northern mountains, which seems reasonable especially for the Park Range, which would have the best change for light snow showers due to upslope enhancement. Over the weekend, another shortwave will track just north of Colorado, with another chance for orographic snow showers in the northern mountains. A cold front associated with this system will bring temperatures closer to seasonal normals along the plains. With upper level ridging building after this shortwave passes, precipitation is not expected for the plains for the foreseeable future.

AVIATION /00Z TAFS through 00Z Tuesday/

Issued at 429 PM MST Sun Nov 2 2025 VFR to continue through tonight and Monday. High clouds increase late tonight and Monday morning. Gusty northwest winds to decrease and become variable by 02Z. A cold front will bring gusty northeast winds for a couple hours beginning 05-06Z. Winds turn to the southeast by 12Z with gusts to 25 knots developing 14-15Z. A Denver cyclone is expected to form to the north of DEN and bring a wind shift to the northwest after 18Z Monday.

BOU WATCHES/WARNINGS/ADVISORIES

None.