textproduct: Pueblo

KEY MESSAGES

- Colder than normal temperatures stick around for today, especially for areas waking up to fresh snowfall. Clearing and drying spreads across the area throughout the morning hours, giving way to sunshine.

- The next upper storm system will impact the area Tuesday night into Thursday morning with another round of accumulating snow for much of the region.

- Northwest flow will prevail for late week into the weekend with near continuous snow across the Central Mountains.

SHORT TERM /THROUGH TONIGHT/

Issued at 223 AM MST Mon Dec 1 2025

Currently..

As of 1 AM, satellite imagery shows southeast Colorado under the passing trough axis. Radar returns show the development of secondary bands of snow forming along the mountains plains interface through Fremont, Custer, Huerfano, and western Pueblo counties. High res models handled this new development well, especially the HRRR. Areas under these new bands of snow may pick up another quick inch or two through the early morning hours. Temperatures are in the teens and low 20s across the plains, and Alamosa is currently our warmest location with a reading of 31F at 0100. Dewpoints are in the teens and 20s as well. Winds are mainly easterly on the plains. Skies are overcast. Most locations along and north of a line from around Eads to Walsenburg on the plains are seeing snow early this morning. Far northern and western portions of El Paso County have already begun to clear.

Today and Tonight..

Since the HRRR was so spot on with the timing and location of the new development along and west of I-25 early this morning, we will lean a bit more heavily on its trends this morning. Models tend to push these bands southwards as the trough axis continues to dip out south and east of us. This trend keeps pops over the southern Sangres and southern I-25 corridor through late morning, though snowfall rates still look to drop below Advisory level for the mountains near sunrise now that the best forcing has passed. This trend also allows for quick clearing from northwest to southeast throughout the morning hours, which will help to bring in some sunshine today. Temperatures will be around 5 to 10 degrees warmer than yesterday for some locations, however, we will still be well below normal and firmly in cold, northerly flow aloft. Highs look to mostly stay in the 30s on the plains, with a few locations in the far east possibly hitting low 40s, especially where no snow has fallen. The San Luis Valley also looks to warm into the upper 30s. Much of the I-25 corridor will only be a couple of degrees warmer than yesterday though, with the added bonus that many of us are waking up to our first snowfall. Though travel impacts are not expected and snow amounts are light by Colorado standards, the first snow of the season does still come with a general -take it easy on the roads this morning- type of message. Snow is expected to come to an end by Noon at the latest, and many of us will see all of our snow melted away with a quickness in the Colorado sunshine despite the cold temperatures. Clear conditions and continued cold, northerly flow aloft will make for another night of frigid temperatures as well. All of our plains are expected to see overnight lows in the teens tonight, with single digits for mountain valleys.

LONG TERM /TUESDAY THROUGH SUNDAY/

Issued at 223 AM MST Mon Dec 1 2025

Models remain in good agreement through the extended period, with an upper storm system impacting the region mid week, followed by northwesterly flow with embedded waves.

Tuesday...broad westerly flow aloft will prevail across Colorado on Tuesday as the next upper trough begins to dig south into the Great Basin. Mixing along the lee slopes will help boost temperatures across the Plains with highs reaching through the 40s and into the lower 50s. Breezy conditions will be possible in gap wind prone areas along the I-25 corridor from mid morning into the afternoon. While most of the area looks to remain dry, a few light snow showers will be possible north of Cottonwood Pass by late afternoon.

Tuesday night through Thursday...models in good agreement with the evolution and track of the upper system. Snow will increase along the Continental Divide Tuesday night into Monday morning. Meanwhile, a cold front will arrive on the Plains, with northeasterly upslope flow and cold air advection spreading across the Plains. Snow will spread eastward off the higher terrain into the Palmer Divide by morning and continue south along the I-25 corridor through early afternoon. Temperatures look cold enough for all snow with max temperatures on the Plains only reaching the upper 20s to near freezing. As the upper system tracks across Colorado, the focus for snow will shift south to along the southern Sangre de Cristo Mountains and southern I-25 corridor Wednesday night into Thursday morning. Snow looks to taper off by Thursday afternoon, hanging on the longest over the southern mountains and Raton Mesa. A quick look at the snow amount possibilities; 1 to 3 inches for the lower elevations along I-25, and 3 to 6 inches for the Mountains. It should be noted, that ensemble guidance continues to increase snow amounts from run to run, with 24 hour means closer to 3 inches for the I-25 corridor Wednesday into early Thursday. This will need to be monitored.

Friday through Monday...upper troughing will anchor to the east with upper ridging off the west coast. This will put persistent northwest flow across Colorado for the later half of the extended period. Embedded waves will bring periods of snow to the Mountains, with near continuous snowfall for the Central Mountains north of Cottonwood Pass where orographics favor northwest flow. The Plains look to remain dry during this period, with temperatures rebounding back into the 40s, to perhaps a few low 50s. Mozley

AVIATION /06Z TAFS THROUGH 06Z TUESDAY/

Issued at 1017 PM MST Sun Nov 30 2025

KCOS...

Snow will end at the very beginning of this fcst, with VFR thereafter. Light winds expected.

KPUB...

Periods of snow will last through about 09 UTC then clear out, with VFR thereafter. light winds expected.

KALS...

A period of snow will last through about 09 UTC, then clearings. Light winds thereafter.

PUB WATCHES/WARNINGS/ADVISORIES

Winter Weather Advisory until 5 AM MST early this morning for COZ058-060-068-073-075.