National Weather Service Forecast Discussion |
Thornton Weather Forecast Today's Forecast Story |
624 FXUS65 KBOU 201926 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 1226 PM MST Fri Feb 20 2026 .KEY MESSAGES... - Light to briefly moderate snowfall expected across the mountains through late this evening. - Scattered light snow showers across the I-25 Corridor and plains this afternoon into the early evening. - Dry most of the weekend into early next week. Chilly start to the weekend, but a strong warming trend Monday and Tuesday. && .DISCUSSION /Through Friday/... Issued at 1207 PM MST Fri Feb 20 2026 A shortwave trough is moving through aloft today, bringing widespread snow to the mountains and scattered light snow to the plains. As the shortwave continues eastward this afternoon, snow chances will increase for the plains, with the best chance for snow between 3PM and 8PM today. Once we go into the late evening, precip chances will dwindle for the plains and will eventually decrease in the mountains overnight. Higher terrain could pick up an additional 1 to 5 inches with this activity today. For the plains, snow amounts are a bit more difficult. The most likely snow amounts for the plains this afternoon are a trace to an inch of snow. However some areas could see higher amounts depending on the track of the surface low. Looking at surface obs early this afternoon, the low looks to be just to the east of Denver. The circulation around this low will change the potential for upslope winds and weak surface convergence, impacting potential snow amounts. Right now, it looks like the best potential for the higher snow amounts (1+ inches) will be in areas near Lincoln County. After today, the weather should quiet down for a bit. The surface low from today will move out of the area, but a second low is expected to move in from the northeast bringing a cold front through portions of the plains tomorrow. The front should move through early Saturday morning, turning winds to the northwest behind it on the eastern plains. Winds will be breezy following the front, with winds sustained around 15 to 25mph with gusts around 30 to 40mph. Winds will remain breezy across the northeast plains of Colorado through the mid to late afternoon Saturday. The upper level trough will move off to the east this weekend and upper level ridging will build in behind it. Temperatures will warm into Tuesday and conditions will remain dry. Forecast highs for Tuesday will be around record values for Denver. Our current forecast has highs around 70 to 72 for Denver and the current record for February 24th is 71 degrees. An upper level shortwave will approach the area Wednesday into Thursday. Moisture will increase in the mountains ahead of this system. This moisture combined with potential lift from the shortwave and some orographic lift will bring back snow chances for the mountains. In the plains, a front is forecast to move through northeast Colorado sometime Wednesday into Thursday. Models are bouncing back and forth on how early they want to bring the front in, ranging anywhere from Wednesday morning to overnight Wednesday into Thursday. Post frontal winds will increase out of the northwest. Aloft a 50+ kt 700mb jet will follow the front. If we end up seeing the earlier front timing, where afternoon mixing would allow some of those stronger winds to reach the surface, we could see strong wind gusts in the plains. However, if the front is a little later and the stronger winds aloft don`t coincide with afternoon mixing, it`ll be much harder for those strong winds to make it to the surface (it will still be breezy, just not as bad). Temperatures behind the front will be a bit cooler, with highs still above normal but not quite to record levels. && .AVIATION /18Z TAFS through 18Z Saturday/... Issued at 1039 AM MST Fri Feb 20 2026 Water vapor imagery shows a robust shortwave trough over western Colorado which will provide healthy QG ascent across our forecast area through the afternoon. Ceilings have already been lower than forecast at most terminals and the trend of lower ceilings than previously forecast will likely continue. The strong forcing will likely spread high coverage (80% of area) of snow showers across the Denver metro this afternoon. When some of the more intense snow showers move over a terminal, the visibility could drop to 1 SM or slightly lower. Ceilings will be between 800-1,500 feet with these snow showers. Some blowing and drifting of snow could keep visibility around 1-2SM through around 01Z this evening as the main snow showers leave the area. Once the shortwave departs the area, snow showers will quickly come to an end around 01-02Z. Ceilings will dissipate around 04Z with VFR conditions returning the rest of the TAF period. Otherwise, winds will maintain a northerly component for the majority of the afternoon and evening. Gusts could reach 22 knots this evening with the stronger snow showers. Winds will relax later in the evening and turn towards drainage overnight. Winds will be very light during the day Saturday. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...AP AVIATION...Danielson