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On this eve of New Year's Eve, the arctic airmass has oozed back southward into the Colorado region, and, in fact, much of the nation, including the Midwest, Ohio Valley, and northeastern United States. Some regions of the Dakotas are 20 degrees below zero! Above shows the GFS surface temperature forecast this afternoon. With a cold frontal passage, highs today …

Tight pressure gradient across the area today. As mentioned in yesterday's DayCAST, gusty west-northwest winds will be possible across the Front Range. With temperatures in the upper 50's currently, we are once again mild across the region. Some locations may reach 60 before dropping somewhat later in the afternoon. Winds may gust up to 35 mph at times, along with …

The Arctic airmass retreated right on cue yesterday morning, creating a swing in temperature of 51 degrees at BoulderCAST Station. Yesterday's timeline of temperature and dewpoint is shown below. Today will be similarly warm (50 to 55 degrees) with sunny skies overhead. Our attention shifts to the threat of strong winds tonight and tomorrow morning in the Foothills as a mountain wave sets …

This morning was the coldest of the year at BoulderCAST station (close to zero degrees). What does an Arctic airmass look like on a 800 mb temperature map? Check out the NAM forecast below for last night....the cold air is clearly banked up against the Foothills. Fortunately, this all changes today thanks to northwesterly downslope flow and a retreating high …

Merry Christmas! Thanks to a burst of snow Saturday evening, most of us will be experiencing our third White Christmas in the last four years (2015 / 2017), with more than 1" of snow on the ground today. However, we do not expect any falling snow on this Christmas for the Plains, despite an intriguing weather feature moving across southern Wyoming …

It's Christmas Eve! If any of you have Christmas plans today, be sure to drive safe. After yesterday's snowfall, we turn sunny on this Eve of Christmas with temperatures chilly in the low 30's. There is a slight chance of snow tonight and tomorrow with a weak disturbance pushing in from the northwest. This is connected with a 140 mph …

Our forecast issued yesterday for snow today and tonight looks on track. Expect a calm day across the Metro area with high temperatures in the upper 30’s under a mix of clouds and sun. A cold front arrives this evening, with isolated banded snowfall possible after sunset. Little accumulation is expected, except in the areas impacted by these bands where up to …