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Big change in today's weather compared to yesterday. Below shows the 500 mb map for today. A trough is moving onshore across northwestern California today. Over Colorado, northerly flow has shifted to be westerly. And in response, warmer air is in store today with highs getting into the 80's. What a difference - we were in the lower 50's yesterday. …

Strong cold front pushed through the region this morning. Below shows the regional 800 mb temperature across the west. Note that the cold front has slid through across eastern Colorado. Temperatures have turned quite chilly across the area. What a change a day makes! Behind the front, lots of low-level clouds will be around today, eventually leading to partial sunshine …

Mild day, but cold front arrives tonight!  Prepare for another mild day across the Metro area. Temperatures will top out near 80 degrees under mostly sunny skies. Don't get too comfortable with the warmth, though. A brief, but strong shot of chilly air will arrive around midnight tonight as a cold front blasts into northeast Colorado. The positional timeline of the front …

Cool down Yesterday's high temperature at BoulderCAST Station was just 63 degrees. This was our first day with below average temperatures in three weeks (since September 6th). This of course came after a morning low of 42 degrees, the coldest temperature in Boulder since late May! Can you believe it? Temperatures will rebound several degrees today, responding to abundant sunshine and …

A cold front pushed through very early this morning. Behind it, much chillier air is in place now. Below show's the mid-level pattern on this Tuesday. The surface low which brought the front through is over the Dakotas, while a secondary system is over Salt Lake City, UT. This second system will increase clouds later today and tonight and maybe …

Another mild day to end the weekend. However, some changes are on the way, but not until the coming week. At 500 mb (below) a mid-level trough has pushed inland over Idaho. Ridge of high pressure remains to its south, keeping our weather again on the warm side in the middle to possibly upper 80's with lots of sunshine. The …

Ridge in place today and much of this weekend actually. Below shows the 700 mb low to mid-level temperature across the nation. You'll notice cold air in the Pacific Northwest, associated with a trough of low pressure. This will be a player early next week...more on that below. A ridge is then situated over New Mexico, ushering in southwesterly winds …