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Very warm Tuesday The record high for October 8th in Boulder is 86 degrees set all the way back in 1965. While it won't be quite that warm today, it will be a beautiful Tuesday with unseasonably warm temperatures and a mix of clouds and sunshine. A weak disturbance embedded in the southwest flow will pass overhead this afternoon. Before …

Another cold front moved through this morning. With it, another surge of chillier autumn air has filtered in. The mid-level pattern below shows a trough axis from Wisconsin into Colorado, the system responsible for the front. After some morning clouds, sunshine will take hold in the afternoon. We thinking highs only in the lower 60's today with the stronger push …

Another cool fall day this afternoon. Another cold front passed through from the north earlier today. Yesterday's highs ranged from the lower 80's in Denver to the lower 70's in Boulder. We may see that same difference today, but on the colder side. With lots of sunshine expected, we should be in the mid to upper 60's in Boulder and …

A deep area of low pressure is slated to track to our north this evening (below), moving through Idaho, Wyoming, and Montana. Most of the energy will be located well north of us, but clouds will drift in this afternoon after morning sunshine. It may also be a little gusty from the south-southwest with highs approaching the lower 80's today. …

Yesterday's clouds dissipating, as seen from space As the ~1030 mb surface high pressure in the northern Great Plains moved east, low-level upslope and moisture influx to the Front Range quickly relaxed with dry downslope flow winning out yesterday afternoon. The result was a welcomed lifting of the fog and drizzle and eventually a quick clearing of clouds entirely. The GOES-East visible …

Gloom to sunshine Montana has been beneath the big cut-off low pressure system for nearly a week now. This will finally change today as the system gets whisked eastward into the Great Lakes. The main trough axis will be passing across our area during the afternoon today (below, top left). At the same time, we will quickly be transitioning from the right …

A drizzly, chilly Tuesday What a change in our weather today compared to yesterday! The cold front associated with the historic storm system to our north and west has finally pushed into the Front Range. Upslope and just enough low-level moisture has saturated the lower atmosphere causing widespread fog and drizzle to develop across the Metro area and lower Foothills …