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TDetailed Forecast Discussion: he first (half) day of autumn will feel like anything but as large-scale high pressure continues to control our weather. Unseasonably warm temperatures will be the story again with highs in the middle 80's, similar to yesterday. Also not unlike a typical summer day, there will be a slight chance of afternoon and evening showers spreading eastward …

Detailed Forecast Discussion: Earlier this morning, a very weak cool front and surface boundary pushed through, barely brushing northern sections of Colorado and the Front Range. This has led to a lowering of visibility and increase in surface smoke during the morning today (below; courtesy of NOAA). There should be some improvement by the afternoon as southerly winds develop and …

Detailed Forecast Discussion: A decent area of low pressure will be skirting to our north later this afternoon and evening, tracking up into Montana by 6 PM (below). Southwest flow south of the system in our neck of the woods will bring in areas of mid and high clouds from time to time this afternoon and evening. Temperatures today will …

Detailed Forecast Discussion: We end the work week still on the mild and dry side of things. The smoke and haze will continue to be a problem, hence the Air Quality alert that has been issued over the Front Range. Try to avoid prolonged time outdoors to avoid having respiratory problems. Highs today will rise to the mid to upper …

RDetailed Forecast Discussion: idging aloft is still with us again today. The two centers of the high pressure are located to our south and west with a ridge axis extending up the spine of the Rockies into western Canada. This is shown in the GFS 500mb height anomaly forecast map below for mid-day today. This "ridgy" set-up will be present …

IDetailed Forecast Discussion: f you thought the smoke and air quality were bad yesterday, you're really not going to like today's forecast... A cool front is pushing through the area this morning with low-level winds turning northeasterly across the lower elevations. The front is so shallow and weak that it's hard to pick out in the models or even surface …

TDetailed Forecast Discussion: he typical high in Boulder on the Ides of September is 75°F. We will be considerably warmer than this today under a dominant ridge of high pressure and sunny skies. The large-scale pattern across the United States today is shown in the graphic below. Outside of Hurricane Sally, high pressure controls most of the continental United States, …