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746 FXUS65 KBOU 132037 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 237 PM MDT Sat Jun 13 2026 .KEY MESSAGES... - Cool temperatures today and Sunday behind a cold front. - The best chances for showers/thunderstorms will be Sunday mainly along and south of I-70. - Temperatures heat back up next week. - Increasing fire weather concerns on Tuesday and Wednesday. && .DISCUSSION /Through Saturday/... Issued at 145 PM MDT Sat Jun 13 2026 A cold front moved through eastern Colorado last night with cool, northeast winds behind it. With dry air aloft helping to keep conditions mostly sunny, it is a pleasant day for June across most of the northern half of Colorado. Low level convergence over the Palmer Divide, southern foothills, and South Park may help to create a few showers in those locations late this afternoon and evening. The next round of even cooler air will arrive tonight in our forecast area. Low clouds currently in Wyoming are associated with a nearby shortwave trough. Temperatures in Wyoming under these clouds are mostly in the 40s and low 50s. This will move into Colorado late this evening. Highs on Sunday are expected to stay in the 60s across the plains tomorrow with mostly clouds skies. The upslope flow will likely create some drizzle in the foothills and adjacent plains. By the afternoon, there will be enough instability in the central mountains that showers and a few thunderstorms will form. The best chance for accumulating rainfall will be along and south of I-70. These storms are not expected to be severe due to lack of instability. Ridging aloft will move over Colorado on Monday providing subsidence. Temperatures will moderate from Sunday`s cool conditions but will remain below normal. West-northwesterly flow aloft will increase on Tuesday and Wednesday as 700 mb temperatures will warm rapidly. 700 mb temperatures will likely be around 17-18 C over Denver on Tuesday and near 20 C on Wednesday. This will lead to hot temperatures around 90 across the plains on Tuesday and the mid 90s on Wednesday. There will be very dry conditions and moderate downslope winds. Fire weather concerns will increase Tuesday and Wednesday with Wednesday potentially reaching critical levels. A sharp surface cold front will move through Colorado Wednesday night. This will drop temperatures to more seasonal levels on Thursday. The CPC and ensembles show a wetter pattern for Colorado by next weekend and into early the following week. There is some skepticism that there will be wetter than normal conditions at this point. && .AVIATION /18Z TAFS through 18Z Sunday/... Issued at 1205 PM MDT Sat Jun 13 2026 Winds are currently NNE with a few gusts up to 20KT being observed. Some stronger (25-30KT) gusts will be possible with a reinforcement of the NE winds between 23Z and 02Z, as well as an isolated shower. The shower potential this evening still looks to be rather low (