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853 FXUS65 KBOU 262102 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 302 PM MDT Sat Sep 26 2026 .KEY MESSAGES... - Drier and warmer this weekend, with highs reaching into the 80s across the plains. - Decreasing chances (now 10%-30%) for mountain snow above 12,000ft Monday through Wednesday. - Potential for heavy rain Tuesday into Thursday, but confidence in amounts and locations remains low. && .DISCUSSION /Through Saturday/... Issued at 300 PM MDT Sat Sep 26 2026 It`s a quiet afternoon across Colorado with mostly sunny skies over the plains and fair-weather cumulus over the mountains. Rain chances for today remain low (12,000ft) that become cold enough may see daily chances for some flurries up to a dusting. Some GFS ensemble members do hint at some light mountain snow accumulations with an upper level shortwave trough next weekend, while ECMWF ensembles show zonal flow or even ridging and a return to warmer temperatures. This will be another system to watch as the week progresses. && .AVIATION /18Z TAFS through 18Z Sunday/... Issued at 1128 AM MDT Sat Sep 26 2026 VFR will persist with no shower/thunderstorms to contend with. Airmass is drying and stabilizing, with only a high based sprinkle confined to the mountains 20Z-02Z. Winds will become VRB through 20Z, and will then have a tendency to become light diurnal upslope (E-SE) at speeds under 10 kts through 23Z. Those winds will then return to normal S-SW 01Z-06Z and hold through about 16Z Sunday. After that, winds will likely (>70% chance) turn more SE and increase to speeds of 15G20-25 kts by 21Z-22Z. There will be a chance of high based shower outflows with VRB winds late, but main threat (PROB30) of that would hold off til just after 00Z Monday. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...AA AVIATION...20