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723 FXUS65 KBOU 262338 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 538 PM MDT Sat Sep 26 2026 .KEY MESSAGES... - Drier and warm Sunday, 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 /00Z TAFS through 00Z Monday/... Issued at 525 PM MDT Sat Sep 26 2026 Winds will become south by 02z and then turn more SSW by 05z. HRRR shows a few weak high based showers between 02z and 04z but no gusty winds expected so have not mentioned for this evening. On Sun, winds will become SE by 18z and then increase thru the aftn with gusts up to 25 mph by 21z. Have mentioned a prob30 for higher based showers beginning at 22z for APA and BJC and 23z at DIA. Brief gusty outflow winds up to 30 mph will be possible thru 03z. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...AA AVIATION...RPK