882 FXUS65 KBOU 251113 AFDBOUArea Forecast Discussion National Weather Service Denver/Boulder CO 513 AM MDT Thu Sep 25 2025
.KEY MESSAGES...
- Warmer and dry today through Saturday.
- The next disturbance(s) will be weak, bringing scattered light precipitation late Sunday through Tuesday, mainly for the mountains.
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.DISCUSSION /Through Wednesday/... Issued at 130 PM MDT Wed Sep 24 2025
Our weather will be dominated by an upper level ridge which will build and hold across the state through Saturday. This will support sunny skies, dry conditions, warm daytime temperatures, and light winds. High temperatures each day will be several degrees above normal. A weak backdoor cold front Friday night is expected to bring slight cooling (just 2-5 degrees) to the plains for Saturday.
The next chance of any precipitation won`t arrive until late Sunday as eventually the ridge moves off to the east and a shearing trough lifts out of the Desert Southwest. For the most part, moisture associated with this trough stays to our west, and therefore the main chance of showers and storms will be confined to the mountains and western Colorado.
While there is more uncertainty in the trough position and any potential shortwaves Tuesday into Wednesday, there is reasonable agreement we`ll stay in some sort of southwest flow. Thus, the main chance of any showers or storms will stay over the mountains and western Colorado. This pattern would also be favorable for a continuation of above normal temperatures through the middle of next week.
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.AVIATION /12Z TAFS through 12Z Friday/... Issued at 509 AM MDT Thu Sep 25 2025
VFR conditions will continue thru the period. Light SSW/SW winds will be in place this morning and then will become light NNE by 20z. Winds will then trun more ELY by 23z and then SE by 02z. By 05z expect drainage winds which will continue overnight.
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.BOU WATCHES/WARNINGS/ADVISORIES... None.
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DISCUSSION...Barjenbruch AVIATION...RPK
NWS BOU Office Area Forecast Discussion