textproduct: Grand Junction

KEY MESSAGES

- Dry conditions persist with above normal temperatures returning to the forecast by mid week.

- Unsettled weather returns to the forecast late this week.

SHORT TERM /THROUGH TUESDAY/

Issued at 1202 AM MST Mon Dec 29 2025

Dry northwest flow aloft is expected for the next few days. Warm advection will develop today so temperatures rise a few degrees each day. Some snow covered valleys could remain trapped under strong inversions that may inhibit the warming.

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/

Issued at 340 PM MST Sun Dec 28 2025

Unsettled weather stays out of the forecast until Thursday morning. Ridging aloft will help keep the weather dry, winds calm, and daytime high temperatures around 10 degrees above normal on Tuesday and Wednesday. Ensembles are starting to find a bit more agreement on the upcoming push of anomalous moisture, although there is still disagreements regarding the details of the timing and magnitude. The moisture plume, which looks to potentially bring PWATs over 200% of normal, will advect into the CWA within west to southwesterly flow around a low pressure system off the coast of California. Presently, this moisture appears to produce somewhat continuous light snowfall, primarily over the higher terrain, as the biggest source of forcing looks to be orographic lift. Deterministic models have the closed low becoming an open wave as it crosses the Intermountain West, which would keep the associated energy on the weaker side, but the precipitation forecast could change depending on where the low tracks. Persistent anomalous warmth could allow for many areas to reach above freezing high temperatures, even along much of the higher terrain, so this brings uncertainty regarding snow ratios and snow level.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 355 AM MST Mon Dec 29 2025

VFR conditions and light terrain driven winds are expected through the taf period.

GJT WATCHES/WARNINGS/ADVISORIES

CO...None. UT...None.