textproduct: Salt Lake City

KEY MESSAGES, Issued 1037 PM MST Sun Nov 1 2026

- Accumulating mountain snow is expected across all Utah mountains through Monday morning. Upwards of 12" of snow is expected above 9000 feet, and 3-6" of snow down to around 7000 feet. Upper elevations of the Cottonwoods and western Uintas may see localized accumulations 18-24".

- Cool, dry, and stable conditions build in Tuesday following the passage of this system.

- A weak system looks to impact the region Wednesday/Thursday ushering in a brief period of low elevation rainfall and high elevation snowfall across primarily northern and central Utah.

DISCUSSION, Issued 1037 PM MST Sun Nov 1 2026

Currently, a mid-level trough is traversing across the Great Basin with its axis nearly centered along the UT/NV border. With this trough, a cold front continues to sweep across much of UT, having already traversed the western half of the state. While the lower levels are slowly drying out, weak ascent with modest moisture aloft will result in light to occasionally moderate rainfall persisting across much of the forecast area through roughly 09z. From 09z on, higher terrain will be favored for precipitation given drier low levels of the atmosphere. As such, the flood watch will be allowed to expire at 06z for southern UT and portions of central UT.

700mb temperatures will continue to cool following the passage of the cold front to roughly -3C to -4C resulting in snow levels continuing to drop through the evening to around 6500ft. Additionally, northwest flow aloft will persist, resulting in a favorable pattern for widespread mountain snow across much of Utah's high terrain. Of note, a TROWAL feature has been identified via satellite imagery serving to wrap more moisture around the northwest side of a deepening upper low located over northern UT. This has resulted in another round of widespread light to moderate rain observed across northern UT, and will also contribute to snowfall totals across our northern UT mountains. Across our UT high terrain (generally 9000ft or greater), 3-6" of additional snowfall is expected. Some areas, such as the Upper Cottonwoods and Western Uintas may see additional snowfall totals from 6-12" given favorable northwest flow orientation overnight.

Transient ridging builds in Monday in the wake of the deepening trough as it progresses east. This will result in most precipitation coming to a halt across the forecast area, though some lingering showers across the UT high terrain may persist. This feature is forecast to persist through Tuesday bringing quiescent conditions and unseasonably cool temperatures, potentially as low a 15F below seasonal normals areawide.

Ensemble guidance has come into better agreement with a weak mid- level trough sweeping through the Great Basin on Wednesday. This system is not expected to bring a whole lot of moisture with it, and with weak forcing, only light valley rainfall with light mountain snow accumulations are expected across northern and central UT. Following this system, dry conditions develop once again as ridging becomes dominant across much of the western U.S. through the remainder of the week and into the weekend.

AVIATION

KSLC...As showers wind down this morning, expect to see improving conditions, with prevailing VFR returning by 13z. However, CIGS may remain below 7kft through 15-16z with mountain top obscurations. Northerly winds will prevail before a shift to southerly drainage winds occur around 02-03z.

REST OF UTAH AND SOUTHWEST WYOMING...As showers wind down this morning, expect to see improving conditions across the airspace, with prevailing VFR returning after 13-15z at most sites. However, low CIGS may continue to result in mountain top obscurations through at least 16z. Some low-lying valleys may see fog develop tonight, with greatest potential at KLGU. West to northwest winds will be in place across most terminals today behind a cold front, with a return to diurnal drainage winds this evening.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Winter Weather Advisory until 11 AM MST this morning for UTZ111- 112.

WY...None.