textproduct: Salt Lake City

KEY MESSAGES, Issued 1034 AM MDT Sat Aug 1 2026

- Temperatures will rise to up to 10F above seasonal normals today across the area, and this dangerous heat will bring an increased potential for heat related illness.

- A dry cold front will move through the area late Sunday into Monday, bringing temperatures below seasonal normals to northern Utah and southwest Wyoming. Increasing winds ahead of the front will bring areas of critical fire weather conditions to portions of the area.

- Temperatures are expected to steadily warm during the latter half of the upcoming week, with the potential for dangerous heat increasing again by next weekend.

DISCUSSION, Issued 1034 AM MDT Sat Aug 1 2026

Strong high pressure is centered roughly over Utah this morning, resulting in clear skies just about areawide along with generally light winds. With this ridge strengthening, temperatures will be on the rise, with afternoon highs anticipated to be up to 10F above seasonal normals. This means highs of 100F or above for all of the valleys, with lows in the 70s to around 80 for many locations providing little in the way of overnight relief. Going Heat Advisories and Extreme Heat Warnings cover the threat well.

For Sunday, the ridge gets nudged eastward by a trough moving onshore along the Pacific Northwest coast. This system will track east across Idaho and Montana through Monday, with conditions staying dry across the area. The system will have two main impacts for the forecast area: decreasing temperatures and increasing winds. There is high confidence that the trough will drop a dry cold front into the area late Sunday into Monday. As a result, temperatures will drop noticeably Monday for northern Utah and southwest Wyoming, with highs running a few degrees above seasonal normals, something that has seemed rare this summer.

Ahead of the front, west to southwest winds will pickup, most noticeably over southwestern and northeastern portions of the area. Given the very dry airmass, this will produce areas of critical fire weather conditions. Winds are also expected to become quite gusty out of the northwest over northwest Utah as the front moves through Sunday night into early Monday. Would not be surprised to see a few gusts in excess of 40 mph during this time, but there is a low chance that the duration will be long enough to warrant wind headlines. Also, given the timing of the winds, the effect on fire danger should be more limited.

Behind the trough, a zonal flow will persist into midweek, continuing to move drier air into the area. Most guidance shows the ridge redeveloping along the Pacific coast by midweek, keeping a west to northwest flow over the area for a prolonged period. Given the position of the ridge, guidance is indicating at least a small intrusion of monsoon moisture into southern Utah later in the week, but confidence remains low on the amount of moisture and how far north the moisture will advect. The presence of the ridge will also bring a general warming trend for the latter half of the upcoming week, but there remains uncertainty on the extent of the warming.

AVIATION, Issued 1148 AM MDT Sat Aug 1 2026

KSLC...VFR conditions will persist for the KSLC terminal through the period. Dry, stable, and hot conditions will continue with southerly winds persisting through mid-afternoon before a switch to a northerly lake breeze that persists through sunset.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will persist for the entire airspace through the period. Dry, stable, and hot conditions will continue with winds light and diurnally driven.

FIRE WEATHER

Strong high pressure in place is resulting in hot and dry conditions today with generally light winds. A Pacific Northwest trough will move onshore today and across Idaho and Montana through Monday, pushing a dry cold front into northern Utah late Sunday into Monday. Ahead of this front, southerly winds will become breezy during the day Sunday, combining with minimum relative humidity values in the upper single digits to lower teens to produce areas of critical fire weather conditions. Have issued a Red Flag Warning for southern Utah, the Uinta Basin, and most mountain zones. Winds will become breezy behind the front late Sunday into early Monday across northwest Utah, but believe relative humidities will be above critical values at that time. Some breezy winds could linger over southern Utah Monday, but will overall be less than Sunday, making the threat of critical fire weather conditions more localized. Dry conditions are expected to continue through at least midweek, with a chance of monsoon moisture creeping into southern Utah for the latter half of the upcoming week. Temperatures will be below normal for northern Utah Monday into Tuesday, becoming quite hot again by the upcoming weekend. Little change in temperatures is anticipated for southern Utah.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Heat Advisory until 9 PM MDT Sunday for UTZ101-114>116-120>122.

Extreme Heat Warning until 9 PM MDT Sunday for UTZ102-104>106- 123-124-128>131.

Heat Advisory until 9 PM MDT this evening for UTZ103.

Red Flag Warning from 1 PM to 10 PM MDT Sunday for UTZ479- 481>484-488-492-493-495>498.

WY...Red Flag Warning from 1 PM Sunday to 9 PM MDT Monday for WYZ277.