textproduct: Salt Lake City

KEY MESSAGES, Issued 1146 AM MDT Sun Aug 2 2026

- Very hot temperatures will again bring an increased threat of heat related illness to portions of the area, with high temperatures near or above 100F expected for all valley locations.

- A dry cold front moving through the area late Sunday into Monday will drop temperatures below seasonal normals for Monday for northern Utah and southwest Wyoming as dangerous heat continues over southeast Utah.

- Breezy winds will combine with very dry conditions to produce areas of critical fire weather conditions over southwest Wyoming, Utah's mountains, and the valleys of southwest and south central Utah. Critical fire weather conditions will continue Monday for portions of southern and eastern Utah.

DISCUSSION, Issued 1146 AM MDT Sun Aug 2 2026

High pressure is centered over the Four Corners region late this morning as a trough moves onshore along the Pacific Northwest coast. Between these two features, Utah and southwest Wyoming are under a dry and breezy southwest flow. Temperatures will again be dangerously hot, with maxes similar to yesterday over central and southern Utah. Over northern Utah, temperatures will be slightly less warm due to the eastward movement of the trough, but with elevated overnight lows providing poor overnight recovery, there will still be an increased threat of heat related illness. There is a chance that wildfire smoke in the area could limit warming a bit more than what is forecast, but would also keep low temperatures elevated.

The increasing southerly winds should not get strong enough to reach advisory criteria. However, with the airmass over Utah and southwest Wyoming remaining quite dry, there will be areas of critical fire weather conditions, particularly for the mountains and portions of southern Utah. The trough itself will stay well north of the area but will bring a dry cold front into northern and central portions of the area tonight into Monday. Highs on Monday are expected to run up to 5F below seasonal normals for northern Utah. Southeastern Utah, however, will only see a slight change in temperatures, so heat will remain at dangerous levels. Thus, have extended going heat headlines for that area into Monday evening. Winds will also remain breezy ahead of the boundary over southeast Utah on Monday, bringing another day of critical fire weather conditions.

Highs Tuesday are expected to be similar to Monday under the influence of the cold front. However, there is increasing confidence that ridging will redevelop in the vicinity of the southern California coast for the middle to latter part of the upcoming week. This will bring a steady warming trend, with the threat of heat related illness expected to increase again by the upcoming weekend. There is also a chance of the position of the ridge allowing for some return of monsoon moisture to southern Utah late in the week. However, ensembles this morning look to be increasingly favoring a solution that would bring the ridge axis back overhead, keeping conditions hot and very dry.

AVIATION, Issued 1146 AM MDT Sun Aug 2 2026

KSLC, Issued 1146 AM MDT Sun Aug 2 2026... VFR conditions will persist for the KSLC terminal through the period. Dry conditions will continue with some noticeable wildfire smoke, but a significant reduction in VIS is not expected. Light northerly winds will persist through the day. Winds will become light out of the west/southwest overnight before a weak cold front arrives overnight to bring back northerly flow. There is ~40% chance that flow stays northerly overnight.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will persist for the entire airspace through the period. Dry conditions will continue with some noticeable wildfire smoke across the northern and eastern airspace, but significant VIS reduction is not expected. Winds during the day will increase out of the southwest ahead of a weak cold front that pushes into the northern airspace overnight with northerly winds behind it and southwesterly winds remaining ahead of it.

FIRE WEATHER

High pressure centered over the Four Corners will continue to dominate the weather pattern today, resulting in hot and very dry conditions across Utah once again. Southwesterly winds will become breezy today ahead of an approaching dry cold front. This combination will result in areas of critical fire weather conditions for much of Utah's mountains as well as portions of southern Utah. The front will move through northern and central Utah tonight into Monday. Areas behind the front will see temperatures drop to up to 5F below seasonal normals with a modest increase in moisture, enough for northern mountain locations to move above critical RH values. Over southern and eastern Utah, however, very dry and breezy conditions will continue, and Red Flag Warnings will be in effect Monday for those areas. Dry conditions are expected to continue thereafter with light winds prevailing. However, storm system will occasionally move over the top of the ridge during the week, bringing periods of elevated winds and the possibility of local critical fire weather conditions. Some guidance indicates a return of monsoon moisture to southern Utah late in the week, though other models indicate a longer period of hot and dry conditions.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Heat Advisory until 9 PM MDT this evening for UTZ101-103-115-116- 122.

Extreme Heat Warning until 9 PM MDT this evening for UTZ102- 104>106-123-124.

Red Flag Warning until 10 PM MDT this evening for UTZ479-488-492- 493-495>497.

Red Flag Warning until 10 PM MDT Monday for UTZ481>484-498.

Heat Advisory until 9 PM MDT Monday for UTZ114-120-121.

Red Flag Warning from noon to 10 PM MDT Monday for UTZ489.

Extreme Heat Warning until 9 PM MDT Monday for UTZ128>131.

WY...Red Flag Warning until 9 PM MDT Monday for WYZ277.