textproduct: Salt Lake City

KEY MESSAGES, Issued 1056 PM MDT Sat Jul 25 2026

- Scattered showers and thunderstorms are expected over southern Utah and a portion of central Utah on Sunday, continuing the risk of heavy rainfall and flash flooding. Moisture surges northward by Tuesday, then decreases substantially Thursday forward. - Hot temperatures as high as the lower 100s can be expected for the valleys of northwest Utah as well as the Uinta Basin through Monday, with highs in the upper 100s for portions of southern Utah, including Zion National Park. Overnight lows will remain in the 70s to around 80, limiting the potential for overnight relief from the heat.

DISCUSSION

While an area of high pressure remains centered over the Four Corners region today, the overall pattern will begin to shift as an offshore trough in the PacNW region begins to chip away at the northern extent of the high. What this means for us is the introduction of an overall drier airmass as we head into the middle of the upcoming week. Hot temperatures are expected to remain in place through the next 7 days, with slight moderation through the first half of the week as a push of moisture surges ahead of the drier airmass. As the drier airmass is introduced, a resurgence of hotter temperatures is expected areawide through the remainder of the week.

Today, a subtle shortwave embedded within the southwestern portion of the high will lift into the southern half of Utah, helping to push showers and thunderstorms off terrain features later this afternoon. Ahead of this feature, regional mesoanalysis already notes a finger of enhanced PWAT values (1.2+ inches) pushing into far southwest Utah, with a broad 1 inch of PWAT extending to near Beaver County and areas east. With the presence of relatively high PWAT values across southern Utah, anticipate heavy rainfall with any storms that develop. As such, the risk of flash flooding over slot canyons, dry washes, slick rock areas, and recent burn scars will all remain a possibility through today.

This moisture will remain in place across southern Utah through at least Wednesday, raising at least an isolated concern for heavy rainfall over the aforementioned areas each day. This stream of moisture will be pushed farther northward Tuesday and Wednesday, bringing concerns of the same hazards across northern Utah. Thereafter, the trough offshore will remain in place and introduce a much drier southwest flow across Utah and southwest Wyoming. Overall chances for showers and thunderstorms are expected to decrease substantially Thursday forward, with only isolated showers and thunderstorms anticipated to form over a portion of Utah's high terrain. The overall risk of heavy rainfall will greatly decrease as this drier airmass spreads into the region.

Hot temperatures will also remain a concern through the week ahead, with minor moderation of heat expected Monday through Wednesday alongside a resurgence of heat Thursday through Saturday. While daytime high temperatures will be upwards of 5-10 degrees above average, overnight low temperatures will be the main concern as little cooling is expected to occur, raising the overall risk for heat related illness. Along the Wasatch Front, and many other areas throughout Utah, overnight low temperatures are only expected to fall into the 70s (some areas near 80 degrees!) by the minutes just before sunrise. Due to the overall lack of recovery alongside hot daytime temperatures, Heat Advisories and Extreme Heat Warnings remain in effect across various Utah valleys through at least Monday. Discussion on potential heat headlines during the second half of the week are already underway.

AVIATION

KSLC...VFR conditions to continue through the TAF period. Typical diurnal wind shifts are expected through Monday, with southerly winds this morning switching northwesterly after 19z, then switching back to southeasterly after 04z. Showers move into the Salt Lake valley after 04z, with a 15-20% chance to impact the terminal with gusty and erratic winds through 12z.

REST OF UTAH AND SOUTHWEST WYOMING...Scattered showers and thunderstorms are expected today across southern and eastern Utah, with storms capable of producing brief heavy rainfall, lightning, and gusty and erratic outflow winds to 40 kts. VFR conditions prevail overall for most regional terminals, though heavier rainfall could bring brief VIS reductions. Showers spread into northern Utah late this evening, with potential to bring gusty and erratic outflow winds through roughly 12z.

FIRE WEATHER

With moisture remaining in place across the central and southern portions of Utah, expect daily shower and thunderstorm activity each day through at least Wednesday. For northern Utah, moisture content is already beginning to decrease, bringing low chances for showers and thunderstorms for areas roughly north of the I-80 corridor. Past Wednesday, the environment will dry substantially which will allow for a downtrend in relative humidity from Thursday through Saturday. For much of Utah, afternoon relative humidity will fall back into the single-digits to low-teens. In addition to to dry afternoon conditions, very little, if any, humidity recovery is anticipated in northwestern and west-central Utah starting Thursday night. A resurgence of heat is also expected through the latter half of the week.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Heat Advisory until midnight MDT Monday night for UTZ101>107-114- 124-128-130.

Heat Advisory until 6 AM MDT Monday for UTZ116-118>120.

Extreme Heat Warning until midnight MDT Monday night for UTZ131.

WY...None.