textproduct: Salt Lake City

KEY MESSAGES, Issued 1044 PM MDT Sun Aug 9 2026

- A marginal risk of excessive rainfall will continue across much of Utah through the next five days. Expect an increased threat of flash flooding, primarily across slot canyons, normally dry washes, slick rock areas, and recent burn scars.

DISCUSSION, Issued 1044 PM MDT Sun Aug 9 2026

High pressure will remain in a favorable location to continue the ongoing monsoon surge through at least the next seven days across the Beehive State. First though, all remaining heat headlines were allowed to expire earlier this evening.

Another round of showers and thunderstorms with the threat of heavy rainfall will develop Monday afternoon across much of the region. Again, like previous days, the most flood prone locations will continue to be slot canyons, normally dry washes, slick rock areas as well as recent burn scars.

Looking ahead, the Weather Prediction Center has Utah outlooked in a marginal risk for flash flooding through the next 5 days...and guidance suggests this monsoon surge should continue into at least next weekend if not early next week.

AVIATION...KSLC

The SLC terminal will see VFR conditions throughout the day with some scattered clouds. Southerly winds are expected to shift to the northwest between 19Z and 21Z. There is a 30 percent chance that showers in the vicinity of the terminal will bring periods of gusty and erratic winds, with this most likely to occur during the late afternoon and early evening.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions are expected across the airspace throughout the day. Scattered showers and thunderstorms will develop again later today, with the greatest coverage in the late afternoon and early evening Pockets of heavy rain and gusty winds may bring brief temporary MVFR visibilities and ceilings that could result in temporary mountain obscurations. Outside of showers and thunderstorms, generally light diurnal winds can be expected. Locally reduced visibility in smoke will occur near several large wildfires including near Richfield, near Cedar City, near Morgan, and between Ephraim and Huntington.

FIRE WEATHER, Issued 439 AM MDT Mon Aug 10 2026

High pressure will remain parked over the Four Corners region through Wednesday. The resultant southerly flow over Utah will continue to draw deep monsoon moisture northward. This will result in showers and thunderstorms developing each afternoon, focused primarily over the higher terrain, with the storms becoming wetter as the moisture continues to move into the lower levels. This pattern will bring improvement in relative humidity values and an increasing chance of wetting rainfall, though any storms that develop will be capable of producing gusty and erratic thunderstorm winds as well as lightning. The ridge is expected to move east for the latter half of the week, though a relatively moist and unstable pattern is expected to remain over the area for at least much of the remainder of the week.

SLC WATCHES/WARNINGS/ADVISORIES

UT...None. WY...Red Flag Warning from noon today to 9 PM MDT this evening for WYZ277.