436
FXUS65 KSLC 100008
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
608 PM MDT SUN AUG 9 2026
KEY MESSAGES, ISSUED 1211 PM MDT SUN AUG 9 2026
- DANGEROUS HEAT WILL PERSIST ACROSS PORTIONS OF NORTHERN UTAH AND
THE LOW DESERT OF SOUTHERN UTAH ON SUNDAY BEFORE HIGH
TEMPERATURES TREND LOWER.
- 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 1211 PM MDT SUN AUG 9 2026
HIGH PRESSURE RESIDING OVER THE FOUR CORNERS
CONTINUES TO ALLOW MONSOONAL MOISTURE TO MOVE INTO THE REGION
FROM THE SOUTH. THIS MOISTURE IS PRIMARILY LIMITED TO THE MID-
LEVELS CURRENTLY, WITH DRY LOW LEVELS SUPPORTING THE THREAT OF
STRONG OUTFLOW WINDS AS THUNDERSTORMS DEVELOP AGAIN THIS
AFTERNOON. CONVECTION WILL BE FAIRLY WIDESPREAD TODAY, WITH MODEL
SOUNDINGS SUGGESTING MUCAPE AROUND 200-500 J/KG COUPLED WITH
MINIMAL SHEAR AND STEEP LOW-LEVEL LAPSE RATES...A FAVORABLE DRY
MICROBURST ENVIRONMENT. THE HREF MAXIMUM SUGGESTS UPPER-END WIND
GUSTS AROUND 50-60 MPH, PARTICULARLY ACROSS WESTERN AND SOUTHERN
UTAH WHERE INSTABILITY IS THE GREATEST.
SIMILAR TO YESTERDAY, FLASH FLOODING REMAINS A THREAT ACROSS THE
AREA DESPITE THESE DRY LOW LEVELS AND SLIGHTLY FASTER STORM
MOTIONS TODAY. THE HIGHEST RAINFALL RATES YESTERDAY WERE UP TO
0.50"/HOUR, WITH HIGH-RES GUIDANCE SUGGESTING SIMILAR RATES TODAY.
ALTHOUGH STORM MOTIONS ARE FASTER, CONVECTIVE COVERAGE IS A BIT
HIGHER TODAY, RESULTING IN THIS INCREASED THREAT OF FLASH FLOODING
OVER SENSITIVE AREAS.
MONSOONAL MOISTURE WILL CONTINUE TO GRADUALLY INCREASE THROUGH AT
LEAST WEDNESDAY, WITH STORMS TRENDING WETTER ALONGSIDE A HIGHER
FLASH FLOOD THREAT. EVEN AFTER WEDNESDAY, ALTHOUGH CONFIDENCE IS
A BIT LOWER, MOISTURE IS LIKELY TO REMAIN ELEVATED HEADING INTO
NEXT WEEKEND. A DEVELOPING TROUGH OVER THE WEST COAST IS THE
REASON FOR THIS LOWER FORECAST CONFIDENCE, WHICH MAY NUDGE THE
RIDGE AND MAIN MOISTURE PLUME EASTWARD.
AS FOR HEAT ACROSS THE REGION, ALTHOUGH HIGH TEMPERATURES HAVE
DECREASED BY A COUPLE DEGREES TODAY, NIGHTTIME CLOUD COVER LEFT MINIMUM
TEMPERATURES THIS MORNING ONLY DIPPING INTO THE UPPER-70S ALONG
THE WASATCH FRONT AND LOW- TO MID-80S DOWN IN ST. GEORGE. HEAT
EFFECTS ARE CUMULATIVE, THEREFORE HAVE CONTINUED THE GOING EXTREME
HEAT WARNINGS AND HEAT ADVISORIES FOR THESE AREAS, WHICH ARE SET
TO EXPIRE LATER THIS EVENING AS HIGH TEMPERATURES CONTINUE TO
TREND LOWER THROUGH THE WEEK. IN FACT, FORECAST HIGHS ARE
CURRENTLY DOWN TO THE LOW-80S ALONG THE WASATCH FRONT BY FRIDAY AS
THAT TROUGH DEVELOPS; THIS IS 10-15 DEGREES BELOW NORMAL.
AVIATION...KSLC
THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGH
THE DAY WITH SOME SCATTERED CLOUDS. SOUTHERLY WINDS ARE LIKELY TO
PERSIST THROUGH THE NIGHT AND INTO MONDAY MORNING. HOWEVER, THERE IS
A 40 PERCENT CHANCE THAT OUTFLOW FROM NEARBY THUNDERSTORMS WILL
BRING PERIODS OF GUSTY AND ERRATIC WINDS TO THE TERMINAL, PRIMARILY
BETWEEN 02-05Z THIS EVENING, AND A 30 PERCENT CHANCE OF THESE
THUNDERSTORMS CROSSING WITHIN 5SM OF THE TERMINAL. NORTHERLY WINDS
ARE EXPECTED TO DEVELOP AROUND 19-20Z MONDAY, BUT MAY BECOME GUSTY
AND ERRATIC DUE TO THE POTENTIAL (30% CHANCE) FOR ANOTHER ROUND OF
THUNDERSTORMS TO IMPACT THE TERMINAL BETWEEN 19-23Z.
REST OF UTAH AND SOUTHWEST WYOMING...GENERALLY VFR CONDITIONS WILL
PREVAIL ACROSS THE AIRSPACE TONIGHT INTO MONDAY. SCATTERED SHOWERS
AND THUNDERSTORMS WILL TAPER OFF AFTER 06Z, THEN REDEVELOP MONDAY
AFTERNOON. POCKETS OF HEAVY RAIN AND GUSTY WINDS MAY BRING BRIEF
MVFR CONDITIONS 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 1256 PM MDT SUN AUG 9 2026
MONSOONAL MOISTURE WILL CONTINUE TO GRADUALLY
INCREASE STATEWIDE THROUGH AT LEAST WEDNESDAY, RESULTING IN
INCREASING COVERAGE OF SHOWERS AND THUNDERSTORMS, PARTICULARLY
ACROSS HIGHER TERRAIN. TODAY, STORMS WILL FEATURE A MIX OF STRONG
OUTFLOW WINDS STATEWIDE AND SOME WETTING RAINS PRIMARILY ACROSS
SOUTHERN UTAH. WIND GUSTS COULD REACH 50-60 MPH WITH COLLAPSING
STORMS. AS MOISTURE CONTINUES TO INCREASE THIS WEEK, RELATIVE
HUMIDITIES AND WETTING RAIN CHANCES WILL INCREASE ALONGSIDE
DECREASING TEMPERATURES. DAILY AFTERNOON SHOWERS AND THUNDERSTORMS
WILL PERSIST LIKELY THROUGH THE WEEK, WITH FAIRLY LIGHT WINDS
EXPECTED OUTSIDE OF ANY OUTFLOW.
SLC WATCHES/WARNINGS/ADVISORIES
UT...EXTREME HEAT WARNING UNTIL MIDNIGHT MDT TONIGHT FOR UTZ101-102-
104-105.
HEAT ADVISORY UNTIL MIDNIGHT MDT TONIGHT FOR UTZ103-106-107-116.
EXTREME HEAT WARNING UNTIL 9 PM MDT THIS EVENING FOR UTZ123-124-
131.
WY...RED FLAG WARNING UNTIL 9 PM MDT THIS EVENING FOR WYZ277.
PUBLIC...CUNNINGHAM
AVIATION...CHENG
FIRE WEATHER...CUNNINGHAM
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page