780
FXUS65 KSLC 091210
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
610 AM MDT SUN AUG 9 2026
KEY MESSAGES, ISSUED 1101 PM MDT SAT AUG 8 2026
- DANGEROUS HEAT WILL PERSIST ACROSS PORTIONS OF NORTHERN UTAH AND
THE LOW DESERT OF SOUTHERN UTAH INTO SUNDAY.
- A MARGINAL RISK OF EXCESSIVE RAINFALL WILL CONTINUE ACROSS
PORTIONS OF UTAH THROUGH THE NEXT FIVE DAYS.
- THE THREAT OF FLASH FLOODING WILL BE MOST SIGNIFICANT ACROSS
SLOT CANYONS, NORMALLY DRY WASHES, SLICK ROCK AREAS AND RECENT
BURN SCARS.
DISCUSSION, ISSUED 1101 PM MDT SAT AUG 8 2026
HIGH PRESSURE OVER THE FOUR-CORNERS REGION WILL
CONTINUE TO SUPPORT A MONSOON SURGE INTO UTAH OVER THE NEXT 5-7
(OR MORE) DAYS. EVENING ANALYSIS INDICATES THAT A POTENTIAL MCV IS
DEVELOPING OVER CENTRAL ARIZONA. THIS MAY ROTATING AROUND THE
RIDGE INTO UTAH SUNDAY...POTENTIALLY INCREASING THE THREAT OF
FLASH FLOODING. THIS WILL BE SOMETHING TO WATCH SUNDAY.
LOOKING AT CAMS THIS EVENING, FAIRLY WIDESPREAD CONVECTION IS
FORECAST ACROSS MUCH OF THE REGION. HREF SUGGEST PEAK RAINFALL
RATES SUNDAY WILL BE BETWEEN 0.25 TO 0.50 INCHES PER HOUR,
HOWEVER, LOOKING AT GROUND TRUTH TODAY, STRONGER STORMS WERE
CAPABLE OF RATES A BIT HIGHER THAN 0.50 INCHES PER HOUR GIVEN SLOW
STORM MOTIONS.
ADJUSTED HEAT HEADLINES BASED ON LATEST TRENDS. WITH LOWS
STRUGGLING TO FALL BELOW 80 DEGREES FOR THE LOWER DESERTS OF
SOUTHERN UTAH, EXTENDED THE EXCESSIVE HEAT WARNINGS FOR LOWER
WASHINGTON COUNTY, ZION NATIONAL PARK AND GLEN CANYON NATIONAL
RECREATION AREA. EVEN THOUGH HIGHS WILL BE SLIGHTLY COOLER SUNDAY,
THE LACK OF ANY MEANINGFUL RELIEF OVERNIGHT WILL CONTINUE TO
CREATE CUMULATIVE HEAT STRESS...ESPECIALLY FOR THOSE WITHOUT
ADEQUATE COOLING AND/OR HYDRATION.
WITH COOLER TEMPERATURES FORECAST ACROSS CENTRAL UTAH, CANCELLED
GOING HEAT PRODUCTS FOR THESE AREAS.
EXPECT CONVECTION TO CONTINUE EACH AFTERNOON AND EVENING WITH AN
ATTENDANT FLASH FLOODING THREAT THROUGH AT LEAST THE NEXT 5 TO 7
DAYS.
AVIATION...KSLC
THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGH
THE DAY WITH SOME SCATTERED CLOUDS. SOUTHERLY WINDS ARE EXPECTED TO
SHIFT TO THE NORTHWEST BETWEEN 18Z AND 20Z. THERE IS A 30 PERCENT
CHANCE THAT OUTFLOW FROM THUNDERSTORMS WILL BRING PERIODS OF GUSTY
AND ERRATIC WINDS TO THE TERMINAL, PRIMARILY DURING THE LATE
AFTERNOON AND EARLY EVENING.
REST OF UTAH AND SOUTHWEST WYOMING...VFR CONDITIONS WILL PREVAIL
ACROSS THE AIRSPACE THROUGHOUT THE DAY. SCATTERED SHOWERS AND
THUNDERSTORMS WILL DEVELOP THIS AFTERNOON, PRIMARILY FOCUSED OVER
THE HIGHER TERRAIN. ANY STORMS THAT DEVELOP COULD PRODUCE GUSTY AND
ERRATIC WINDS AND CEILINGS THAT COULD RESULT IN TEMPORARY MOUNTAIN
OBSCURATIONS. 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 326 AM MDT SUN AUG 9 2026
HIGH PRESSURE CENTERED OVER THE FOUR CORNERS WILL
ALLOW MONSOON MOISTURE OVER SOUTHERN AND WESTERN UTAH TO SPREAD
NORTH AND EAST TODAY ACROSS THE REMAINDER OF THE STATE. THIS WILL
BRING INCREASING COVERAGE OF SHOWERS AND THUNDERSTORMS, PRIMARILY
FOCUSED OVER THE HIGHER TERRAIN, ALONG WITH IMPROVED RELATIVE
HUMIDITY VALUES. ANY STORMS THAT DEVELOP WILL HAVE A CHANCE OF
PRODUCING WETTING RAINFALL, BUT WILL ALSO BRING LIGHTNING AND
PERIODS OF GUSTY AND ERRATIC WINDS. THE RIDGE IS EXPECTED TO MOVE
LITTLE FOR MUCH OF THE WEEK, KEEPING THE MOISTURE IN PLACE AND
BRINGING A DAILY THREAT OF SHOWERS AND THUNDERSTORMS.
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...
AVIATION...TRAPHAGAN
FIRE WEATHER...TRAPHAGAN
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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