386
FXUS65 KSLC 081902
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
102 PM MDT SAT AUG 8 2026
KEY MESSAGES
- DANGEROUS HEAT WILL PERSIST ACROSS MOST OF UTAH TODAY AND ACROSS
THE NORTH ON SUNDAY. THOSE WITHOUT ACCESS TO COOLING OR PROPER
HYDRATION WILL BE MOST AT RISK FOR HEAT-RELATED ILLNESS. WITH
TEMPERATURES REMAINING ELEVATED OVERNIGHT, THERE WILL BE LITTLE
RECOVERY. HEAT STRESS IS CUMULATIVE.
- A MARGINAL RISK OF EXCESSIVE RAINFALL REMAINS OUTLOOKED ACROSS
SOUTHERN UTAH TODAY, SHIFTING NORTH AND EAST FOR SUNDAY AND
MONDAY. PERIODS OF HEAVY RAINFALL WILL POSE A FLASH FLOODING
THREAT, PARTICULARLY TO RAIN SENSITIVE BASINS.
- A MONSOONAL PATTERN LOOKS TO PERSIST INTO THE UPCOMING WEEK,
OFFERING DAILY SHOWER AND THUNDERSTORM CHANCES, AND POTENTIAL
FOR LOCALIZED EXCESSIVE RAINFALL.
DISCUSSION
HIGH PRESSURE CENTERED NEAR THE FOUR CORNERS REGION
THROUGH THE EARLY PART OF NEXT WEEK WILL ALLOW MONSOONAL MOISTURE
TO CONTINUE TO SPREAD INTO THE FORECAST AREA. THE LATEST PWAT
ANALYSIS SHOWS AROUND 1 INCH ACROSS FAR SOUTHWEST UTAH, DECREASING
NORTH AND EAST TO AROUND 0.5 INCHES ACROSS FAR NORTHEAST UTAH AND
SOUTHWEST WYOMING. HOWEVER, MODEL TRENDS SHOW PWATS TO GRADUALLY
INCREASE THROUGH THE DAY, WITH WEST-CENTRAL UTAH SEEING PWATS
CLOSER TO 0.9 INCHES BY 00Z (THOUGH EASTERN UTAH REMAINS MUCH
DRIER AT AROUND 0.6-0.7 INCHES).
ISOLATED TO SCATTERED CONVECTION CAN BE EXPECTED THIS AFTERNOON
AND EVENING, MOSTLY ALONG/NEAR THE SPINE OF UTAH AND ACROSS
SOUTHWEST THROUGH WEST-CENTRAL UTAH. POCKETS OF MODERATE RAINFALL
WERE NOTED ACROSS SOUTHWEST UTAH THE PAST COUPLE OF DAYS, SO CAN
EXPECT LOCALLY MODERATE TO HEAVY RAIN TO DEVELOP TODAY ACROSS
PORTIONS OF SOUTHERN UTAH. FARTHER NORTH, DRIER LOW LEVELS WILL
LIMIT PRECIPITATION RATES/AMOUNTS TODAY AND ALLOWING FOR MORE OF
A WIND THREAT ACROSS PORTIONS OF CENTRAL UTAH.
TOMORROW, WITH PWATS CLOSER TO 0.9-1.0 INCHES REACHING NORTHERN
AND PORTIONS OF EASTERN UTAH, MORE WIDESPREAD AND INCREASINGLY WET
SHOWERS AND THUNDERSTORMS CAN BE EXPECTED. DIURNAL SCATTERED TO
NUMEROUS CONVECTION CAN THEN BE EXPECTED THROUGH THE COMING WEEK
WITH MOISTURE REMAINING IN PLACE. WITH THIS INCREASE, THE THREAT
OF HEAVY RAIN AND FLASH FLOODING WILL INCREASE. FOR TODAY, THERE
IS A MARGINAL RISK OF EXCESSIVE RAINFALL IN SOUTHWEST UTAH. THIS
RISK SPREADS NORTH AND EAST FOR TOMORROW AND MONDAY.
TEMPERATURES TODAY WILL REMAIN QUITE HOT, WITH MANY VALLEYS SEEING
HIGH TEMPERATURES NEAR TO ABOVE 100 DEGREES. HOWEVER, THE
INCREASE IN MOISTURE WILL AID COOLER TEMPERATURES GOING FORWARD.
MANY VALLEYS ARE FORECAST TO SEE HIGHS ONLY IN THE 80S FOR THE
LATTER PART OF NEXT WEEK. BY THURSDAY, THE NBM ONLY HAS A 32%
CHANCE OF SLC REACHING 90 DEGREES, AND THAT CHANCE ONLY DECREASES
INTO NEXT WEEKEND.
AVIATION
KSLC...VFR CONDITIONS WILL PERSIST FOR THE KSLC TERMINAL THROUGH
THE PERIOD. MOSTLY DRY CONDITIONS WILL CONTINUE FOR TODAY WITH
~15% CHANCE OF AFTERNOON/EARLY EVENING CONVECTION. AFTERNOON
CONVECTION TO THE SOUTH WILL WEAKEN WITH CLOUDS AND LIGHT SHOWERS
MOVING INTO THE NORTHERN AIRSPACE OVERNIGHT THAT COULD KEEP WINDS
VARIABLE. OTHERWISE, A LIGHT NORTHERLY LAKE BREEZE WILL TRANSITION
TO A LIGHT SOUTHERLY DRAINAGE WIND OVERNIGHT.
REST OF UTAH AND SOUTHWEST WYOMING...MOSTLY VFR CONDITIONS WILL
CONTINUE FOR THE ENTIRE AIRSPACE THROUGH THE PERIOD. AFTERNOON
CONVECTION WILL DEVELOP ACROSS THE SOUTHERN 2/3RDS OF THE AIRSPACE
BRINGING LIGHTNING, GUSTY AND ERRATIC WINDS, AND BRIEF HEAVY RAIN.
CONDITIONS BECOME DRIER OVERNIGHT WITH SOME LINGERING LIGHT
SHOWERS AND CLOUDS ACROSS THE NORTHERN AIRSPACE. OTHERWISE, WINDS
WILL BE LIGHT AND DIURNALLY DRIVEN.
FIRE WEATHER, ISSUED 352 AM MDT SAT AUG 8 2026
THE WESTERN RIDGE HAS MADE ITS TREK EAST, WITH THE
CENTER NOW ROUGHLY OVER THE FOUR CORNERS, A LOCATION FAVORABLE FOR
BRINGING MONSOON MOISTURE INTO UTAH. THE MOISTURE WILL REMAIN
FOCUSED OVER SOUTHERN UTAH TODAY, BRINGING IMPROVING RELATIVE
HUMIDITY VALUES, BUT ALSO AN INCREASED THREAT OF LIGHTNING WITH
BETTER COVERAGE OF SHOWERS AND THUNDERSTORMS. THIS MOISTURE WILL
SPREAD NORTHWARD ACROSS THE REMAINDER OF UTAH SUNDAY INTO MONDAY,
WITH RELATIVE HUMIDITIES AND COVERAGE OF CONVECTION INCREASING.
THE RIDGE IS EXPECTED TO MOVE LITTLE FOR MUCH OF THE UPCOMING
WEEK, SO CONFIDENCE IS HIGH THAT MOISTURE AND INSTABILITY WILL
REMAIN IN PLACE.
SLC WATCHES/WARNINGS/ADVISORIES
UT...EXTREME HEAT WARNING UNTIL MIDNIGHT MDT SUNDAY NIGHT FOR UTZ101-
102-104-105-115-120-121.
HEAT ADVISORY UNTIL MIDNIGHT MDT SUNDAY NIGHT FOR UTZ103-106-107-
114-116.
HEAT ADVISORY UNTIL 9 PM MDT THIS EVENING FOR UTZ118-119-122-126-
127.
EXTREME HEAT WARNING UNTIL 9 PM MDT THIS EVENING FOR UTZ123-124-
128>131.
WY...NONE.
PUBLIC...CHENG
AVIATION...MAHAN
FIRE WEATHER...TRAPHAGAN
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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