308
FXUS65 KSLC 062049
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
249 PM MDT THU AUG 6 2026
KEY MESSAGES
- DANGEROUS HEAT WILL IMPACT MUCH OF THE STATE THROUGH SATURDAY
ACROSS SOUTHERN UTAH, SUNDAY THE REMAINDER OF THE UTAH. 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.
- CRITICAL FIRE WEATHER CONDITIONS WILL DEVELOP ACROSS SOUTHERN
UTAH SATURDAY AS WIDELY SCATTERED THUNDERSTORMS DEVELOP AFTER A
LONG DURATION PERIOD OF VERY DRY, VERY HOT CONDITIONS. THIS WILL
SPREAD NORTH AND EAST ACROSS MUCH OF THE REMAINDER OF SOUTHERN
UTAH SUNDAY.
- A MARGINAL RISK OF EXCESSIVE RAINFALL HAS BEEN OUTLOOKED ACROSS
SOUTHERN UTAH SATURDAY, SHIFTING NORTH AND EAST SUNDAY.
DISCUSSION
HIGH PRESSURE WILL GRADUALLY SHIFT EAST OVER THE
NEXT SEVERAL DAYS...ALLOWING FOR AN INFLUX OF MOISTURE AROUND THE
WEST SIDE OF THE RIDGE. WHILE INITIALLY, THUNDERSTORMS MAY BE
SOMEWHAT HIGH-BASED, A QUICK PROGRESSION TO HEAVY RAINFALL IS
EXPECTED SATURDAY. THIS MAY ALSO BRING AN INCREASED RISK OF FLASH
FLOODING, WITH WPC OUTLOOKING PORTIONS OF SOUTHERN UTAH IN A
MARGINAL RISK FOR EXCESSIVE RAINFALL AS EARLY AS SATURDAY,
SHIFTING TO MUCH OF THE STATE SUNDAY.
THERE ISN'T MUCH INDICATION THIS PATTERN WILL BREAK DOWN IN THE
NEXT 7-10 DAYS. THE STRONGEST THUNDERSTORMS AND HEAVIEST RAIN WILL
LIKELY BE TIED TO SUBTLE SHORTWAVE TROUGHS OR MCVS EMBEDDED IN
THE FLOW. SOMETHING THAT WILL NEED TO BE MONITORED MOVING FORWARD.
THROUGH SATURDAY ACROSS SOUTHERN UTAH AND SUNDAY ACROSS THE
REMAINDER OF UTAH, EXTREME HEAT WARNINGS AND HEAT ADVISORIES
REMAIN IN EFFECT. NO CHANGES WERE MADE TO THESE PRODUCTS WITH THIS
PACKAGE. A REMINDER, WITH LOW TEMPERATURES REMAINING ELEVATED,
THERE WILL BE LITTLE RECOVERY FOR THOSE WITHOUT ADEQUATE COOLING
OR HYDRATION. HEAT STRESS IS CUMULATIVE AND THE THREAT OF HEAT-
RELATED ILLNESS WILL INCREASE WITH TIME.
FIRE WEATHER WATCHES MAY BE NEEDED FOR THE INCREASING THREAT OF
CONVECTION BY SATURDAY. SEE THE FIRE WEATHER DISCUSSION FOR MORE
DETAILS.
AVIATION...KSLC
NORTHWESTERLY WINDS WILL PREVAIL THROUGH THE
AFTERNOON, TRANSITIONING TO SOUTHEASTERLY BETWEEN 03-04Z. WHILE
VFR CONDITIONS WILL PREVAIL MOST OF THE TIME, VIS MAY DIP DOWN TO
MVFR AT TIMES JUST BEFORE SUNSET AND AFTER SUNRISE GIVEN WILDFIRE
SMOKE LINGERING ACROSS THE REGION.
REST OF UTAH AND SOUTHWEST WYOMING...WINDS WILL LARGELY BE LIGHT
AND TERRAIN-DRIVEN ACROSS THE NORTHERN TWO-THIRDS OF UTAH AND THE
EASTERN HALF OF UTAH. ACROSS SOUTHWEST UTAH, ISOLATED THUNDERSTORM
DEVELOPMENT WILL CONTINUE UNTIL ROUGHLY 02-03Z, WITH ANY STORMS
BEING CAPABLE OF PRODUCING LIGHTNING AND GUSTY OUTFLOW WINDS
AROUND 30-40KTS. VFR CONDITIONS WILL LARGELY PERSIST WITH HAZY
SKIES, THOUGH LINGERING WILDFIRE SMOKE COULD PRODUCE SLANTWISE VIS
REDUCTIONS DOWN TO MVFR ACROSS CENTRAL/NORTHERN UTAH. SITES NEAR
LOCAL WILDFIRES COULD SEE FURTHER REDUCTIONS.
FIRE WEATHER
HIGH PRESSURE WILL GRADUALLY SHIFT EASTWARD,
DRAWING MID-LEVEL MOISTURE INTO UTAH LATER FRIDAY INTO SATURDAY.
BY SATURDAY AFTERNOON, WIDELY SCATTERED THUNDERSTORMS WILL IMPACT
SOUTHWESTERN UTAH. THIS WILL COMBINE WITH A LONG DURATION OF VERY
HOT, VERY DRY CONDITIONS TO BRING THE THREAT OF CRITICAL FIRE
WEATHER CONDITIONS. AS MOISTURE DRAWS FURTHER NORTH AND EAST, MOST
OF SOUTHERN UTAH WILL SEE A RISK OF WIDELY SCATTERED
THUNDERSTORMS BRINGING THE POTENTIAL CRITICAL FIRE WEATHER
CONDITIONS TO MUCH OF SOUTHERN UTAH SUNDAY.
BY MONDAY, HUMIDITIES WILL CONTINUE TO INCREASE, ESPECIALLY
ACROSS THE HIGHER TERRAIN. THIS MONSOON SURGE WILL CONTINUE
THROUGH AT LEAST MIDWEEK.
SLC WATCHES/WARNINGS/ADVISORIES
UT...EXTREME HEAT WARNING FROM NOON FRIDAY TO MIDNIGHT MDT SUNDAY
NIGHT FOR UTZ101-102-104-105-115-120-121.
HEAT ADVISORY FROM NOON FRIDAY TO MIDNIGHT MDT SUNDAY NIGHT FOR
UTZ103-106-107-114-116.
HEAT ADVISORY UNTIL 9 PM MDT SATURDAY FOR UTZ118-119-122-126-127.
EXTREME HEAT WARNING UNTIL 9 PM MDT SATURDAY FOR UTZ123-124-
128>131.
WY...RED FLAG WARNING UNTIL 9 PM MDT THIS EVENING FOR WYZ277.
KRUSE/CUNNINGHAM
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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