189
FXUS65 KSLC 061203
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
603 AM MDT THU AUG 6 2026
KEY MESSAGES, ISSUED 111 PM MDT WED AUG 5 2026
- AN INFLUX OF SMOKE ORIGINATING FROM NUMEROUS FIRES ACROSS THE
PACIFIC NORTHWEST WILL CONTINUE THROUGH AT LEAST THURSDAY.
- WIDESPREAD DANGEROUS HEAT DEVELOPS ACROSS SOUTHERN UTAH ON
THURSDAY, THEN BECOMES MORE WIDESPREAD ACROSS THE REMAINDER OF
UTAH FRIDAY INTO SATURDAY.
- SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING MICROBURST WINDS
ARE EXPECTED EACH AFTERNOON THURSDAY INTO THE WEEKEND, MAINLY
ACROSS SOUTHWEST UTAH.
- MONSOON MOISTURE SPREADS NORTHWARD SUNDAY INTO EARLY NEXT WEEK,
RESULTING IN MORE WIDESPREAD STORMS CAPABLE OF PRODUCING
ISOLATED FLASH FLOODING.
DISCUSSION, ISSUED 1043 PM MDT WED AUG 5 2026
WHILE THIS EVENING'S SATELLITE IMAGERY REVEALS
LARGELY CLEAR SKIES ACROSS THE REGION, SURFACE AIR QUALITY SENSORS
AROUND UTAH AND SOUTHWEST WYOMING CONTINUE TO SHOW EVIDENCE OF
WIDESPREAD SMOKE BLANKETED OVER THE FORECAST AREA. THAT SAID,
IMPROVEMENTS TO SMOKE ARE EXPECTED OVER THE NEXT 24 TO 48 HOURS AS
A RIDGE AXIS BEGINS TO SHIFT OVERHEAD, FAVORING DEEPER ATMOSPHERIC
MIXING DURING THE AFTERNOON HOURS.
AS THIS RIDGE BEGINS TO BUILD INTO THE REGION OVER THE NEXT COUPLE
OF DAYS, ANTICIPATE A STOUT DAILY WARMING TREND (3-5 DEGREES EACH
DAY) ACROSS THE NORTHERN AREA, WITH A SLOWER WARMING TREND ACROSS
THE SOUTHERN AREA (1-2 DEGREES EACH DAY) THROUGH AT LEAST FRIDAY.
BY THE END OF THE WORK WEEK, HIGH TEMPERATURES ALONG THE WASATCH
FRONT WILL CLIMB BACK INTO THE TRIPLE DIGITS, WITH UTAH'S MOJAVE
REACHING UPWARDS OF 110 TO 112 DEGREES. PAIRING WITH THE HOT
DAYTIME TEMPERATURES, OVERNIGHT LOWS WILL ONCE AGAIN CLIMB INTO
THE LOW- TO MID-70S ACROSS THE WESTERN VALLEY AREAS AND AROUND 80
DEGREES IN THE LOWER ELEVATION VALLEYS OF SOUTHERN UTAH. WHILE THE
DAYTIME HIGH TEMPERATURES WILL BE AROUND 5-10 DEGREES ABOVE
AVERAGE FOR THIS TIME OF YEAR, THE LACK OF OVERNIGHT RELIEF IS
WHERE THE REAL CONCERN WILL ARISE. A LITANY OF HEAT ADVISORIES AND
EXTREME HEAT WARNINGS WILL GO INTO EFFECT STARTING ON THURSDAY IN
SOUTHERN UTAH, EXPANDING INTO NORTHERN UTAH BY FRIDAY AS HEAT RISK
INCREASES DUE TO THE PROLONGED EXPOSURE TO HOT DAYTIME
TEMPERATURES AND ELEVATED OVERNIGHT LOWS. WHILE FRIDAY WILL MARK
THE PEAK IN THE ANTICIPATED HEAT, HOT TEMPERATURES ARE EXPECTED TO
LINGER THROUGH THE WEEKEND.
IN ADDITION TO THE HEAT, MID-LEVEL MOISTURE IS ALSO EXPECTED TO
INCREASE ACROSS A PORTION OF SOUTHERN UTAH TOMORROW, LEADING TO
THE DEVELOPMENT OF ISOLATED HIGH-BASED SHOWERS FROM ROUGHLY BALD
MOUNTAIN WESTWARD THROUGH THE UT/NV BORDER. GIVEN THE LACK OF
LOW-LEVEL MOISTURE, ANY DEVELOPING SHOWERS WILL BRING POTENTIAL
FOR STRONG MICROBURST WIND GUSTS IN EXCESS OF 40-45 MPH. AS IS THE
CASE WITH A MAJORITY OF THE SHOWER AND THUNDERSTORM ACTIVITY IN
THE GREAT BASIN REGION, ANTICIPATE DEVELOPMENT OF THESE SHOWERS
AFTER ABOUT NOON, WITH THE THREAT REMAINING IN PLACE THROUGH AT
LEAST THE LATE EVENING. THIS HIGH-BASED MOISTURE WILL REMAIN IN
PLACE THROUGH THE WEEKEND, BRINGING A DAILY THREAT FOR THESE
MICROBURST WINDS.
AS THE CENTER OF THE HIGH BEGINS TO SHIFT FARTHER EAST INTO EARLY
NEXT WEEK, LOWER LEVEL MOISTURE WILL BEGIN INCREASING WHICH WILL
BRING THE INCREASING RISK OF HEAVY RAINFALL AND FLASH FLOODING
ACROSS A PORTION OF UTAH, CENTRAL AND SOUTHERN UTAH IN PARTICULAR.
WILL CONTINUE TO MONITOR THIS POTENTIAL AS WE HEAD THROUGH THE
WEEKEND. AT THE BOTTOM LINE, ANTICIPATE A RETURN OF MONSOONAL
MOISTURE NEXT WEEK.
AVIATION
KSLC...OTHER THAN A BRIEF WINDOW OF MVFR VSBYS FROM SMOKE THIS
MORNING (12-13Z), VFR CONDITIONS ARE EXPECTED TO PREVAIL AT KSLC
THROUGH THE TAF PERIOD. DIURNAL WIND SHIFTS ARE EXPECTED TO OCCUR
WITH A NORTHWEST SHIFT AROUND 19Z.
REST OF UTAH AND SOUTHWEST WYOMING...OTHER THAN A BRIEF WINDOW OF
MVFR VSBYS FROM SMOKE THIS MORNING (12-13Z) ACROSS OUR NORTHERN UT
SITES AS WELL AS KEVW, VFR CONDITIONS ARE EXPECTED TO PREVAIL
THROUGH THE TAF PERIOD. KCDC MAY SEE DRY THUNDERSTORMS DEVELOP
AROUND 20-01Z, AS REFLECTED BY THE PROB30.
FIRE WEATHER, ISSUED 459 AM MDT THU AUG 6 2026
HIGH PRESSURE CONTINUES TO STRENGTHEN RESULTING IN
WIDESPREAD HUMIDITIES IN THE SINGLE DIGIT TO LOW TEENS WITH POOR
OVERNIGHT RECOVERIES CONTINUING THROUGH AT LEAST SATURDAY.
TEMPERATURES WILL ALSO CONTINUE WARMING, POTENTIALLY TO DANGEROUS
LEVELS STATEWIDE THIS AFTERNOON. STARTING TODAY, MOSTLY DRY
THUNDERSTORMS WILL DEVELOP ACROSS SOUTHERN UT CONTINUING INTO
SATURDAY. A STRONGER MONSOONAL MOISTURE SURGE IS EXPECTED SUNDAY,
INCREASING HUMIDITIES AND RAINFALL ASSOCIATED WITH THUNDERSTORMS
AS WELL AS INCREASING COVERAGE FOR SHOWERS AND THUNDERSTORMS
FURTHER NORTH. GUSTY AND ERRATIC WINDS UP TO 50MPH ARE POSSIBLE
WITH THUNDERSTORMS THROUGH SATURDAY ACROSS SOUTHERN UT.
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 FROM NOON TODAY TO 9 PM MDT SATURDAY FOR UTZ118-
119-122-126-127.
EXTREME HEAT WARNING FROM NOON TODAY TO 9 PM MDT SATURDAY FOR
UTZ123-124-128>131.
WY...RED FLAG WARNING FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR
WYZ277.
PUBLIC...WEBBER
AVIATION...WORSTER
FIRE WEATHER...WORSTER
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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