119
FXUS65 KSLC 072129
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
329 PM MDT THU AUG 7 2025
SYNOPSIS
A HOT, DRY, AND BREEZY SOUTHWEST FLOW WILL REMAIN
OVER UTAH AND SOUTHWEST WYOMING TODAY. A DRY COLD FRONT WILL
MOVE THROUGH NORTHERN UTAH TONIGHT INTO FRIDAY BEFORE STALLING,
BRINGING DECREASING WINDS BY THE WEEKEND AND A NOTICEABLE
DECREASE IN TEMPERATURES. TEMPERATURES WILL WARM UP AGAIN FOR
EARLY NEXT WEEK.
SHORT TERM (THROUGH 12Z/6AM SATURDAY)
UTAH AND SOUTHWEST
WYOMING IS STAYING HOT AND DRY THIS AFTERNOON. WINDS HAVE GOTTEN
QUITE BREEZY AHEAD OF THE PACIFIC NORTHWEST STORM SYSTEM THAT IS
MOVING INTO MONTANA THIS AFTERNOON. THE SYSTEM WILL STAY NORTH OF
THE AREA, BUT WILL DROP A DRY COLD FRONT THROUGH NORTHERN UTAH AND
SOUTHWEST WYOMING TONIGHT INTO FRIDAY MORNING BEFORE STALLING.
AHEAD OF THE FRONT, CONDITIONS ARE MAKING THE FIRE DANGER QUITE
HIGH ACROSS MUCH OF THE AREA TODAY, WITH RED FLAG WARNINGS IN
EFFECT FOR JUST ABOUT THE ENTIRE STATE. CRITICAL FIRE WEATHER
CONDITIONS WILL CONTINUE TO EXIST FRIDAY AND SATURDAY AHEAD OF THE
STALLED FRONT. SEE THE FIRE WEATHER SECTION OF THE AFD FOR MORE
DETAILS.
THE MAIN IMPACT OF THE FRONT WILL BE TO BRING NOTICEABLY LESS WARM
TEMPERATURES TO THE NORTHERN HALF OF THE FORECAST AREA. BY FRIDAY
AFTERNOON, MAXES ARE EXPECTED TO AVERAGE 10F BELOW SEASONAL
NORMALS BEHIND THE FRONT, TEMPERATURES MORE TYPICAL OF EARLY
SEPTEMBER. LITTLE CHANGE IS ANTICIPATED OVER SOUTHERN UTAH, AS
THOSE LOCATIONS WILL REMAIN AHEAD OF THE FRONT.
LONG TERM (AFTER 12Z/6AM SATURDAY), ISSUED 511 AM MDT
A
GRAZING LONGWAVE TROUGH TO THE NORTH WILL HAVE TRACKED DOWNSTREAM
BY SATURDAY. FOLLOWING THE COLD FRONT THAT WILL TRACK THROUGH THE
DAY BEFORE, SATURDAY MORNING TEMPERATURES WILL BE THE COOLEST OF
THE WEEK FOR SOUTHWEST WYOMING AND MOST OF UTAH. LOWS WILL DROP
INTO THE 40S FOR THE CACHE VALLEY AND UINTA COUNTY, WYOMING. LOWS
WILL BE IN THE 50S TO LOW 60S FOR MANY OTHER LOCATIONS IN UTAH.
LIGHTER NORTHWEST FLOW WILL BE IN PLACE FOR ALL BUT SOUTHERN UTAH
WHERE THE FRONT WILL HAVE MUCH LESS OF AN AFFECT. THERE WILL BE
LIGHTER, BUT STILL GUSTY, SOUTHWEST WINDS FOR THAT PORTION OF THE
STATE. WIND SPEEDS WILL BE LIGHTER FOR MOST LOCATIONS NORTH OF THE
FRONT, WITH THE EXCEPTION OF DOWNSLOPE AREAS IN EASTERN UTAH,
WHERE FIRE DANGER WILL STAY HIGH WITH GUSTY WINDS AND LOW RELATIVE
HUMIDITY. VALLEY HIGH TEMPERATURES WILL BE IN THE MID AND UPPER
80S IN NORTHERN UTAH, WHILE SOUTHERN UTAH VALLEY TEMPERATURES GET
INTO THE 90S, WITH 100-105F AT LAKE POWELL AND FOR LOWER
WASHINGTON COUNTY.
THE LONGWAVE TROUGH WILL LIFT FURTHER NORTH AND EAST SUNDAY,
WHILE A STRONG RIDGE TO THE SOUTHEAST RETROGRADES INTO THE WESTERN
U.S. AND PHASES INTO RIDGING IN PLACE IN THE EASTERN PACIFIC.
THAT WILL BRING A WARMING TREND TO SOUTHWEST WYOMING AND UTAH,
ESPECIALLY NORTHERN UTAH, WITH VALLEY HIGH TEMPERATURES MOSTLY IN
THE 90S BY THE END OF THE WEEKEND.
MUCH OF THE WEEK WILL BE WITH A RIDGE TO THE WEST, WITH WARMING
TEMPERATURES AND DRY CONDITIONS. THE PATTERN WILL FEATURE LIGHTER
WINDS. THERE IS MORE UNCERTAINTY LATER IN THE WEEK ON THE TRACK OF
A LONGWAVE TROUGH POSSIBLY INTO THE WESTERN U.S. ENSEMBLES RANGE
FROM THE SYSTEM SLIDING INTO WESTERN CANADA TO DIGGING INTO THE
PACNW. THE MORE SOUTHERN TRACK WOULD GRAZE SOUTHWEST WYOMING AND
UTAH, LIKELY RESULTING IN STRONGER WINDS. DEPENDING ON THE TRACK,
IT COULD BRING SHORTWAVE ENERGY AND PUSH HIGH PRESSURE TO THE
SOUTHEAST. THOSE WOULD BRING BETTER CHANCES FOR HIGH-BASED SHOWERS
AND THUNDERSTORMS.
AVIATION...KSLC
NORTHWESTERLY WINDS WILL LIKELY PREVAIL, WITH
GUSTS DROPPING OFF AFTER 01-02Z THIS EVENING. LIGHT, NORTHWESTERLY
WINDS WILL CONTINUE, THOUGH MAY BECOME LIGHT AND VARIABLE AT TIMES
OVERNIGHT. VFR CONDITIONS WILL PREVAIL.
REST OF UTAH AND SOUTHWEST WYOMING
A DRY COLD FRONT WILL MOVE
ACROSS MUCH OF THE STATE OVERNIGHT, ENTERING NORTHWESTERN UTAH
AROUND 00Z, REACHING THE WASATCH FRONT AROUND 06Z AND STALLING
AROUND CENTRAL UTAH BY FRIDAY MORNING. WINDS AHEAD OF THIS FRONT
WILL CONTINUE TO BE STRONG OUT OF THE SOUTHWEST EACH LATE-
MORNING/AFTERNOON, WITH LIGHTER, NORTHWESTERLY WINDS BEHIND THE
FRONT. VIS REDUCTIONS ARE POSSIBLE NEAR LOCAL WILDFIRES.
FIRE WEATHER
HOT, DRY, AND BREEZY CONDITIONS CONTINUE OVER UTAH
TODAY, RESULTING IN WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS
OVER MUCH OF THE AREA. A DRY COLD FRONT WILL MOVE THROUGH NORTHERN
UTAH TONIGHT INTO FRIDAY MORNING BEFORE STALLING. THIS WILL ALLOW
WINDS BEHIND THE FRONT TO WEAKEN, AND TEMPERATURES TO DROP TO UP
TO 10F BELOW SEASONAL NORMALS. AHEAD OF THE STALLED FRONT, GUSTY
WINDS WILL CONTINUE OVER A LARGE PORTION OF EASTERN UTAH, BRINGING
ANOTHER DAY OF CRITICAL FIRE WEATHER CONDITIONS. THE GUSTS ARE
EXPECTED TO CONTINUE INTO SATURDAY FOR AT LEAST SOUTHEAST UTAH AND
THE MOUNTAINS OF SOUTHERN UTAH, SO THE RED FLAG WARNING HAS BEEN
EXPANDED INTO SATURDAY FOR THAT AREA. DRY CONDITIONS WILL CONTINUE
FOR THE WEEKEND INTO EARLY NEXT WEEK WITH MUCH LIGHTER WINDS AND
STEADILY WARMING TEMPERATURES.
SLC WATCHES/WARNINGS/ADVISORIES
UT...RED FLAG WARNING UNTIL 9 PM MDT THIS EVENING FOR UTZ478-479-492-
495-497.
RED FLAG WARNING UNTIL 9 PM MDT FRIDAY FOR UTZ481>484-488-489-
494.
RED FLAG WARNING UNTIL 9 PM MDT SATURDAY FOR UTZ493-496-498.
WY...RED FLAG WARNING UNTIL 8 PM MDT FRIDAY FOR WYZ277.
SHORT TERM/FIRE WEATHER...TRAPHAGAN
LONG TERM...WILSON
AVIATION...CUNNINGHAM
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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