002
FNUS75 KSLC 181200
FWSSLC
SPOT FORECAST FOR TRIAL LAKE DAM SAFETY INCIDENT 25...USBR
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
600 AM MDT FRI JUL 18 2025
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON JULY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DEEP MONSOON MOISTURE IS SPREADING NORTHWARD ACROSS
UTAH THIS MORNING. IN THE UNSTABLE AND VERY MOIST AIRMASS, FAIRLY
WIDESPREAD SHOWERS AND THUNDERSTORMS WILL DEVELOP IN THE VICINITY
OF THE DAM DURING THE AFTERNOON, WITH SOME PERSISTING INTO THE
EVENING AND OVERNIGHT HOURS. ANY STORMS THAT DEVELOP WILL BE
CAPABLE OF PRODUCING HEAVY RAIN IF THEY MOVE OVER THE DAM.
HOWEVER, MOST LIKELY ACCUMULATIONS WILL BE LESS THAN A QUARTER
INCH. THE AIRMASS WILL GRADUALLY DRY OVER THE WEEKEND, RESULTING
IN DIMINISHING COVERAGE OF SHOWERS AND THUNDERSTORMS THROUGH EARLY
NEXT WEEK.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT CLOUD COVER).
ISOLATED SHOWERS AND THUNDERSTORMS LATE IN THE
MORNING. NUMEROUS RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE AFTERNOON.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF LIGHTNING.50 PERCENT.
MAX TEMPERATURE.....66-70.
MIN HUMIDITY........44-48 PERCENT.
SURFACE WINDS (MPH).SOUTH WINDS 5-10 MPH.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER).
SCATTERED SHOWERS AND THUNDERSTORMS IN THE
EVENING, THEN ISOLATED RAIN SHOWERS OVERNIGHT.
CHANCE OF PCPN......40 PERCENT.
CHANCE OF LIGHTNING.32 PERCENT.
MIN TEMPERATURE.....46-50.
MAX HUMIDITY........76-80 PERCENT.
SURFACE WINDS (MPH).DOWNSLOPE/DOWNVALLEY WINDS 3-7 MPH.
SATURDAY
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER).
ISOLATED SHOWERS AND THUNDERSTORMS LATE IN THE
MORNING. SCATTERED SHOWERS AND THUNDERSTORMS IN
THE AFTERNOON.
CHANCE OF PCPN......50 PERCENT.
CHANCE OF LIGHTNING.43 PERCENT.
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........34-38 PERCENT.
SURFACE WINDS (MPH).SOUTHWEST WINDS 5-10 MPH.
FORECASTER...TRAPHAGAN
REQUESTED BY...JEFF BEATY
TYPE OF REQUEST...OTHER
.TAG 2518128.2/SLC
.DELDT 07/18/25
.FORMATTERVERSION 2.0.0
.EMAIL JBEATY@USBR.GOV
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