Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 220209
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
809 PM MDT SUN SEP 21 2014

.SYNOPSIS...AN UPPER LOW WILL LIFT NORTHEAST ACROSS THE GREAT
BASIN TONIGHT THEN MOVE OFF TO THE NORTHEAST MONDAY. HIGH
PRESSURE WILL FOLLOW FOR MID WEEK...BEFORE ANOTHER STORM SYSTEM
MOVES INTO THE REGION NEXT WEEKEND.

&&

.DISCUSSION...AN UPPER LOW SPINNING ACROSS NORTHERN NV WILL
GRADUALLY WORK ITS WAY NORTHEASTWARD OVERNIGHT. AMPLE LOW LEVEL
MOISTURE REMAINS IN PLACE ACROSS THE FORECAST AREA...HOWEVER MUCH
DRIER AIR HAS ROTATED INTO SOUTHERN UT...WHERE SHOWER AND
THUNDERSTORM ACTIVITY HAS BEEN ON THE DOWNWARD TREND OVER THE LAST
FEW HOURS. MEANWHILE...AN AREA OF SHOWERS AND THUNDERSTORMS
ASSOCIATED WITH THE UPPER LOW CENTER IS CURRENTLY
DEVELOPING/SPREADING OUT OF NORTHEAST NV INTO TOOELE COUNTY. THIS
ACTIVITY IS EXPECTED TO SLOWLY SPREAD EAST OVER THE NEXT FEW
HOURS WITHIN A REGION OF UPPER LEVEL DIFFLUENCE...AND IF IT HOLDS
TOGETHER SHOULD REACH THE WASATCH FRONT LATE IN THE EVENING...AND
LINGERING INTO THE OVERNIGHT HOURS. PRECIPITATION MAY LINGER INTO
THE MORNING HOURS MAINLY ACROSS THE HIGHER TERRAIN BEFORE ENDING
DURING THE DAY MONDAY. UPDATED EARLIER TO PUSH BACK TIMING A BIT
ACROSS THE NORTH WHILE CUTTING BACK ON POPS ACROSS THE SOUTH.

&&

.AVIATION...SHOWERS DEVELOPING TO THE WEST OF THE KSLC TERMINAL
ARE EXPECTED TO REACH THE TERMINAL AROUND 05Z...AND CONTINUE INTO
THE OVERNIGHT HOURS. THERE IS A 30 PERCENT CHANCE OF A
THUNDERSTORM AT THE TERMINAL DURING THIS TIMEFRAME...ALONG WITH A
40 PERCENT CHANCE OF MVFR CIGS/VIS WITHIN HEAVIER SHOWERS. WINDS
ARE EXPECTED TO REMAIN PRIMARILY SOUTHEASTERLY...BUT MAY BECOME
ERRATIC AT TIMES WITH PASSING SHOWERS. CONDITIONS ARE EXPECTED TO
IMPROVE BY 15Z MONDAY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

$$

SEAMAN

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)


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