Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 200403
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1003 PM MDT TUE MAY 19 2015

.SYNOPSIS...AN UPPER LEVEL TROUGH WILL CONTINUE TO ELONGATE AND
SHEAR APART OVER NORTHERN UTAH AND SOUTHWEST WYOMING TONIGHT. THE
NEXT STORM SYSTEM WILL ARRIVE LATE IN THE WEEK AND IMPACT MUCH OF
UTAH THROUGH THE HOLIDAY WEEKEND.


&&

.DISCUSSION...A MID LEVEL DEFORMATION AXIS EXTENDS ACROSS FAR
NORTHERN UT THIS EVENING...SITUATED BETWEEN AN ELONGATED UPPER LOW
ACROSS WY...AND A DEVELOPING UPPER TROUGH ALONG THE CA COAST. THIS
AXIS IS HELPING TO MAINTAIN SHOWERS ACROSS NORTHERN UT THIS
EVENING WITHIN A DEEPLY MOIST AIRMASS PER THE 00Z KSLC SOUNDING.
THESE SHOWERS WILL LIKELY CONTINUE INTO THE OVERNIGHT HOURS ACROSS
THE NORTH WHILE THE SOUTH REMAINS FAIRLY DRY.

THE UPPER FLOW IS FORECAST TO BACK LATE TONIGHT THROUGH
WEDNESDAY...AS THE UPSTREAM TROUGH DEEPENS ALONG THE COAST. THE
COMBINATION OF LINGERING MOISTURE AND AN EJECTING WAVE LIFTING
THROUGH THE GREAT BASIN WITHIN THIS BACKING FLOW WILL MAINTAIN A
THREAT FOR CONVECTION DURING THE LATE AFTERNOON AND EVENING HOURS
ACROSS THE NORTH.

AN INCREASE IN WIDESPREAD PRECIPITATION IS STILL EXPECTED LATE IN
THE WEEK AND INTO THE UPCOMING WEEKEND AS THE UPSTREAM TROUGH
SPREADS INLAND AND SLOWLY WORKS ITS WAY EASTWARD ACROSS THE
REGION.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED THROUGH THE PERIOD AT THE
SLC TERMINAL. CIGS ABOVE 6000 FT AGL SHOULD PREVAIL...BUT PASSING
SHOWERS MAY BRIEFLY DROP CIGS BELOW THAT VALUE OVERNIGHT. WINDS
WILL REMAIN SOUTHEASTERLY THROUGH THE OVERNIGHT HOURS WITH A 20
PERCENT CHANCE OF GUSTY AND/OR ERRATIC WINDS WITH PASSING SHOWERS.

&&

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

$$

PUBLIC...
AVIATION...

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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