Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 230309
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
909 PM MDT WED JUL 22 2015

.SYNOPSIS...SOUTHWESTERLY FLOW ALOFT WILL PREVAIL ACROSS THE
REGION THROUGH THE REMAINDER OF THE WEEK. MOISTURE WILL REMAIN
CONFINED TO FAR NORTHERN AND NORTHWESTERN UTAH WHILE THE
REMAINDER OF THE REGION REMAINS DRY THROUGH THE UPCOMING WEEKEND.

&&

.DISCUSSION...DEEP LAYER SOUTHWESTERLY FLOW PREVAILS ACROSS THE
FORECAST AREA THIS EVENING...DOWNSTREAM FROM A MID LEVEL TROUGH
SITUATED ALONG THE WEST COAST. THIS SOUTHWESTERLY FLOW HAS
ADVECTED A MUCH DRIER AIRMASS INTO SOUTHERN AND CENTRAL UT...WHILE
DISPLACING A LINGERING MOISTURE AXIS NORTHWARD INTO NORTHERN UT.
HAVE SEEN A COUPLE OF ROUNDS OF CONVECTION ACROSS THE NORTH THIS
AFTERNOON AND EVENING...AND DESPITE AN INFUSION OF DRIER AIR FROM
THE SOUTH AND LOSS OF DAYTIME HEATING...WILL LIKELY CONTINUE TO
SEE ISOLATED TO PERHAPS SCATTERED COVERAGE INTO THE OVERNIGHT
HOURS GENERALLY ALONG AND NORTH OF I-80...WITH THE GREATEST THREAT
ACROSS BOX ELDER AND TOOELE COUNTIES.

LITTLE CHANGE IN THE OVERALL PATTERN IS EXPECTED OVER THE NEXT
COUPLE OF DAYS...AS A GENERALLY DRY SOUTHWESTERLY FLOW WILL
PREVAIL ACROSS THE FORECAST AREA. LINGERING MOISTURE AND AN
ATTENDANT THREAT FOR PRECIPITATION WILL REMAIN CONFINED TO FAR
NORTHERN AND NORTHWESTERN UT DURING THIS TIME.

WILL UPDATE TO MAINTAIN SCATTERED POPS ACROSS ZONE 5 WHILE
BACKING OFF TO ISOLATED COVERAGE ACROSS THE REMAINDER OF THE
NORTHERN VALLEYS OVERNIGHT...WHILE MAINTAINING A DRY FORECAST
ACROSS THE SOUTH.

&&

.AVIATION...NORTHERLY FLOW IS EXPECTED TO SWITCH BACK TO THE SOUTH
AT KSLC BY 04Z. THERE IS A 20 PERCENT CHANCE OF A THUNDERSTORM
CROSSING THE AIRFIELD THROUGH 05Z...DROPPING TO A 10 PERCENT
CHANCE THEREAFTER...WITH AN ATTENDANT THREAT FOR GUSTY ERRATIC
WINDS AND LIGHTNING.

&&

.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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