Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 062132
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
332 PM MDT SUN JUL 6 2014

.SYNOPSIS...HIGH PRESSURE ALOFT WILL REMAIN LOCKED IN ACROSS THE
INTERIOR WEST THIS WEEK. MOISTURE ACROSS SOUTHERN UTAH AND ARIZONA
WILL RETURN NORTH ACROSS THE ENTIRE FORECAST AREA DURING THE
MIDDLE AND LATTER PORTIONS OF THE UPCOMING WORK WEEK.



&&

.DISCUSSION...HIGH PRESSURE REMAINS PARKED OVER THE FORECAST AREA
THIS AFTERNOON. STRONG MOISTURE GRADIENT CONTINUES TO EXIST
BETWEEN SOUTHERN UTAH...WHERE PWS ARE IN EXCESS OF 1.0 INCH IN
MANY LOCATIONS...AND OVER NORTHERN UTAH...WHERE PWS ARE MORE IN
THE 0.5 TO 0.6 INCH RANGE. SOME SHOWERS AND THUNDERSTORMS HAVE
DEVELOPED OVER THE HIGHER TERRAIN...PRIMARILY OVER SOUTHERN UTAH
WHERE THE GREATEST MOISTURE IS. STORMS ARE MOVING LITTLE BUT
APPEAR TO HAVE A BIT MORE OF A DRIFT THAN STORMS THAT DEVELOPED
YESTERDAY. POTENTIAL FOR CONVECTION CONTINUES INTO THE EARLY
EVENING BEFORE THE LOSS OF DAYTIME HEATING. TEMPERATURES OVER THE
FORECAST AREA REMAIN SIMILAR TO YESTERDAY...5-10F ABOVE SEASONAL
NORMS OVER NORTHERN UTAH AND CLOSER TO CLIMO OVER SOUTHERN UTAH.

THE RIDGE IS PROGGED TO FLATTEN AND THEN HAVE THE AXIS REDEVELOP
OVER THE CALIFORNIA COAST TOMORROW AS A PACIFIC NORTHWEST TROUGH
MOVES WELL NORTH OF THE AREA. THIS WILL ACT TO DRY OUT THE NORTH A
BIT MORE AND MOVE THE DEEP MOISTURE FARTHER SOUTH. HOWEVER...BY
TUESDAY THE AXIS SHOULD BE BACK OVER UTAH...ALLOWING MOISTURE TO
MOVE BACK NORTHWARD. THE MOISTURE WILL MOVE ACROSS ALL OF THE
FORECAST AREA WEDNESDAY AND THURSDAY WITH ALMOST ALL LOCATIONS
SEEING PWS OF 1.0 INCH OR GREATER BY THURSDAY AFTERNOON.
SHORTWAVES MOVING THROUGH THE RIDGE ARE EXPECTED TO ADD TO THE
INSTABILITY...SO THE MIDDLE TO LATTER PART OF THE WORK WEEK MIGHT
BE QUITE ACTIVE AS FAR AS CONVECTION GOES.

BY FRIDAY...GFS AND EC INDICATE THE RIDGE AXIS BECOMING MORE NW TO
SE ORIENTED OVER THE STATE AS ANOTHER TROUGH MOVES ACROSS
CANADA.THIS COULD CAUSE SOME DRYING OF THE AIRMASS OVER CENTRAL
AND SOUTHERN UTAH FOR FRIDAY INTO THE UPCOMING WEEKEND AS DEEP
MOISTURE REMAINS OVER NORTHERN UTAH. THIS SHIFT MAY ALSO CAUSE
SOME SLIGHT COOLING OF THE AIRMASS OVER NORTHERN UTAH...BRINGING
TEMPERATURES CLOSER TO SEASONAL NORMALS.

&&

.AVIATION...OPERATIONAL WEATHER CONCERNS WILL REMAIN MINIMAL AT THE
KSLC TERMINAL THROUGH THE VALID TAF PERIOD. NORTHWEST WINDS WILL
REMAIN IN PLACE THROUGH 03-04Z BEFORE RETURNING TO THE SOUTHEAST.
VFR CONDITIONS WILL BE MAINTAINED UNDER GENERALLY CLEAR SKIES.

&&

.FIRE WEATHER...A RIDGE OF HIGH PRESSURE WILL SEPARATE THE MONSOONAL
MOISTURE ACROSS THE SOUTH AND A DRIER MORE STABLE AIRMASS TO THE
NORTH INTO THE MIDDLE OF THE WEEK. TEMPERATURES WILL BE UNIFORM
ACROSS THE STATE OR BECOME WARMER ACROSS THE NORTH THAN THE SOUTH.
NO SIGNIFICANT AREAS OF LOW RH AND GUSTY WINDS ARE EXPECTED THROUGH
AT LEAST MID WEEK.

DEEP LAYER MOISTURE HAS ADVANCED NORTH TO ABOUT INTERSTATE 70.
EXPECT MOST ACTIVE CONVECTION SOUTH OF INTERSTATE 70 FOR THE REST OF
TODAY...WITH THE SPINE OF THE CENTRAL AND NORTHEAST UTAH MOUNTAINS
SEEING MORE ISOLATED ACTIVITY THROUGH EARLY THIS EVENING. RH VALUES
WILL RESPOND BY INCREASING ACROSS THE SOUTH ALONG WITH MORE
EXPANSIVE CLOUD COVER...WHERE LOCALLY HEAVY RAINFALL WILL ALSO BE
POSSIBLE. ISOLATED TO REMOTE DRY CONVECTION POSSIBLE ACROSS THE
NORTHEAST VALLEYS. THE RIDGE POSITION LOOKS TO REMAIN FAIRLY STEADY
INTO EARLY NEXT WEEK...MAINTAINING SIMILAR WEATHER THROUGH ABOUT
TUESDAY OR WEDNESDAY.

THE RIDGE LOOKS TO REFORM NEAR THE FOUR CORNERS DURING THE SECOND
HALF OF THE WEEK. THIS SHOULD ALLOW AN INFLUX OF DEEPER MOISTURE
NORTHWARD. ACROSS THE NORTH...TEMPERATURES WILL COOL WITH RISING
HUMIDITY. CLOUD COVER SHOULD BECOME MORE EXPANSIVE WITH A GREATER
CHANCE FOR A WETTING RAIN/LOCALLY HEAVY RAINFALL ACROSS THE NORTH
DURING THE SECOND HALF OF THE WEEK. MEANWHILE...A DRYING TREND MAY
TAKE PLACE ACROSS SOUTHERN UTAH BEGINNING THURSDAY.

&&

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

$$

PUBLIC...TRAPHAGAN
FIRE WEATHER...ROGOWSKI
AVIATION...MERRILL

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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