Area Forecast Discussion
Issued by NWS Salt Lake City, UT

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS65 KSLC 120915
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
315 AM MDT FRI SEP 12 2014

.SYNOPSIS...A COOL AIRMASS WILL REMAIN IN PLACE ACROSS NORTHERN
AND CENTRAL UTAH TODAY. HIGH PRESSURE WILL STRENGTHEN ACROSS THE
REGION THIS WEEKEND RESULTING IN A WARMING TREND. THIS HIGH WILL
REMAIN IN PLACE INTO THE MIDDLE OF NEXT WEEK.


&&

.SHORT TERM (THROUGH 06Z TUESDAY)...A SHORTWAVE TROUGH CURRENTLY
CROSSING THE NORTHERN PLAINS HAS LEFT A COOL SURFACE HIGH IN ITS
WAKE ACROSS THE HIGH PLAINS OF EASTERN WY. THIS HIGH IS INDUCING
AN EASTERLY GRADIENT ACROSS SOUTHWEST WY/NORTHERN UT...ALLOWING
FOR ENHANCED CANYON WINDS ALONG THE WASATCH FRONT AND CACHE
VALLEY. THUS FAR PEAK GUSTS HAVE REMAINED IN THE MID TO UPPER 30
MPH RANGE...AND EXPECT THIS TO REMAIN THE GENERAL RULE THROUGH MID
MORNING BEFORE WINDS DIMINISH AS THE GRADIENT RELAXES. WITH
COOLER AIR ALSO FILTERING INTO PORTIONS OF NORTHERN UT...HAVE
RETAINED A MENTION OF FROST IN THE CACHE VALLEY AND WASATCH
MOUNTAIN VALLEYS THIS MORNING.

MID LEVEL RIDGING IS FORECAST TO REBOUND ACROSS THE REGION DURING
THE UPCOMING WEEKEND RESULTING IN A QUICK WARMING TREND BY
SATURDAY. WITH THIS RIDGE REMAINING IN PLACE INTO EARLY NEXT WEEK
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY ABOVE NORMAL AREAWIDE.
THE MODELS DO SUGGEST A BIT OF MOISTURE WILL CREEP NORTHWARD INTO
THE AREA AS SUNDAY AFTERNOON. THIS WILL BRING A SLIGHT CHANCE OF
AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS ACROSS THE HIGHER
TERRAIN INTO EARLY NEXT WEEK.

&&

.LONG TERM (AFTER 06Z TUESDAY)...HIGH PRESSURE IS EXPECTED TO REMAIN
PARKED OVER THE AREA THROUGH TUESDAY...RESULTING IN GENERALLY DRY
AND MILD CONDITIONS. HOWEVER...ENOUGH MOISTURE WILL BE AROUND TO
CONTINUE TO PRODUCE A FEW SHOWERS OVER THE HIGHER TERRAIN.

GLOBAL MODELS INDICATE THE RIDGE SHIFTS EAST WEDNESDAY IN RESPONSE
TO A PACIFIC NORTHWEST STORM SYSTEM MOVING ONSHORE. THE RESULTANT
INCREASE IN SOUTHWESTERLY FLOW MAY ALLOW FOR SOME TROPICAL MOISTURE
TO MOVE BACK INTO THE CWA BY THURSDAY...THOUGH THIS IS MUCH MORE
DRAMATIC IN THE GFS COMPARED TO THE EC. THE MOISTURE WOULD REMAIN IN
PLACE THROUGH DAY 7. EC/GFS BOTH SHOW THE SYSTEM GRAZING NORTHERN
UTAH ON FRIDAY...WHICH WOULD PROVIDE MORE INSTABILITY FOR CONVECTIVE
DEVELOPMENT. WITH THIS IN MIND...HAVE RAISED POPS A BIT IN THE
EXTENDED PERIOD AND WILL NEED TO INCREASE FURTHER IF MODEL GUIDANCE
HOLDS ONTO THIS SOLUTION.

&&

.AVIATION...THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGHOUT THE
DAY WITH CLEAR SKIES. LIGHT AND VARIABLE WINDS SHOULD BECOME
PREVAILING SOUTHEASTERLY BETWEEN 12Z AND 14Z BEFORE SHIFTING TO THE
NORTHWEST BETWEEN 17Z AND 19Z.

&&

.FIRE WEATHER...A DRY NORTHWEST FLOW WILL REMAIN OVER THE FIRE
DISTRICT THROUGH THE FIRST PART OF THE WEEKEND. A COLD FRONT THAT
MOVED THROUGH THE STATE YESTERDAY WILL KEEP SOME LOCAL GUSTY CANYON
WINDS OVER PARTS OF THE WASATCH FRONT AND CACHE VALLEY EARLY THIS
MORNING. THESE WILL DIMINISH BY LATE MORNING. OTHERWISE...THE
AIRMASS OVER THE DISTRICT WILL BE DRY...STABLE...AND RELATIVELY COOL
TODAY. A MORE WEST TO SOUTHWEST FLOW WILL DEVELOP
SATURDAY...ALLOWING FOR WARMING TEMPERATURES. MOISTURE WILL START TO
MOVE BACK INTO THE AREA EARLY NEXT WEEK.

&&

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

$$

SEAMAN/TRAPHAGAN

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)


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.