631
FXUS65 KSLC 091056
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
356 AM MST TUE FEB 9 2010
SYNOPSIS
HIGH PRESSURE ALOFT OVER THE INTERIOR WEST WILL WEAKEN
TODAY AHEAD OF A LOW PRESSURE SYSTEM MOVING SOUTHEAST ALONG THE
CALIFORNIA COAST. THIS LOW WILL TURN EAST THROUGH SOUTHERN ARIZONA
WEDNESDAY...WITH MINIMAL IMPACT TO SOUTHERN UTAH. HIGH PRESSURE
ALOFT WILL RETURN FOR LATE IN THE WEEK.
DISCUSSION
A WELL-DEFINED UPPER LOW ALONG THE CNTRL CA COAST EARLY
THIS MORNING WILL CONTINUE SE ALONG THE COAST THROUGH THIS EVENING.
SATELLITE IMAGERY SHOWING A FAIRLY RAPID INCREASE IN CLOUD COVER
ACROSS SRN NV/NW AZ IN THE AREA OF UPPER DIVERGENCE IN THE EAST
FLANK OF THE UPPER LOW. THE CENTER OF THE UPPER LOW WILL REMAIN
FAR REMOVED FROM EVEN SRN UTAH AS THE CENTER EVENTUALLY TRACKS
EAST THROUGH SRN AZ WEDNESDAY. WEAK LIFT WILL ALLOW FOR SOME LIGHT
PRECIP WILL STRETCH INTO SW UTAH LATER TODAY. A BETTER THREAT FOR
PRECIP ACROSS SRN/CNTRL UTAH WILL DEVELOP TONIGHT ALONG THE
DEFORMATION AXIS OVER SRN UTAH.
A SOLID UPPER RIDGE WILL BECOME ESTABLISHED ACROSS THE GREAT BASIN
ONCE AGAIN THURSDAY/FRIDAY. SHORTWAVES RACING ACROSS THE TOP OF
THE RIDGE ACROSS THE PACIFIC NW/NRN ROCKIES COULD STRETCH SOUTH
INTO FAR NRN UTAH FRIDAY AND AGAIN ON SATURDAY. NONE OF THESE
FEATURES LOOK ALL THAT IMPRESSIVE AS THEY BRING IN PLENTY OF
MOISTURE BUT VERY LITTLE IN THE WAY OF DYNAMIC LIFT OR THERMAL
SUPPORT FOR LIFT. WILL KEEP POPS/QPFS LOW IN THE MORNING FORECAST
PACKAGE.
THE MEAN RIDGE POSITION ACROSS THE WRN STATES LOOKS TO HOLD FIRM
HEADING INTO NEXT WEEK. AS SUCH WILL KEEP CONDITIONS ON THE DRY
SIDE WITH TEMPS CLIMBING TO ABOVE NORMAL OVER THE MUCH OF THE
FORECAST AREA IN THE EXTENDED PERIOD.
AVIATION
OPERATIONAL WEATHER CONCERNS WILL REMAIN MINIMAL AT KSLC
THROUGH TODAY. NORMAL DIURNAL WINDS ARE EXPECTED...WITH A SWITCH
FROM SOUTHEAST TO NORTHWEST BETWEEN 18-20Z. ALTHOUGH SOME LOW CLOUDS
WILL HANG OVER THE MOUNTAINS THIS AFTERNOON...BROKEN CIGS OF 7000
AGL OR LESS ARE EXPECTED TO HOLD OFF UNTIL LATE TONIGHT. ONLY A 20
PERCENT CHANCE EXISTS THEY WILL LOWER BELOW 7000FT AGL PRIOR TO 06Z.
SLC WATCHES/WARNINGS/ADVISORIES
UT...NONE.
WY...NONE.
PUBLIC...CONGER
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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