FXUS65 KSLC 150346
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
846 PM MST MON DEC 14 2009
.SYNOPSIS...HIGH PRESSURE WILL DEVELOP OVER THE AREA TONIGHT AND
PERSIST THROUGH THE WEEKEND. MOISTURE IN A MILD WESTERLY FLOW
WILL GRAZE NORTHERN UTAH LATER TUESDAY THROUGH THURSDAY.
&&
.DISCUSSION...STORM SYSTEM OFF THE PACIFIC NORTHWEST COAST
CONTINUES TO PUSH NORTHWARD WHICH IN TURN IS BUILDING THE RIDGE
OVER THE INTERMOUNTAIN REGION TONIGHT. THE HIGH CLOUDS THAT WERE
MOVING IN ACROSS NORTHERN CALIFORNIA EARLIER ARE DISSIPATING AS
THEY MOVE INTO THE STRENGTHENING RIDGE. THE LATEST NAM MODEL PICKS
UP ON THIS AND IS SLOWING THE PROGRESSION OF CLOUDS INTO UTAH
UNTIL VERY LATE TONIGHT AND TUESDAY. HAVE BACKED OFF THE TIMING OF
CLOUDS MOVING INTO UTAH FOR TONIGHT...BUT THE MIDNIGHT CREW MAY
HAVE TO BACK OFF THE ONSET TIL LATER TUESDAY OR EVEN TUESDAY
NIGHT.
WITH THESE CLEAR SKIES THIS EVENING...TEMPERATURES HAVE FALLEN
RAPIDLY WITH SEVERAL LOCATIONS THAT HAVE A DEEP SNOW COVER WELL
BELOW FORECASTED LOWS ALREADY. WENDOVER FOR ONE IS ALREADY DOWN TO
12 DEGREES. SOME OTHER SPOTS IN NORTHERN AREAS ARE CLOSING IN ON
THEIR FORECAST LOWS SO HAVE UPDATED TO LOWER MINIMUM TEMPERATURES
IN THOSE SPOTS.
WITH THE CLEAR SKIES LASTING WELL PAST MIDNIGHT ACROSS THE CACHE VALLEY
THE PROSPECT OF FOG IS LIKELY SO HAVE UPDATED TO INCLUDE AT LEAST
PATCHY FOG THERE. OVER IN THE EASTERN VALLEYS WHERE SNOW COVER IS
EXTENSIVE FOG IS ALREADY FORMING. THIS WAS FORECASTED WELL SO NO
UPDATES NEEDED.
REMOVED ANY MENTION OF SNOW FLURRIES IN THE NORTHERN MOUNTAINS AS
THE SUPPORT ALOFT VANISHED QUICKLY AFTER SUNSET. REST OF PACKAGE
IN GOOD SHAPE.
&&
.AVIATION...VFR CONDITIONS WILL CONTINUE THROUGH THE FORECAST PERIOD
AT THE SLC TERMINAL WITH HIGH THIN CLOUDS. SOUTHEAST WINDS ARE
EXPECTED TO CONTINUE THROUGH TOMORROW AFTERNOON.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&
$$
PUBLIC...STRUTHWOLF
AVIATION...YOUNG
FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
