Weather Service Report


719 
FXUS65 KGJT 061824
AFDGJT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1124 AM MST SAT FEB 6 2016

.UPDATE...
ISSUED AT 1120 AM MST SAT FEB 6 2016

THE PATCHY DENSE FOG ACROSS WEST CENTRAL COLORADO CONTINUES TO
LIFT AND DISSIPATE. AS A RESULT...LET THE DENSE FOG ADVISORY
EXPIRE AT 11 AM. STILL PICKING UP A GOOD BIT OF STRATUS ON
SATELLITE ACROSS EAST CENTRAL UTAH DOWN INTO CANYONLANDS. WEB CAMS
AND SFC OBS SHOW SOME BREAKS IN THE OVERCAST AND EXPECT THIS DECK
TO SLOWLY DIMINISH THROUGH THIS AFTERNOON AND SOME EROSION IS
EVIDENT ALONG THE EDGES IN SATELLITE IMAGERY.

UPDATE ISSUED AT 939 AM MST SAT FEB 6 2016

TEMPS ARE 10 TO 15 DEGREES COOLER AT THIS HOUR COMPARED TO 24 HRS
AGO FOR THE GRAND VALLEY...NORTHWEST PLATEAU AND GUNNISON VALLEY.
THE INVERSION STILL LOOKS STRONG TODAY SO DROPPED MAX TEMPS A FEW
DEGREES FOR TODAY. AREAS OF DENSE FOG SHOULD BE LIFTING BY 11 AM.
MODERATE MOISTURE IN NORTHWEST FLOW WILL IMPINGE ON THE NORTHERN
MTNS TODAY AND MAY RESULT IN LIGHT SNOW SHOWERS. 

UPDATE ISSUED AT 727 AM MST SAT FEB 6 2016

REPORTS OF LOCALLY DENSE FOG ROLLING INTO THE OFFICE THIS MORNING
ACROSS PORTIONS OF MESA COUNTY. THE FOG WILL BURN OFF BY MID
MORNING...BUT HAVE WENT AHEAD AND ISSUED A DENSE FOG ADVISORY AS
VISIBILITY DROP BELOW 1/4 MILE AT TIMES. THE LOWEST VISIBILITIES
WILL BE ALONG THE COLORADO AND GUNNISON RIVERS AND NEAR I-70 IN
THE VICINITY OF FRUITA. OTHER VALLEYS SEEING PATCHY FOG AS  
WELL...BUT VISIBILITIES AND WEB CAMS INDICATE VISIBILITIES GREATER
THAN ONE MILE.

&&

.SHORT TERM...(TODAY THROUGH SUNDAY)
ISSUED AT 354 AM MST SAT FEB 6 2016

A STRONG RIDGE WILL CONTINUE BUILDING OVER THE WESTERN U.S...WITH
ITS AXIS OVER THE WESTERN GREAT BASIN. A HUGE LONGWAVE TROUGH
WAS BUILDING OVER THE EASTERN HALF OF THE U.S. WITH THE FORECAST
AREA UNDER THE NORTHWEST FLOW BETWEEN THE TWO. A VERY WEAK
SHORTWAVE TROUGH WILL RIDE DOWN THE WESTERN PERIPHERY OF THE RIDGE
AND OVER THE MOUNTAINS NEAR THE CONTINENTAL DIVIDE SO THERE SHOULD
BE ISOLATED OROGRAPHIC CLOUDS AND SHOWERS HUGGING THE NORTHWEST
FACING SLOPE TODAY AND TONIGHT. THESE LESSEN SUNDAY AS THE
AVAILABLE MOISTURE ERODES.

THE ONLY OVER WEATHER OF NOTE IS THE LOW STRATUS AND FOG OVER THE
GRAND FLAT IN EASTERN UT AND THE EXTREME WESTERN PORTION OF THE
GRAND VALLEY. LOW LEVEL INVERSIONS WILL KEEP THE MOISTURE...
STRATUS...AND AREAS OF FOG IN PLACE THROUGH MIDMORNING. IT SHOULD
RETURN TONIGHT AS WELL. TEMPS WILL REMAIN ON THE COOL SIDE WITH
VERY COLD LOW TEMPS IN THE HIGH VALLEYS.

.LONG TERM...(SUNDAY NIGHT THROUGH FRIDAY)
ISSUED AT 354 AM MST SAT FEB 6 2016

THE STEEP RIDGE OF HIGH PRESSURE MENTIONED IN THE PREVIOUS SHORT
TERM DISCUSSION WILL HOLD SWAY OVER THE REGION THROUGH THE MIDDLE
OF THE COMING WEEK ACCORDING TO MEDIUM RANGE MODELS. AS A RESULT
...EXPECT DRY AND MILDER CONDITIONS FOR MOST AREAS EXCEPT INVERTED
VALLEYS WHICH WILL BE SLOWER TO RESPOND TO WARMING TREND. THE
RIDGE WEAKENS DURING THE LATTER PART OF THE WEEK AS A A PAIR OF
PACIFIC SHORTWAVE TROUGHS MOVE THROUGH THE PACIFIC NORTHWEST.
HOWEVER...THE RIDGE RETAINS ENOUGH AMPLITUDE TO KEEP DEEP
MOISTURE NORTH OF THE AREA THOUGH MODERATE MID-LEVEL MOISTURE WILL
BRING CLOUDS TO THE NORTHERN ZONES. DOESN/T APPEAR THERE WILL BE
ANY RELIEF FROM VALLEY INVERSIONS SO UNDERCUT GUIDANCE FOR BOTH
HIGHS AND LOWS IN THE LOWER ELEVATIONS.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON)
ISSUED AT 1028 AM MST SAT FEB 6 2016

PATCHY LOW CLOUDS AND FOG WILL PERSIST OVER THE VALLEYS OF EAST
CENTRAL UTAH AND EXTREME WEST CENTRAL COLORADO THROUGH 20Z THIS
AFTERNOON. THE STRATUS DECK IS EXPECTED TO DIMINISH AFTER 20Z WITH
CLEAR CONDITIONS MOVING IN THROUGH THIS EVENING. PATCHY FOG AND
LOW CLOUDS REDEVELOP OFTER 04Z THIS EVENING AND PERSIST THROUGH
MIDDAY SUNDAY. KEGE...KASE...KVEL AND KCNY WILL ALL SEE SOME FOG
MOVE INTO THE VCNTY OF THE AIRPORTS LATE TONIGHT AND EARLY SUNDAY
MORNING. NEAR THE STRATUS...EXPECT MVFR AND IFR CONDS. 


&&

.GJT WATCHES/WARNINGS/ADVISORIES...
CO...NONE.
UT...NONE.
&&

$$

UPDATE...JDC
SHORT TERM...CC
LONG TERM...NL
AVIATION...JDC

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