Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 262117
AFDBOU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
217 PM MST THU FEB 26 2015

.SHORT TERM...(THIS EVENING THROUGH FRIDAY)
ISSUED AT 136 PM MST THU FEB 26 2015

RADAR ECHOES STARTING TO FILL IN AROUND DENVER AS THE NEXT SYSTEM
APPROACHES THE REGION FROM THE NORTHWEST. WEAK UPSLOPE COUPLED
WITH WEAK MID TO UPPER LEVEL QG ASCENT WILL BE IN PLAY THROUGH
THIS EVENING. ADDITIONAL ACCUMULATIONS OF AN INCH OR LESS THROUGH
THE REST OF THE AFTERNOON...WITH ANOTHER 1 TO 3 INCHES THIS
EVENING. BEST ACCUMULATIONS WILL BE IN AND NEAR THE FOOTHILLS AND
PALMER DIVIDE. IN THE HIGH COUNTRY...RIDGETOP WINDS WILL BE MORE
WESTERLY OVERNIGHT. THE MOUNTAINS COULD PICK UP ANOTHER 2 TO 5
INCHES OVERNIGHT. BEST MID LEVEL INSTABILITY TONIGHT WILL BE WEST
OF THE DIVIDE WITH H7/H5 LAPSE RATE 7.5-8C/KM EARLY...SO SNOW
THERE WILL BE MORE CONVECTIVE. EAST OF THE DIVIDE...MORE OF AN
OVERRUNNING SITUATION. WINDS AND SNOW ACCUMULATIONS SHOULD BE
UNDER ADVISORY CRITERIA TONIGHT SO NO HIGHLIGHTS PLANNED AT THIS
TIME. ON FRIDAY...THE SYSTEM SHIFTS TO THE SOUTH AND EAST WITH
DECREASING SNOW COVERAGE THROUGH THE DAY. ACROSS THE NORTHEAST
PLAINS...A FAIRLY DECENT SE TO NW SFC PRESSURE GRADIENT SETS UP
ESPECIALLY TO THE EAST AND SOUTHEAST OF DENVER. AS A
RESULT...THERE COULD BE SOME AREAS OF BLOWING SNOW IN THE
AFTERNOON WITH GUSTS OF 25-35 MPH POSSIBLE. TEMPERATURES WILL
REMAIN COLD WITH WIND CHILL TEMPERATURES FROM 5 TO 10 BELOW ZERO
IN THE WINDIER AREAS...PRIMARILY THE I70 CORRIDOR EAST OF DENVER
TO THE STATELINE.

.LONG TERM...(FRIDAY NIGHT THROUGH THURSDAY)
ISSUED AT 136 PM MST THU FEB 26 2015

ON FRIDAY NIGHT...THE JET STREAM WILL BE OVER THE DESERT SOUTHWEST
AND SOUTHERN ROCKIES. THIS IS EXPECTED TO KEEP MOST OF THE SNOW TO
OUR SOUTH...OVER SOUTHERN COLORADO AND NEW MEXICO. AS THE JET STREAM
SHIFTS NORTH LATE FRIDAY NIGHT AND SATURDAY SNOW IS EXPECTED TO MOVE
INTO THE MOUNTAINS OF NORTH CENTRAL COLORADO. WILL KEEP LOW POPS IN
THE FORECAST...MAINLY FOR THE MOUNTAINS FRIDAY NIGHT AND EARLY
SATURDAY. WILL THEN INCREASE POPS AS THE JET MOVES OVER THE AREA
SATURDAY AFTERNOON AND NIGHT. IN ADDITION TO THE JET...LOW LEVEL
WINDS WILL TURN NORTH TO NORTHEAST SATURDAY AND SATURDAY EVENING AND
PRODUCE WEAK UPSLOPE LIFT. NOT A STRONG PUSH LIKE THE PREVIOUS
SYSTEMS...SO JUST EXPECT LIGHT TO OCCASIONAL MODERATE SNOW. BEST
ACCUMULATION SHOULD BE OVER THE MOUNTAINS.

FOR SUNDAY AND MONDAY...SOUTHWEST FLOW WILL PREVAIL AS A BROAD UPPER
LEVEL TROUGH REMAINS OVER THE SOUTHWEST PART OF THE COUNTRY. BEST
CHANCE FOR SNOW UNDER THIS PATTERN WILL BE OVER THE MOUNTAINS. WILL
KEEP LOW POPS IN THE FORECAST FOR THE AREA...MAINLY FOR THE CHANCE
OF LIGHT SNOW.

THERE WILL BE A BETTER CHANCE FOR SNOW TUESDAY AND WEDNESDAY AS
ANOTHER SYSTEM DROPS SOUTHEAST ACROSS THE AREA. IF THIS PANS OUT...
THIS WILL PUSH A COLD FRONT THROUGH THE AREA AND BRING A PERIOD OF
SNOW. TIMING IS STILL UNCERTAIN THIS FAR OUT...BUT STILL LOOKING
LIKE A PERIOD OF SNOW FOR MUCH OF THE AREA.

ON THURSDAY...UPPER LEVEL RIDGE WILL BUILD OVER THE GREAT BASIN AND
PRODUCE A NORTHWEST FLOW OVER COLORADO. IT WILL BE DRY...BUT STILL
COOL UNDER THIS PATTERN.&&

.AVIATION...(FOR THE TAFS THROUGH 00Z FRIDAY LATE AFTERNOON)
ISSUED AT 136 PM MST THU FEB 26 2015

PREVAILING MVFR/IFR CIG/VSBY RESTRICTIONS  THROUGH 06Z
TONIGHT...LINGERING A BIT LONGER AT KBJC AND KAPA. CONDITIONS
DETERIORATING ALREADY THIS AFTERNOON WITH PREVAILING VSBYS LESS
OF A MILE LIKELY AFTER 00Z THIS EVENING. SNOW COVERAGE WILL
DECREASE OVERNIGHT. SFC WINDS PRIMARILY E/SELY. SOME STRONGER
GUSTS POSSIBLE AT KDEN FRIDAY AFTN...SO AREAS OF BLSN MAY ALSO BE
AN ISSUE AFTER 18Z IF SOME STRONGER GUSTS 20-25 KTS DVLP.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM...COOPER
LONG TERM...MEIER
AVIATION...COOPER


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