Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 271410 CCA
AFDBOU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
332 AM MST SAT DEC 27 2014

.SHORT TERM...(THIS AFTERNOON THROUGH SATURDAY)
ISSUED AT 332 AM MST SAT DEC 27 2014

FOR TODAY...THE UPPER TROUGH WILL SHIFT TO THE EAST WITH A DRIER
NORTHWESTERLY FLOW ALOFT DEVELOPING OVER THE REGION. CROSS-
SECTIONS INDICATE ENOUGH MOISTURE IN THE MOUNTAINS FOR A FEW
LINGERING SHOWERS IN THE MORNING. IT WILL NOT BE AS COLD BUT STILL
WELL BELOW NORMAL. THE FLOW ALOFT WILL INCREASE TONIGHT AND
TRANSITION TO MORE WESTERLY DIRECTION LATE. SPATIAL CROSS-SECTIONS
INDICATE A WEAK MOUNTAIN WAVE DEVELOPING WHICH WL PRODUCE WINDY
CONDITIONS IN AND NEAR THE FRONT RANGE FOOTHILLS. NOTHING NEAR
WARNING CRITERIA...BUT COULD SEE TEMPERATURES MODIFY SIGNIFICANTLY
IN SOME OF THE MORE WIND PRONE LOCATIONS. MOISTURE WILL BE
INCREASING AS WELL...SO WL KEEP CHC POPS PRIMARILY FOR ZONE 31
LATE TONIGHT.

.LONG TERM...(SATURDAY NIGHT THROUGH THURSDAY)
ISSUED AT 332 AM MST SAT DEC 27 2014

FOR SUNDAY STRONG NW FLOW DOMINATES AS THE TROUGH CONTINUES TO MOVE
SE. SURFACE HIGH PRESSURE MOVES INTO WESTERN COLORADO WITH LEE
TROUGHING OVER THE PLAINS. TEMPERATURES WILL REBOUND SLIGHTLY INTO
THE LOWER TO MID 30S FOR THE PLAINS. THE REPRIEVE FROM SNOW WILL BE
SHORT LIVED AS INCREASED MOISTURE WILL MOVE INTO NE CO AHEAD OF THE
NEXT INCOMING TROUGH SUNDAY AFTERNOON. THIS MOISTURE OVER THE
MOUNTAINS COMBINED WITH INCREASED LAPSE RATES BETWEEN 7-8 C/KM WILL
AID IN BRINGING LIGHT SNOW SHOWERS TO THE NORTHERN MOUNTAINS BY
SUNDAY AFTERNOON AND EVENING. UPPER LEVEL WINDS WILL CHANGE TO A
MORE WESTERLY DIRECTION BY SUNDAY EVENING AS THE NEXT TROUGH DROPS
INTO UTAH. THE BEST CHANCE FOR SNOW WILL BE STARTING MONDAY MORNING
THROUGH TUESDAY MORNING WITH THE JET MOVING SE INTO CENTRAL COLORADO
BRINGING THE COOLER AND MORE UNSTABLE PORTION OVER THE SOUTHERN HALF
OF OUR CWA. SOME LIGHT ACCUMULATION WILL BE POSSIBLE WITH MORE ALONG
THE PALMER DIVIDE. WITH THE BACK DOOR ARCTIC COLD FRONT MOVING INTO
EASTERN CO BY 12Z MONDAY SNOW WILL BE LIKELY ON THE PLAINS WITH
TEMPERATURES ONLY GETTING INTO THE LOWER TEENS.

ON TUESDAY THE COLD TEMPERATURES WILL CONTINUE WITH HIGHS NOT MAKING
OUT OF SINGLE DIGITS AND LOWS OVERNIGHT MONDAY GETTING A FEW DEGREES
BELOW ZERO. WITH THE COOLER AIR COMBINED WITH MOISTURE AND THE JET
OVERNIGHT SNOW SHOWERS WILL CONTINUE THROUGH TUESDAY INTO TUESDAY
EVENING...ESPECIALLY OVER THE EASTERN CO BORDER WHERE QG DYNAMICS
ARE DECENT.

FOR TUESDAY NIGHT INTO WEDNESDAY A SURFACE HIGH PRESSURE WILL MOVE
SOUTH INTO EASTERN COLORADO HELPING TO DRY OUT THE PLAINS WHILE
KEEPING SOME LIGHT SNOW OVER THE MOUNTAINS FROM LINGERING MOISTURE.
THE LOW PRESSURE SYSTEM WILL BE CENTERED JUST SOUTH OF THE GREAT
BASIN BY 12Z WED KEEPING MOISTURE OVER THE SOUTHERN MOUNTAINS AND
STRONG SW FLOW AT UPPER LEVELS. THERE IS LITTLE JET SUPPORT BUT SOME
SNOW WILL BE POSSIBLE OVER THE SW PORTIONS OF THE STATE THURSDAY
INTO FRIDAY. FOR OUR REGION HOWEVER THE MOISTURE WILL NOT MAKE IT
FAR ENOUGH NORTH TO BRING SNOW BUT WE WILL HAVE CLOUD COVER ON
FRIDAY. TEMPERATURES WILL BEGIN TO REBOUND ON WEDNESDAY WITH HIGHS
IN THE MID TEENS AND ONTO THURSDAY AND FRIDAY WHERE WE WILL FINALLY
GET ABOVE FREEZING.

&&

.AVIATION...(FOR THE TAFS THROUGH 18Z SATURDAY MORNING)
ISSUED AT 332 AM MST SAT DEC 27 2014

VFR CONDITIONS OVER THE NEXT 24 HOURS. SW WINDS THIS MORNING MAY
BECOME SSELY THIS AFTN THEN BACK TO DRAINAGE THIS EVENING. AT KBJC
COULD SEE GUSTY WLY WINDS DEVELOPING AFTER 09Z AS A WEAK MOUNTAIN
WAVE DEVELOPS.

&&

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

$$

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


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