National Weather Service National Headquarters

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FXUS65 KBOU 082216
AFDBOU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
316 PM MST SUN DEC 8 2013

.SHORT TERM...THE SNOW IS PRETTY MUCH OVER ACROSS THE CWA...EVEN IN
THE MOUNTAINS. NORTH-NORTHWESTERLY BOUNDARY LAYER WINDS ARE
COMING UP OVER THE PLAINS AT THIS TIME. SATELLITE PICTURES ARE
SHOWING A BATCH OF CLOUDS UPSTREAM OVER WYOMING...IDAHO AND
MONTANA MOVING THIS WAY. MODELS SHOW WEST-SOUTHWESTERLY FLOW ALOFT
FOR THE CWA OVERNIGHT. THE BACK SIDE OF THE UPPER TROUGH AXIS
MOVES INTO THE CWA MONDAY AFTERNOON...WITH NORTHERLY FLOW ALOFT
OVER THE WESTERN CWA BY 00Z LATE AFTERNOON. BY MONDAY...PRETTY
STRONG SYNOPTIC SCALE DOWNWARD MOTION IS OVER THE FORECAST AREA
ACCORDING TO THE QG VERTICAL VELOCITY FIELDS. THE BOUNDARY LAYER
FLOW WILL ATTEMPT TO GO TO NORMAL DIURNAL PATTERNS OVERNIGHT
...THEN DOWNSLOPING WESTERLIES ARE PROGGED ON MONDAY. FOR MOISTURE
...IT DRIES OUT SIGNIFICANTLY OVER THE EASTERN HALF OF THE CWA
TONIGHT...STAYING PRETTY DRY MONDAY. MOISTURE SLOWLY DECREASES
OVER THE MOUNTAINS TONIGHT INTO MONDAY MORNING. THE QPF FIELDS
HAVE A TAD OF MEASURABLE SNOW IN THE HIGH COUNTY OVERNIGHT. FOR
POPS...WILL LEAVE "CHANCE"S IN THE MOUNTAINS OVERNIGHT...THEN
"SLIGHT CHANCE"S MONDAY MORNING. THIS WITH THE SATELLITE PICTURES
IN MIND. FOR TEMPERATURES...IT SHOULD BE PRETTY COLD TONIGHT WITH
THE CLEARING EXPECTED. MONDAY`S HIGHS LOOK A BIT WARMER THAN
TODAY`S...BUT NOT MUCH.

.LONG TERM...THE LONGWAVE TROUGH MOVES EAST EARLY IN THE
WEEK...LEAVING US IN A GENERALLY DRY AIRMASS WITH FAIRLY LIGHT
WESTERLY FLOW ALOFT. THERE ARE SEVERAL WEAK SHORTWAVES RUNNING
AROUND. FIRST TWO RIPPLES IN THE NORTHERN STREAM ABOUT MONDAY
NIGHT AND AGAIN TUESDAY NIGHT. THESE SHOULD KEEP SOME CLOUD COVER
AND MAY BRING A LITTLE SNOW TO THE HIGH COUNTRY. BY WEDNESDAY WE
ARE UNDER A FLAT RIDGE WITH FAIRLY WARM AIR ALOFT. HOWEVER THERE
WILL BE A WEAK FRONT BEHIND THE TUESDAY NIGHT SHORTWAVE THAT WILL
LIKELY KEEP TEMPERATURES ON WEDNESDAY ABOUT THE SAME AS TUESDAY.
A LITTLE BETTER AGREEMENT ON THE WEAK SYSTEM IN THE SOUTHERN
STREAM FOR THU/FRI...MOST OF THE IMPACT SOUTH OF US AND ALSO
PRETTY DRY ANYWAY. WILL LIMIT THE MENTION OF ANY SNOW CHANCE TO
THE MOUNTAINS. STILL MORE UNCERTAINTY ABOUT THE NEXT UPSTREAM
TROUGH...BUT THE CONSENSUS IS WEAKER AND STILL A PRETTY DRY
ENVIRONMENT.

&&

.AVIATION...WINDS WILL BE WEAK MUCH OF THE NIGHT...AND WILL TRY TO
GO DRAINAGE AT SOME POINT. DOWNSLOPING WESTERLIES LOOK TO BE A
GOOD BET ON MONDAY...BUT SPEEDS DO NOT LOOK SIGNIFICANT. THERE
SHOULD BE NO MORE CEILING ISSUES AT DIA TONIGHT OR MONDAY.

&&

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

$$

SHORT TERM...GIMMESTAD
LONG TERM....RJK
AVIATION...GIMMESTAD