Area Forecast Discussion (National Weather Service)
AFDBOU
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER CO
325 AM MDT FRI SEP 3 2010
.SHORT TERM...ANOTHER DRY DAY IS SETTING UP ACROSS THE FORECAST AREA
AND TEMPERATURES WILL BEGIN THEIR WARMING TREND AS AN UPPER LEVEL
RIDGE BUILDS ACROSS THE DESERT SOUTHWEST. NORTHWEST FLOW WILL
DECREASE WHICH WILL ALLOW NORMAL AND LIGHT DIURNAL WIND PATTERNS
TODAY AND TONIGHT. THERE IS JUST ONE BATCH OF CLOUDINESS TRAPPED
UNDER THE SUBSIDENCE INVERSION STRETCHING FROM JUST EAST OF DENVER
TO THE LIMON AREA...BUT THIS WILL BE DISSIPATING EARLY THIS MORNING
AS AIRMASS CONTINUES TO DRY. HIGH TEMPERATURES WILL BE CLOSE TO 10
DEGREES WARMER ACROSS THE PLAINS AND FOOTHILLS...WITH ABOUT 2-4
DEGREES WARMING IN THE MOUNTAINS AND HIGH VALLEYS. CLEAR SKIES AND
A DRY AIRMASS WILL ALLOW FOR GOOD RADIATIONAL COOLING AGAIN TONIGHT.
.LONG TERM...A FLAT UPPER LEVEL RIDGE WILL BE RGN ON SAT WITH DRY
WLY FLOW ALOFT. 850-700 MB TEMPS WILL RISE AROUND 6 DEGREES C WHICH
WOULD ALLOW FOR HIGHS TO WRM INTO THE LOWER 90S ACROSS NERN CO.
ALTHOUGH HUMIDITIES WILL BE VERY LOW WINDS WILL BE MARGINAL FOR A
FIRE WEATHER WATCH. FOR SUN AN UPPER LEVEL TROUGH WILL DEVELOP OVER
THE NWRN US WITH INCREASING WSW FLOW ALOFT ACROSS NRN CO. 850-700
MB TEMPS RISE A FEW MORE DEGREES AND WITH DOWNSLOPE FLOW IN PLACE
HIGHS WILL RISE INTO THE MID TO POSSIBLY UPPER 90S ACROSS NERN CO.
MEANWHILE FIRE DANGER WILL BE EXTREME BY SUN AFTN INTO SUN NIGHT
WITH INCREASING WINDS AND VERY LOW HUMIDITIES.
FOR SUN NIGHT AND MON THE UPPER LEVEL TROUGH TO THE NW WILL QUICKLY
MOVE EASTWARD ACROSS THE NRN ROCKIES WITH RATHER STG WLY FLOW
ALOFT. LATEST GFS SHOWS SOME POTENTIAL FOR A BORA WIND EVENT LATE
SUN NIGHT INTO MON IN AND NR THE FOOTHILLS AND ACROSS NRN AREAS OF
THE PLAINS. IN ADDITION WITH DRY AIRMASS IN PLACE ONCE AGAIN FIRE
DANGER WILL BE ELEVATED. TEMPS WILL GRADUALLY BECOME COOLER ON MON
AS PACIFIC FNT MOVES ACROSS THE PLAINS. LATEST 850-700 MB TEMPS ARE
FCST TO DROP FROM 10-12 DEGREES C ON MON SO HIGHS MAY ONLY BE IN THE
70S ACROSS THE PLAINS. AS FAR AS PCPN CROSS-SECTIONS SHOW SOME MID
LVL MOISTURE SUN NIGHT WHICH COULD LEAD TO A SLIGHT CHC OF HIGH
BASED SHOWERS ALONG THE WY-CO BORDER. ON MON CROSS-SECTIONS SHOW
DRY AIRMASS OVER THE AREA SO PCPN CHANCES LOOK VERY LOW.
BY TUE A FLAT UPPER LEVEL RIDGE WILL REDEVELOP OVER THE AREA WITH
CROSS-SECTIONS STILL SHOWING A DRY AIRMASS. 850-700 MB TEMPS ARE
FCST TO RISE FROM 4 TO 5 DEGREES C WHICH WOULD ALLOW FOR HIGHS TO BE
AROUND SEASONAL NORMALS. FOR WED AN UPPER LEVEL TROUGH WILL
INTENSIFY OVER THE WRN US WITH SW FLOW ALOFT ACROSS NRN CO. MAY SEE
SOME INCREASE IN SUBTROPICAL MOISTURE AND WITH SELY LOW LEVEL FLOW
DEVELOPING EAST OF THE MTNS LOW LEVEL MOISTURE SHOULD INCREASE OVER
THE PLAINS. THUS MAY SEE AT LEAST A SLIGHT CHANCE OF TSTMS FOR
WED. HIGHS ON WED WILL WRM TO ABOVE SEASONAL LEVELS BASED ON
CURRENT 850-700 MB TEMPS.
.AVIATION...THERE IS A PATCH OF CLOUDINESS BETWEEN 11 AND 12
THOUSAND MSL JUST EAST OF KDEN...BUT THIS IS EXPECTED TO DISSIPATE
OR PUSH SLOWLY EASTWARD THROUGH THE EARLY MORNING HOURS. OTHERWISE
VFR CONDITIONS WILL EXIST WITH NEARLY CLOUD FREE SKIES THROUGH
TONIGHT. NORMAL AND LIGHT DIURNAL WIND PATTERNS WILL PREVAIL.
&&
.BOU WATCHES/WARNINGS/ADVISORIES...NONE.
&&
$$
BARJENBRUCH/RPK
Night time, Dry 
