931 
FXUS65 KBOU 081021
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
321 AM MST Sun Jan 8 2023

.SHORT TERM...(Today and tonight)
Issued at 315 AM MST Sun Jan 8 2023

Current conditions include upper level cloudiness moving into and
across the CWA from the west. There is also a small batch of 
Stratus and fog over central Weld and west central Morgan 
Counties. Greeley is reporting 1/4SM in the fog. Temperatures have
a decent range across the plains at this time. Areas in the 
drainage winds are in the 20s and lower 30s F. The rest of the 
plains are in the teens and single digits F.

Upper ridging will continue to push eastward across the CWA today 
and this evening.  The flow aloft will be pretty weak from the west, 
then southwest. By 12Z Monday morning, stronger northwesterly 
flow aloft is just getting into the western CWA. There is weak 
synoptic scale vertical velocity progged today into this evening. 
Weak downward motion follows overnight. The low level winds look 
to be pretty light today and tonight, mainly adhering to normal 
diurnal patterns. There is some upper level moisture for the CWA 
today and tonight. Models show some shallow low level moisture to 
get into the high mountains after midnight. As a result, the only 
pops, 10-30%s, will be in Zone 31. High temperatures today should 
be 0-2 C warmer than yesterday's highs. 

.LONG TERM...(Monday through Saturday)
Issued at 204 AM MST Sun Jan 8 2023

A flat upper level ridge will be over the area on Mon with a sfc lee 
trough along the I-25 Corridor.  Overall it will be a dry day with 
warmer temps.  Readings across the plains will be in the 40s with 
lower to mid 50s around the Denver area.  Cross-sections show gusty 
winds will occur over the higher terrain as cross-barrier flow is in 
the 30-35 kt range.

By Tue, moisture will increase in WSW flow aloft over the higher 
terrain. Lapse rates will become more unstable by aftn so expect 
an increase in snow showers over those mtn areas favored by a WSW 
orographic component. Across the plains it will be dry with highs 
ranging from the mid 40s in snow covered areas with 50's where 
snowpack is less. Winds will remain gusty over the higher terrain.

For Tue night into Wed, a fast moving storm system will move across 
the area.  This system has favorable QG ascent and lapse rates with 
it.  As a result should see snow in the mtns with a good chance of 
rain and snow showers at lower elevations.

Looking ahead to Thu and Fri, an upper level ridge will build into 
the area.  This will allow for dry conditions and a warmer 
temperatures by Fri as readings rise into the 50's over nern CO.

&&

.AVIATION...(For the 12Z TAFS through 12Z Monday morning)
Issued at 321 AM MST Sun Jan 8 2023

South-southwesterly winds are expected to continue at DIA into the
early afternoon hours today. Models then show some weak east or 
southeasterlies through around 01Z in the evening. Then it is back
to drainage winds Sunday evening into Monday morning. There will 
be no ceiling issues. 

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...RJK
LONG TERM....RPK
AVIATION.....RJK