Area forecast discussion 
National Weather Service Denver/Boulder Colorado 
322 PM MST Tuesday Jan 27 2015 


Short term...(this evening through wednesday) 
issued at 322 PM MST Tuesday Jan 27 2015 


The upper ridge axis has shifted east of Colorado...allowing for a 
bit southwesterly flow aloft. High level cloudiness has been 
moving over the state...but deeper moisture over Arizona seems to 
be lacking on satellite imagery. Additional moisture will move up 
out of Baja California California through the next 24 hours. Mountain areas 
could still see some light snow late tonight and then through 
tomorrow. At the surface...cooler air will begin moving into 
northern Colorado as the Lee trough in place this afternoon moves 
eastward. Temperatures will be much closer to seasonal normals 
tomorrow afternoon. Previous forecasts had everything pretty well 
handled...so not many changes were necessary this time around. 


Long term...(wednesday night through tuesday) 
issued at 322 PM MST Tuesday Jan 27 2015 


Tomorrow's short wave trough should pretty much be east of the 
state by 00z Thursday with decent q-g subsidence covering the 
County Warning Area. Winds will be on the decrease through the evening hours in 
all areas. Some moisture lingering in the mountains will likely be 
sufficient to keep orographic snow showers going there overnight. 


Generally dry conditions will prevail throughout the area 
Thursday and Thursday night as an upper level ridge moves through 
the central rockies. Dry conditions will continue on the plains 
Friday with an increasing threat of precipitation in the high 
country during the day Friday into the weekend. This threat is due 
to the increasing and steady...but relatively weak...qg ascent 
overspreading the area ahead of the next trough. Two pieces of 
trough appear to consolidate over the central rockies by 
Saturday...the main one coming in from the Desert Southwest and 
a secondary one dropping southeast from the Pacific northwest. 
The chunk coming in from the northwest brings low level high 
pressure and anticyclonic upslope to the plains during the day 
Saturday which will lead to the best chance of precipitation in 
The Lowlands occurring at that time. 


After this trough passes...moderate northwest flow aloft will 
prevail keeping breezy conditions in the mountains along with at 
least some threat of orographic snow showers there. The plains 
should be dry with seasonal temperatures returning early next 
week. 


&& 


Aviation...(for the tafs through 00z Wednesday late afternoon) 
issued at 322 PM MST Tuesday Jan 27 2015 


No aviation impacts overnight and through tomorrow. 


&& 


Bou watches/warnings/advisories...none. 


&& 


$$ 


Short term...dankers 
long term...et 
aviation...dankers 






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