Area forecast discussion 
National Weather Service Denver/Boulder Colorado 
353 am MDT Sat Oct 25 2014 

Short term...(today through tonight ) 
issued at 345 am MDT Sat Oct 25 2014 

Broad ridge of high pressure will cover Colorado today with a dry 
and stable airmass. Should be a cloudless daytime with 
temperatures similar to yesterday. Record high temperature is 
again 80 degrees at Denver and readings today will be right 
around that 80 degree mark. 

The next upper level Pacific system will move onshore today which 
will gradually push the ridge east of Colorado tonight. This will 
allow the flow aloft to become more westerly and increase after 
midnight. Expect increasing winds over mountains and foothills as 
cross barrier flow increasing to 40kt and mountain top stability 
developing after midnight. This will result in local gusts in the 
50-60 miles per hour in wind prone areas later tonight. Main change to 
forecast was to increase winds a little later tonight. Some 
increase in middle and high level clouds later tonight in the mountains 
but not expecting any showers until Sunday daytime. 

Long term...(sunday through friday) 
issued at 309 am MDT Sat Oct 25 2014 

Sunday morning will start out quite breezy...especially along the 
Front Range foothills and urban corridor. Cross sections show 
about 50 kts of Cross Mountain flow around 650 mb with a minimum 
of 15 knots around 450 mb. Not the best mountain wave/downsloping 
wind pattern but still quite good. Will likely see gusts in the 40 to 
50 miles per hour in the upper foothills in the normal windy spots with some 
gusts in the 20 to 30 miles per hour into the western sections of the urban 
corridor. The upper trough will continue pushing into the state 
during the day as the surface low deepens along the Colorado/Kansas state 
line. Cooler temperatures will be pushed in ahead of the trough 
and slightly more cloud cover will assist in a cooler day compared 
to today. Mountain locations will see this effect first and will 
have temperatures about 10 degrees cooler. This will help humidity 
not bottom out too much with the gusty right now no 
highlights are needed as humidity readings look to stay in the 20 
percent range. Winds will likely stay pretty gusty as the 
associated cold front begins nearing. Moisture...which seems 
meager with better amounts found further expected to 
spread over the mountains Sunday afternoon with snow levels around 
10 thousand feet or higher. A better push looks to arrive in the 
evening where snow levels may drop to near 8000 feet...except over 
the far northern mountains where they may be closer to 6000. 

The cold front is currently expected to push south into the area 
late Sunday night...may see some light showers over the plains as 
this occurs. The upper trough should pass over the area Monday 
morning while weak upslope flow will occur. Looking at cross 
sections and soundings...airmass seems quite dry. Lowered probability of precipitation 
slightly...but kept a chance category for the Palmer Divide and 
eastern plains. Temperatures will likely be about 20 degrees 
cooler Monday as the system moves quickly across the area. 
Clearing skies behind it on Monday night will allow for near or 
below freezing temperatures. 

Northwest flow aloft sets up through Thursday with a return to dry 
and warmer temperatures. A weak disturbance in the flow late 
Wednesday will likely cause slight cooling before additional warmth 
moves in Friday 


Aviation...(for the tafs through 12z Sunday morning) 
issued at 345 am MDT Sat Oct 25 2014 

VFR with clear skies for all of today. Surface winds similar to 
yesterday...starting southerly and then shifting southeast and 
east this afternoon. Speeds will generally be under 10kt. May see 
a bit stronger west wind surfacing at bjc later tonight and Sunday 


Bou watches/warnings/advisories... 


Short term...entrekin 
long term...kriederman 

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