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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Friday
• 
• High: 36 °
• Low: 18 °
• Clear

• Saturday
• 
• High: 41 °
• Low: 27 °
• Partly Cloudy

• Sunday
• 
• High: 45 °
• Low: 31 °
• Partly Cloudy

• Monday
• 
• High: 43 °
• Low: 29 °
• Chance of Rain

• Tuesday
• 
• High: 43 °
• Low: 29 °
• Partly Cloudy

Area forecast discussion 
National Weather Service Boise Idaho 
954 am MST Friday Jan 27 2012 


Discussion...dry and stable northwest flow today. High clouds will 
move through the flow...otherwise it will be a mostly sunny day. 
Only update this morning will be for some minor adjustments to sky 
cover. 


&& 


Aviation...VFR under mostly clear skies. Patchy valley fog possible 
overnight near kbno...kbke...and kmyl. Light surface winds. 
Northwesterly winds aloft at 12k feet mean sea level will average 30 kts. 


Weekend outlook...VFR through Sunday evening when the next system is 
expected to push onshore from the west. 


&& 


Previous discussion... 
short term...today through Saturday...low clouds over central Idaho 
this morning could produce a few flurries. Long Valley could still 
see a few hours of patchy fog this morning. Warming aloft later this 
morning will inhibit precipitation. Gusty winds overnight to 30 miles per hour in 
parts of the Treasure and Magic Valleys will be drop off to 10-20 
miles per hour around 7 am and continue to diminish to light 10 miles per hour or less for 
today...as the pressure gradient over the area drops off to 4 
millibars by sunrise. Dome of high pressure over the area this 
afternoon along with strengthening subsidence inversion aloft will 
result in little mixing...but lots of sunshine. Some low level 
moisture looks to remain over the sheltered Idaho valleys. Some snow 
melt in the Weiser basin to Burns this afternoon should allow some 
low level moisture to pool up over the lower Treasure valley 
tonight...so some limited stratus or fog is possible tonight. As the 
surface high shifts east Saturday and ridging aloft continues to 
shift inland...milder east to south return flow will bring highs 
back above normal especially across southeast Oregon. Moisture aloft will 
cross through the ridge across the area Saturday for more cloudiness 
than today. 


Long term...Saturday night through Friday...models agree on the 
progressive westerly flow maintaining mild unsettled weather through 
Wednesday...followed by gradual drying Wednesday night through 
Friday as an upper level ridge amplifies over the intermountain 
region. Temperatures will average around 5 degrees above average. 
The wettest period will be Sunday night and Monday as a relatively 
strong shortwave trough embedded in the westerly flow aloft crosses 
our area. There are minor timing differences but models all agree on 
this feature. We raised probability of precipitation and quantitative precipitation forecast/S for that period based on 
consensus of latest model runs. 


&& 


Boi watches/warnings/advisories... 
Idaho...none. 
Or...none. 
&& 


$$ 


Weather.Gov/Boise 


Discussion...bw 
aviation.....Bb 
previous short term...vm 
previous long term....jt