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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 68 °
• Low: 41 °
• Partly Cloudy

• Thursday
• 
• High: 66 °
• Low: 43 °
• Partly Cloudy

• Friday
• 
• High: 72 °
• Low: 45 °
• Partly Cloudy

• Saturday
• 
• High: 75 °
• Low: 46 °
• Partly Cloudy

• Sunday
• 
• High: 81 °
• Low: 61 °
• Clear

Area forecast discussion 
National Weather Service Boise Idaho 
330 am MDT Wednesday Jun 19 2013 


Short term...today through Thursday...a narrow north-S oriented band of 
rainfall was situated across far southwestern Idaho this morning 
with light rain occurring at the Boise Airport. Heavier rainfall as 
indicated by radar was located just north of Boise and across the 
upper Weiser basin. Models depict this band of rainfall will shift 
to the northeast and exit the area by mid-morning. Meanwhile...a 
deep upper low centered off the Washington/or coast was still moving inland 
and was spreading showers into Oregon. The leading edge of the 
showers has reached Harney County and western Malheur County. The 
low will continue to move into the pacnw today with showers 
spreading into the remainder of southeast Oregon and most of SW Idaho by 
midday. Instability accompanying the cold low will result in 
isolated thunderstorms by late morning and lasting through the 
afternoon. While we are not anticipating any severe storms...heavy 
rain and small hail are possible. The upper low will gradually lift 
to our north tonight with showers decreasing from south to north. 
The low is expected to stall just to our north on Thursday. 
Thus...showers will linger across Baker County and the Boise/west 
central mountains. Snow levels will lower to around 6500 feet so the 
northern mountains could receive light snow accumulations tonight. 
Winds will remain gusty today then diminish tonight and Thursday. 
Temperatures will be rather cool today as highs will only be in the 
50s and 60s. Temperatures will be a little warmer on Thursday but still 
10-15 degrees below normal. 


Long term...Thursday night through Tuesday...good model agreement 
that an upper low will still be meandering over the northern rockies 
late in the week and then finally moving east Saturday. Models 
suggest multiple low centers with a spoke of energy rotating across 
central and southern Idaho Friday and Friday night before the system 
departs. This will keep a chance of showers in the forecast mainly 
for east central Oregon and the west central and Boise Mountains in 
Idaho through Friday night. Drying and temperatures warming to near 
normal for the weekend under a transient shortwave ridge. A chance 
of showers back in the forecast Sunday night through Monday... 
primarily for northern areas with a low amplitude westerly flow 
prognosticated to transport moisture across the forecast area. Toward the 
middle of next week models are hinting at the subtropical ridge 
building over The Four Corners vicinity which would bring drier 
Summer like temperatures to the forecast area. 


&& 


Aviation...a band of showers extending from near kmyl through kboi 
to the Nevada border...will lift northeast across the west central 
and Boise Mountains through 15z. A bit of a dry slot between this 
band and the next batch of showers and isolated thunderstorms which 
will spread across southeast and east central Oregon through early 
morning...and into southwest Idaho 14-15z timeframe. Greatest 
coverage will be across Baker County and the west central mountains. 
Local MVFR conditions in heavier showers. Showers shifting mainly to 
Baker County and west central and Boise Mountains after 06z 
tonight. 


Westerly surface winds increasing to 10-20kts gusts to 30kts... 
mainly from kbke to kjer and south...diminishing after 03z. 
Winds aloft will be westerly 20-25kts up through 10k feet mean sea level. 


&& 


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


$$ 


Weather.Gov/Boise 


Short term...bw 
long term....tl 
aviation.....Tl