Area Forecast Discussion
Issued by NWS Boise, ID

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS65 KBOI 180252

Area Forecast Discussion
National Weather Service Boise ID
852 PM MDT Thu Aug 17 2017

.DISCUSSION...Dry west/northwesterly flow aloft through Saturday
with clear skies and normal temperatures.  Wildfires in Oregon will
spread areas of smoke across our CWA but dense smoke is not
expected.  No updates.

On Monday along the eclipse path, fewest clouds (about 5% sky cover)
will be found in eastern Oregon, with 5% to 10% sky cover in western-
most Idaho, ramping up to 15% coverage in central Idaho.  More
clouds will be to the south, fewer clouds to the north of the path.
At eclipse time the sun will be relatively high in the southern sky,
and our CWA should be in the clear along the path of totality.
Current amounts of smoke should not hinder the view.  Any blockage
of the partial eclipse due to clouds would be in south-central Idaho,
more so near the Nevada border.


SHORT TERM...Tonight through Saturday...A dry west/northwest flow
will persist through Saturday keeping skies mostly clear.
Temperatures are expected to be within a few degrees of normal.
See long term discussion for eclipse-related weather information.

LONG TERM...Saturday night through Thursday...Westerly flow will
continue through the weekend with high clouds passing by and
seasonable temperatures. Expect partly cloudy skies for the eclipse
viewing, with best chances of cloudiness toward Twin Falls and the
NV border. Haze and smoke could be present from area wildfires.
Temperatures will briefly lower 5-15 degrees during the eclipse. By
Monday evening, the flow will turn southerly as a trough over CA
brings moisture north from the Great Basin Tuesday into Wednesday.
Expect increased cloudiness and a slight chance of thunderstorms
under the southerly flow each afternoon, mainly over the higher
terrain. Temperatures will warm to around 5 degrees above normal
Tuesday through Thursday. A shortwave looks poised to move across
the area late Wednesday into Thursday as the flow aloft shifts to
southwesterly from a deep trough in the Gulf of Alaska.





PREV LONG TERM....KA/WH is the U.S. government's official web portal to all federal, state and local government web resources and services.