EUGENE, Ore. - Imagine a map of Oregon.
Now draw a line from Newport east to Corvallis and up the Cascades to Santiam Pass.
If you live above that line, you might see snow flurries Thursday night and Friday.
If you live below that line, get ready to see some snow stick and stack up on the ground.
That's the current outlook from National Weather Service forecasters who have been tracking a possible snow event all week.
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The forecast has changed some, with the system likely sparing the Portland area from any measurable snowfall.
But forecasters increasingly believe we will see snow in Lane, Douglas and Coos counties - and lots of it.
As of Friday morning, forecasters expected to issue a Winter Storm Warning for Coos Bay, Roseburg and surrounding cities. "A Winter Storm Warning for heavy snow means severe winter conditions are expected," forecasters explained. "Significant amounts of snow are forecast that will make travel dangerous."
Forecasters are still watching the southern Willamette Valley, where the threat of snow is increasing.
"Most likely areas we will need to deal with snow advisories as we get closer will be near the coast and inland bordering the south valley areas," a forecaster noted in the short-term forecast discussion. "The one place we could get close to the 4 inch heavy snow criteria is the lower elevations of Lane County."
That will be a wait-and-see situation: as of Thursday morning, forecasters feel confident the Eugene area will see at least 1 to 2 inches of snow, with more in the Cascade foothills.
"The heaviest snow will likely occur between 5 a.m. and 2 p.m. Friday," the weather service said. "Total snow accumulations should generally be around 1 to 2 inches along the central Oregon Coast and in the southern Willamette Valley. Areas in the central Oregon Coast Range and the Lane County Cascades and foothills may see 2 to 4 inches."