Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 256 AM EST Sat Jan 28 2017 Valid 12Z Sat Jan 28 2017 - 12Z Mon Jan 30 2017 ...Lake effect/lake enhanced snow possible downwind of the Great Lakes... High pressure over the Great Basin/Northern Rockies will dominate the weather over the western two-thirds of the country. Off shore flow associated with the high will produce Santa Ana wind over parts of Southwestern California through Saturday morning. Meanwhile, a deep upper-level trough over the eastern half of the country will have multiple upper-level energy centers passing through the trough. In addition, a front over Southern Ontario will move southward to the Lower Great Lakes and eastward to New England by Sunday evening. The eastern portion of the boundary will dissipate while a new front will develop off Mid-Atlantic/Southeast Coast by Sunday, too. Cold air and upper-level energy moving over the Great Lakes will produce lake effect/lake enhanced snow downwind from the Great Lakes and into parts of Northern New England and Northern/Central Appalachians through Sunday. Similarly, upper-level energy moving over the Ohio Valley will aid in producing light snow over parts of the Ohio/Tennessee Valleys on Sunday into Sunday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php