Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 309 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. Elsewhere, upper-level energy moving out of Northeastern Mexico will move eastward to Florida by Sunday. The energy will produce rain over parts of Florida from overnight Saturday into Sunday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php