Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 347 PM EDT Sun Mar 31 2019 Valid 00Z Mon Apr 01 2019 - 00Z Wed Apr 03 2019 ...Rain and mountain snow to enter the western U.S. on Monday and spread into the Rockies early this week... ...A developing coastal storm could bring rain to the Southeast by Tuesday... ...Much cooler temperatures to start the week in the eastern U.S., while the West Coast remains warm... In the Four Corners region and into the Southern High Plains, rain and snow are possible through Sunday night as upper-level energy moves through. Farther north, a surface low and frontal boundary will lead to rain and light snow showers beginning by Sunday evening in the Northern High Plains, and bumping a bit southward on Monday. A stronger low will approach the West Coast late Sunday and into Monday, and moisture will increase with it. Showers will spread into the Pacific Northwest by Sunday night and become more widespread on Monday across the Intermountain West, with higher elevation snow into the Rockies. Snow will continue across the Rockies into Tuesday, with upwards of a foot of snow forecast across the higher elevations of western Wyoming. A cold front will finish its trek through the Eastern Seaboard Sunday night, with rain showers lingering across northern Florida. In the cold air behind the front, the Lower Great Lakes region and into northern New England could see scattered snow showers. Light rain will remain along the Gulf Coast through the beginning of the week, and particularly increase in Florida by Monday and Tuesday as a surface low develops. The low pressure system is forecast to further organize off the Southeast coast on Tuesday and could bring additional showers across Georgia and the Carolinas. Rain will be possible across coastal portions of the Mid-Atlantic by Tuesday night. After a warm end of last week, the eastern U.S. will start this week much cooler behind the cold front. These areas and back into the Lower Mississippi Valley and Southern Plains are expecting high temperatures of 15 to 25 degrees below average. Freeze Warnings are in effect from the Lower Mississippi Valley eastward into the Tennessee/Lower Ohio Valleys, as well as into portions of central North Carolina. Meanwhile, the West Coast is expecting high temperatures about 10 degrees above average for the beginning of the week. Snell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php