Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 343 PM EDT Tue Apr 05 2016 Valid 00Z Wed Apr 06 2016 - 00Z Fri Apr 08 2016 ...Below average temperatures for much of the eastern U.S... ...High winds possible from portions of the northern Rockies to the northern plains... ...Low pressure system to bring precipitation to much of the central and eastern U.S. through Wed... Surface high pressure will keep a colder airmass over a majority of the eastern third of the U.S. through late Wednesday afternoon. Numerous counties along the north-central Appalachians and across the Mid-Atlantic have freeze warnings in effect. Temperatures tonight will be about 10 to 20 degrees (F) below normal for early April, with many locations dropping into low 30s, and even the 20s during the overnight hours. Temperatures will moderate Thursday and Friday as a low pressure system tracks from the Midwest into the Ohio/Tennessee Valley/Appalachians region. High winds have developed today east of the Rockies as a strong low pressure tracked across the northern High Plains. High Wind Warnings are in effect for the eastern Montana, northeast Wyoming and western portions of the Dakotas. Rain and snow is accompanying the northern flank of the system with rain and thunderstorms farther south across the central and southern plains. The low pressure system will move into the Upper Midwest tonight/early Wednesday morning, spreading snow across the northern Great Lakes and rain and thunderstorms from the Ohio and Tennessee valleys into the Southeast. Much of the East Coast will have rain by Wednesday night, with snow possible for northern Maine. Another low pressure will swing through the same region on Thursday, bringing additional precipitation. Excessive rain will be possible for the portions of New England by Friday morning. Up to 3 inches is forecast for Maine. Warm conditions will persist across the southwestern U.S., however light showers will develop along a nearly stationary boundary through Friday. Accumulations up to 0.50 inch will be possible from northern California to west Texas -with up to 1 inch for Southern California. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php