Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Mon Apr 01 2019 Valid 12Z Mon Apr 01 2019 - 12Z Wed Apr 03 2019 ...Rain and mountain snow will spread across the Northwest and into the Northern/Central Rockies... ...Rain possible for the Southeast Monday and for the Atlantic coast on Tuesday as a coastal low develops... ...Temperatures will remain colder than average for the Southern Plains to the Northeast on Monday... On Monday, a low pressure system will slowly approach the Pacific Northwest, increasing moisture and the chance for precipitation in the Northwest and into northern California. On Tuesday, the low moving through the Intermountain West is expected to lead to snow into the Northern and Central Rockies, and snow and rain should spread into the Plains by Wednesday morning. Heavy snows of 8 to 12 inches are possible in the Sierra Nevada, while 4 to 8 inches of snow is forecast for the Wind River Mountains/Tetons. Ahead of this low system, light rain and snow showers are possible on Monday across the Northern Rockies to Northern Plains associated with a frontal boundary. Precipitation will spread into the Upper/Middle Mississippi Valley and into the Upper Great Lakes region by Monday night. A swath of 1 to 3 inches of snow is possible across these areas with this system. A quasi-stationary front will linger across Florida on Monday and Monday night, so showers and thunderstorms are likely there. As an upper-level trough approaches on Monday night and into Tuesday, a surface low will strengthen and move northeastward east of the Atlantic coast. While the heaviest rain should remain offshore, rain could spread to Georgia and the Carolinas on Monday night, into the Mid-Atlantic on Tuesday, and into the Northeast by Wednesday morning. Light snow could mix in where the precipitation reaches higher elevations of the Southern Appalachians, as well as in the Northeast. Temperatures are expected to remain cooler than average on Monday across the Southern Plains east and northward into the Northeast. A few record low minimum and maximum temperatures are possible across Texas and the Lower Mississippi Valley, and Freeze Warnings are in effect for parts of the Lower Mississippi, Tennessee, and Lower Ohio Valleys, and into North Carolina. Temperatures should moderate some on Tuesday, though the Carolinas will remain 15 to 20 degrees below average. Warmer than average spots for the beginning of the workweek will be the Pacific Northwest and the Southwest. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php