Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 1249 PM EDT Mon Apr 01 2019 Valid 00Z Tue Apr 02 2019 - 00Z Thu Apr 04 2019 ...Rain/mountain snow spreads across the Northwest and into the Northern/Central Rockies... ...More precipitation expected for flooded areas of the Upper and Middle Mississippi Valleys... ...Record cold high temperatures possible across Texas & the Lower Mississippi Valley this afternoon... ...Record cold high temperatures possible for the Carolinas Tuesday afternoon... On Monday, a low pressure system will slowly approach the Pacific Northwest, increasing moisture and the chance for precipitation from the Northwest into northern California. By Tuesday, the low traversing the Intermountain West is expected to lead to snow into the Northern and Central Rockies, and snow and rain should move into the Plains on Wednesday. The highest snowfall totals are expected in higher elevations--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. Light rain and snow showers are possible on Monday across the Northern Rockies to Northern Plains near a front trailing from a weak area of low pressure fading as it crosses the Great Lakes. Precipitation will spread into the Upper/Middle Mississippi Valley and into the Upper Great Lakes region by Monday night and Tuesday as the low approaches. A swath of 1 to 3 inches of snow is possible with this system. This precipitation will not be welcome as nearly the entire length of the Mississippi river remains in flood due to a combination of precipitation and snow melt. A quasi-stationary front will linger across Florida into Tuesday before progressing southward through the Florida Straits Tuesday night as a low develops and moves offshore roughly parallel to the Eastern Seaboard, leading to showers and thunderstorms across the Sunshine State -- isolated strong thunderstorms are possible. As the surface low strengthens while moving northeastward east of the Atlantic coast, rain spreads up the coastal plain of Georgia and the Carolinas tonight and Tuesday morning, through the Eastern Shore and Long Island on Tuesday, before clipping coastal New England by Wednesday morning. Localized flooding is a possibility along the coast of the Carolinas. Light snow could mix in where the precipitation reaches higher elevations of the Southern Appalachians and nearby Piedmont, as well as interior New England. Temperatures are expected to remain cooler than average this afternoon across the Southern Plains east and northward into the Northeast. A few record cold high temperatures are possible across Texas and the Lower Mississippi Valley this afternoon and across/near the Carolinas on Tuesday, with temperatures moderating thereafter. Warmer than average spots for the beginning of the workweek will be the Pacific Northwest and the Southwest. Roth/Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php