Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 329 PM EDT Sun Mar 17 2019 Valid 00Z Mon Mar 18 2019 - 00Z Wed Mar 20 2019 ...Quiet weather for much of the CONUS through the short range... ...Major to historic river flooding will continue across parts of the Mississippi and Missouri River Basins... ...Warm temperatures and snow melt may lead to areal flooding across portions of the Northwest and Northern/Central Rockies... A lingering frontal boundary, that will drift into the Caribbean, will bring daily chances for showers and thunderstorms for Florida. Light rain/snow showers will be possible from portions of the Ohio Valley to the Mid-Atlantic through Monday as a weak low pressure system passes through the region. Surface high pressure will keep most of the contiguous U.S. with cool and calm conditions. Temperatures are forecast to be just near or below normal east of the front range with portions of the Appalachian region 10-20 degrees cooler than those typical for mid-March. Relatively warmer temperatures across the western states is allowing snow melt to cause run off- low-lying areas may experience areal flooding. Major to historic river flooding is expected to continue across parts of the Missouri and Mississippi River basins where heavy rainfall last week resulted in rapid snow melt. Flood warnings and advisories remain in effect for some locations. Warmer than average temperatures across the Northwest and Northern Rockies may also lead to accelerated snow melt for lower elevations and potential flooding issues. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php