Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 326 PM EDT Sat Oct 06 2018 Valid 00Z Sun Oct 07 2018 - 00Z Tue Oct 09 2018 ...The multi day Heavy rain/Flash Flooding event will continue across the Southern to central Plains into the Mid to Upper Mississippi Valley region... ...A strong front stretching from the Southern Plains into the Lower Lakes region will separate much below normal temperatures across the Northern Rockies...Northern to Central Plains from much above average temperatures from the Mississippi Valley into the Ohio Valley and northeast.. ...Early Season Heavy snow possible across the Wasatch into the Central to Northern Rockies and portions of the Northern High Plains... The multi-day heavy rain and possible flash flooding event will continue across portions of the Southern to Central Plains...into the Mid to Upper Mississippi Valley region. This event will be in the vicinity of a strong frontal boundary that will remain nearly stationary for most of this period from the Southern Plains...northeast into the Mid Mississippi Valley and into the Lower Great Lakes. Much above average moisture values in the vicinity of this front...combined with very favorable right entrance region jet dynamics aloft...will support the likelihood of rounds of potentially heavy to excessive precipitation amounts moving along the frontal boundary. This frontal boundary will be the dividing line between much below average temperatures that will persist Saturday-Sunday and Monday over the Central to Northern Plains and Central to Northern Rockies region...and much above average temperatures from the Mid Mississippi Valley...Ohio Valley and into portions of the Northeast and Mid-Atlantic. The amplifying mid to upper level trof over the Great Basin and Southwest...will support early season heavy snows from the Wasatch of Utah into the Central to Northern Rockies. Accumulating snows may push eastward into the Northern High Plains Sunday from northeast Wyoming into western South Dakota. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php