Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 322 AM EDT Tue Jul 30 2019 Valid 12Z Tue Jul 30 2019 - 12Z Thu Aug 01 2019 ...Active showers and thunderstorms possible across portions of the Southwest into the Great Basin... ...Much above average temperatures expected for the Central to Southern High Plains... ...A slow moving cold front will support widespread showers and storms Showers and storms from the Western to Central Gulf Coast, Tennessee Valley, Ohio Valley and into the Northeast. Much above average temperatures expected ahead of this front Tuesday over the Northeast.. An upper level high is forecast to remain centered over the Southern Rockies/Southern High Plains region over the next few days. This will pump much above average levels of moisture northward from northwest Mexico into Southern California, the Southwest and the Great Basin. Upper level disturbances embedded in this above average moisture plume will enhance shower and thunderstorm activity across these areas over the next two days with locally heavy rains and isolated flash flood potential. The potential for wet weather across these areas will also keep temperatures below average. This is especially so on Wednesday when high temperatures will be 10 to 15 degrees cooler than average across much of Arizona, Utah, southeast Nevada into southeastern California. While showers and storms will be active on the western peripheries of the Southern Rockies/Southern High Plains upper high, much above average temperatures will dominate the eastern portion of this upper high. Temperatures likely to soar to over a 100 degrees over the next few days across much of the Central to Southern High Plains. A slow moving cold front will be pushing eastward from the Lower Great Lakes, Ohio Valley, Lower Mississippi Valley Tuesday, through much of the Northeast, Mid-Atlantic into the Central to Southern Appalachians by early Thursday. Widespread scattered showers and thunderstorms will focus along and ahead of this front with locally heavy rains and isolated severe weather. Ahead of this front, much above average temperatures expected across the Northeast on Tuesday. Heat advisories are in effect Tuesday from southeast NY State into southern New England, including New York City, Albany, Hartford, Providence and Boston. In the wake of this front, an area of high pressure moving from the Upper Mississippi Valley into the Great Lakes will spread below average temperatures and low humidity across the Upper Mississippi Valley and Upper Lakes Tuesday, into the Mid Mississippi Valley and Ohio Valley on Wednesday. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php