Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 352 AM EDT Sun May 06 2018 Valid 12Z Sun May 06 2018 - 12Z Tue May 08 2018 ...Locally heavy rainfall possible across portions of the Northeast today, as well as along favored terrain in the northern Intermountain West... ...Triple digit heat likely for portions of the Desert Southwest... Moderate to locally heavy rain and thunderstorms will continue on Sunday from the central Appalachians into the Northeast to the north of a frontal boundary and area of low pressure moving slowly up and off the East coast. To the south, showers and thunderstorms will continue across Florida ahead of the trailing cold front which pushes through the Sunshine state today and tomorrow. Meanwhile, a west to east oriented surface front dropping southward through the Ohio and Tennessee Valleys and the lower Great Lakes will allow for scattered showers and thunderstorms across those regions today, moving into the Southeast by Monday. For the western half of the nation, scattered showers and storms will spread from the Pacific Northwest, across the northern Intermountain West/Rockies, and into the northern Plains by Monday. Locally enhanced heavier rainfall is possible along the favorable terrain, especially for northern Idaho and northwest Montana where flood watches and advisories have been issued. Much of the Southwest U.S. will be hot and dry underneath upper level ridging, with triple digit heat likely today. Excessive heat warnings are in effect for some locations near the California/Arizona border. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php