Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 357 PM EDT Mon Jun 27 2016 Valid 00Z Tue Jun 28 2016 - 00Z Thu Jun 30 2016 ...Flash flooding possible for the central and southern Appalachians and surrounding foothills... ...Severe thunderstorms possible for the central High Plains... ...Mostly dry conditions with above average temperatures are expected to continue for the West... A cold front will bring scattered to numerous showers and thunderstorms across the Northeast to the South, lower Mississippi Valley and the southern Plains. Thunderstorms have already broken out all across these regions, and can be expected to continue as the front progresses south and east. Flash flooding could pose a problem for the central Appalachians in addition to the Tennessee Valley overnight Monday and into Tuesday morning. The greatest risk is over the higher elevations of West Virginia/Virginia, where this area has already experienced previous heavy rainfall. On Tuesday, precipitation will move along the Northeast and Mid-Atlantic coastline by the morning, while showers and thunderstorms can be expected through the Plains and South. On Wednesday, as the front sags southward, showers and thunderstorms will be confined to the Gulf Coast. Higher coverage of these thunderstorms will occur during the afternoon with daytime heating. Meanwhile, Florida will experience the typical diurnally driven sea breeze convection during the afternoon and evening over the next few days. An upper level disturbance will traverse southward across the High Plains on Tuesday night and into Wednesday morning. This will cause a cluster of thunderstorms to travel southeastward across Nebraska and into Kansas. These storms come with a risk of severe thunderstorms along with the possibility of flash flooding. Monsoonal moisture will fire off isolated to scattered thunderstorms across the Southwest--with most of the activity occurring during the late afternoon/evening time frame. High temperatures on Tuesday will continue to be above average for the Great Basin and Intermountain West, with some areas reaching 100 degrees. Fanning Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php