Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 408 AM EDT Sun Jun 13 2021 Valid 12Z Sun Jun 13 2021 - 12Z Tue Jun 15 2021 ...Thunderstorms across the High Plains and the eastern U.S. could be severe today especially around the Central Appalachians... ...Building heat as well as potential fire danger is forecast for much of the West... In the eastern U.S., a couple of rounds of scattered thunderstorms are expected over the next couple of days as moisture streams in ahead of frontal systems and an upper-level trough coming into the Great Lakes region. Today, the most widespread thunderstorms are likely in the Central Appalachians, and a Slight Risk of severe weather is in place there, with the main threat being high winds. As some storms produce heavy rain, isolated flash flooding is possible there as well, which may also affect portions of the Ohio Valley. The Midwest could also see strong storms today. Storms should shift a bit into the Northeast by Monday, but generally stay below severe levels, though once again isolated flash flooding cannot be ruled out. Farther south, convergence and moist Gulf air could also create scattered thunderstorms along the Gulf Coast and in the Southeast over the next couple of days. Northern Florida as well as southeastern Georgia may see some locally heavy rainfall causing flash flooding from these storms. The High Plains should also see some isolated thunderstorms today and less so on Monday. Today into tonight, a few strong to severe thunderstorms are possible, with gusty winds and hail. Additionally, isolated flash flooding is possible in the Central High Plains, and Marginal Risks of excessive rainfall and severe weather are in place. Meanwhile in the West, the main story will be heat building through this week as an upper-level ridge expands. Excessive Heat Watches and Warnings and Heat Advisories are in place especially for Monday onward for portions of California, the Desert Southwest, and the Central Great Basin. Hot temperatures in the 90s and even into the 100s are forecast farther north across the Northern Great Basin to Northern Plains as well, likely peaking on Tuesday. Record high temperatures are expected to be widespread across the Desert Southwest, Intermountain West, and Rockies over the next several days. Given the heat and dry conditions, an Elevated Risk of fire danger is in place in the Great Basin today, with a Critical Risk for portions of Nevada and Utah on Monday. The exception to the Western heat will be the Pacific Northwest and northern California, which should see temperatures near or a bit cooler than normal along with rainy weather as a cold front comes through the area. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php