Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 401 PM EDT Sat May 29 2021 Valid 00Z Sun May 30 2021 - 00Z Tue Jun 01 2021 ...Additional rounds of severe weather and flash flooding possible across the central and southern Plains through the weekend... ...Below average temperatures found throughout much of the central and eastern United States, while heat builds in the West... Unsettled weather is expected to continue across portions of the central and eastern U.S. through the remainder of the weekend, with hazardous weather conditions likely across parts of central and southern High Plains. Thunderstorms are forecast to develop this afternoon along the central and southern High Plains. Some of these storms may become strong to severe, with scattered large hail, brief tornadoes, and isolated severe wind gusts possible -- especially across portions of eastern Colorado, eastern New Mexico, and the western Texas and Oklahoma panhandles. Heavy rainfall, leading to localized flash flooding is also a concern, particularly across parts of eastern Colorado, western Kansas, the Oklahoma and far northern Texas panhandles, as well as far northeastern New Mexico. Storms are expected to diminish overnight into early Sunday, before redeveloping during the afternoon, with severe weather becoming more likely across a broader portion of the southern High Plains. Widely scattered severe thunderstorms are possible across eastern New Mexico into western Texas, with large to very large hail and damaging wind gusts expected to be the primary hazards. Heavy rainfall leading to localized flash flooding is also possible -- especially from Northwest Texas and the Texas Panhandle to western Oklahoma. Showers and storms will likely develop once again on Monday, with heavy to excessive rainfall possible across portions of Northwest Texas into southwestern Oklahoma. Severe thunderstorms will also be possible once again, but with the threat expected to be more confined to portions of southwestern Texas. With showers and thunderstorms likely all three days, temperatures are forecast to seasonal to below-normal across much of the central and southern Plains through Memorial Day. Rainy and cool conditions are also expected to continue across the Mid-Atlantic and Northeast. An area of low pressure developing along the Mid-Atlantic coast is forecast to bring additional rains to the Mid-Atlantic and Northeast, as it tracks north along the coast on Sunday. While high pressure is expected to bring dry conditions back into the Mid-Atlantic on Monday, wet conditions are expected to continue across portions of the Northeast as the low tracks along the New England coast into Atlantic Canada. While much of the Southeast can expect dry conditions on Sunday and Monday, showers and thunderstorms are forecast both days along and ahead of cold front settling into central Florida by the latter half of the weekend. In contrast with the central and eastern U.S., dry conditions are expected across the West, with well-above average temperatures building across the region early next week. Excessive Heat Warnings and Watches, and Heat Advisories have been issued for parts of southwestern Oregon, in addition to much of interior Northern California, and the Sacramento Valley and San Joaquin valley for early next. Highs are forecast to reach the upper-90s and triple digits beginning Sunday. Temperatures are forecast to climb further on Monday, with record-breaking highs expected for portions of the Sacramento and San Joaquin valleys. Pereira Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php