Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 244 AM EDT Fri May 26 2017 Valid 12Z Fri May 26 2017 - 12Z Sun May 28 2017 ...Severe thunderstorms and locally heavy rain possible from portions of the plains to the Mid-Atlantic through Saturday... ...Warming temperatures expected for the Pacific Northwest through the weekend... A low pressure system moving along the Northeast U.S. coastline will keep much of New England in rain today. As the low pressure area begins to move east of the region this evening, rain will begin to taper off. Farther west, a frontal boundary extending from the central and southern plains to the central Rockies today will result in areas of scattered to numerous showers and thunderstorms. The system will produce accumulating snow at the higher elevations of Wyoming today and tonight. Meanwhile, severe thunderstorms and heavy rain are possible today across portions of the central and southern High Plains. Please refer to products issued by the Storm Prediction Center for further details on the severe weather threat. On Saturday, one wave of low pressure along the front will move into the the Ohio valley and the Mid-Atlantic, bringing scattered showers and thunderstorms to those areas. Farther west, an upper-level disturbance moving from the Rockies into the plains will interact with the front to produce widespread showers and thunderstorms on Saturday from the central and southern plains to the Mid-Mississippi valley. This second round of storms will move into the Ohio valley and the Appalachians Saturday night into early Sunday morning. Severe thunderstorms and heavy rain will once again be possible Saturday and Saturday night. High pressure will expand across the western U.S. into the weekend. This will keep the West Coast dry, with warming temperatures expected. The warmest conditions are expected across the interior Northwest, where temperatures are forecast to rise into the 80s today, perhaps approaching 90 on Saturday, 10 to 20 degrees above average. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php