Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 PM EDT Mon Apr 30 2018 Valid 00Z Tue May 01 2018 - 00Z Thu May 03 2018 ...Snowfall accumulations possible in the northern Rockies... ...Severe thunderstorms expected across the Plains/Midwest through midweek... ...Heavy rain for eastern Nebraska/southwest Iowa Tuesday into early Wednesday... Valley rain and mountain snow is expected for portions of the Intermountain West, Great Basin and the Northern/Central Rockies over the next few days as an upper-level system shifts through the Southwest. Snow will be heavy at times, especially across the highest terrain of southwest Montana, western Wyoming, and southwest Colorado. Scattered to widespread showers and thunderstorms will develop ahead of this system over the adjacent High Plains and move east toward the Midwest/Central Plains by midweek. The Storm Prediction Center has highlighted a marginal to enhanced risk for severe weather for central Plains and the Midwest. As a frontal wave develops in northern Kansas, heavy rain is anticipated across eastern Nebraska into southwest Iowa Tuesday afternoon into Wednesday morning, where a slight risk of excessive rainfall is possible. On Wednesday, the severe weather threat edges southward into Kansas and Oklahoma near the wave of low pressure and a dryline to its south. Much of the central U.S. will have warmer than seasonal normal temperatures going into early May - with afternoon highs approaching 10 to 15 degrees warmer. The warm, dry, and windy conditions will allow for an elevated to critical fire weather threat near New Mexico through Tuesday with the southern High Plains remaining at risk into Wednesday. Widespread red flag warnings are in effect across both of these regions. High Pressure building across the Southeast and Atlantic will help temperatures warm up across the Northeast Tuesday and Wednesday. A lingering surface low over New England will continue to support scattered showers and overnight snow showers to parts of the Northeast and the Central Appalachians. An elevated fire weather risk from the West Virginia spine to Del-Mar-VA and southern New Jersey due to low dewpoints and a gusty northwest wind remains until this evening. Campbell/Roth Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php