Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 242 AM EDT Tue Jul 25 2017 Valid 12Z Tue Jul 25 2017 - 12Z Thu Jul 27 2017 ...Severe weather and flash flooding possible across the northern Plains to the upper Midwest on Tuesday and Wednesday... ...Localized flooding will be a concern for the Southwest and southern and central Rockies for the next few days... A cold front moving across the northern tier will be the focus for showers and thunderstorm for Tuesday and Wednesday. Heat and humidity building across the northern Plains will interact with the cold front to generate strong to severe storms from South Dakota to northwest Wisconsin on Tuesday. Locally heavy rainfall from these storms could cause some concern for flash flooding across the region. Moisture will continue to build ahead of the frontal boundary as it pushes south and east across the central U.S. on Wednesday. This should fuel another round of strong to severe storms that could be more widespread across the upper Midwest. Heavy rainfall will accompany these storms with flash flood potential across Iowa and adjacent states to the east. Widespread showers and thunderstorms are expected to continue across the Southwest and Rockies on Tuesday. Locally heavy rainfall could cause flash flooding from the central Rockies to parts of the Great Basin on Tuesday. The activity should begin to shift to the north and east as the upper level pattern lifts toward the northern Plains. The threat for flash flooding will be more focused over the central and southern Rockies for Wednesday. A day of cooler temperatures is expected across the Northeast and northern Mid Atlantic on Tuesday. This should be especially refreshing after the recent string of hot weather. High temperatures could struggle to break 70 degrees across New England. Hot weather is expected across the central U.S. with temperatures expected to peak near 100 degrees across some of the central and northern Plains. Krekeler Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php