Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 401 AM EDT Thu Jun 01 2017 Valid 12Z Thu Jun 01 2017 - 12Z Sat Jun 03 2017 ...An upper-level trough will keep temperatures cooler than normal in the Northeast... ...Clouds and scattered thunderstorms will suppress daytime temperatures in the South... ...Above average temperatures expected for the northern Great Basin and northern Rockies... The upper-level pattern will favor a trough lingering in the northeastern U.S. as a progressive trough over the Pacific Northwest attempts to intrude an amplified ridge axis along the High Plains. Temperatures over the Northeast will be cooler than normal under the upper-level trough along with widely scattered showers into early Saturday. Farther to the west and southwest, the chance of thunderstorms will increase across the northern mid-Atlantic, Ohio Valley and the Midwest toward the weekend as a warm front approaches from the southwest. The truly warm and humid air will continue to stay south of the front across the Deep South and into the central and southern Plains. The Gulf Coast will likely see the highest chance of thunderstorms as moisture attempts to move up from the deep tropics. Scattered thunderstorms are also likely over the southern High Plains where a lingering smaller-scale upper-level trough provides the instability. Meanwhile, the recent spell of hot weather in the Pacific Northwest will move into the northern Plains by the weekend as an upper-level ridge builds eastward ahead of a cold front. The Pacific Northwest will cool down as an upper-level trough moves in behind the front. But temperatures will begin the recover during the weekend. Meanwhile, scattered thunderstorms can be expected to move across the northern and central Plains on Saturday ahead of the advancing cold front. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php