Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 410 PM EDT Mon Jul 27 2020 Valid 00Z Tue Jul 28 2020 - 00Z Thu Jul 30 2020 ...Heavy Rainfall/flash flooding possible for parts of the Rockies, Plains, & Midwest over the next few days... ...Critical Risk for Fire Weather across portions of northern California and Oregon Monday into Tuesday... ...Cooling trend in the Plains, becoming hotter in the Northwest, staying hot in the Northeast... A Slight Risk for excessive rainfall and localized flooding concerns exist for the Central Plains on Tuesday and from the Northern High Plains into the Midwest on Wednesday; flash flood watches are posted for sections of this region. During this time monsoonal moisture will continue to advect northward into the Southwest and round the ridge top into the Plains/Midwest. A Canadian cyclone and its trailing front will slowing move through the Plains and Great Lakes region. Showers and thunderstorms will fire up along and ahead of this feature, promoting the expected heavy rainfall. Around 2 inches of rain is possible for parts of Oklahoma through Wednesday. Heavy rains will linger along the central Gulf coast for another couple days as an upper level disturbance continues to draw Gulf moisture into the region. Some heavy rainfall is possible from outer bands of the weakening tropical system named Hanna. Cooler temperatures will move into the central U.S. with the aforementioned cold front, which will bring a pleasant reprieve from the recent hot conditions. Hot and humid conditions will persist into midweek with heat indices in the Northeast reaching at or above 100 degrees on Tuesday afternoon; heat advisories are in effect. Record highs are possible across portions of the Mid-Atlantic States and Southern New England as temperatures soar well into the 90s through Tuesday before a cold front moves through, returning temperatures back closer to late July norms. Lows will be warm enough to potentially break records tonight across the Northeast and Mid-Atlantic. Across the the Northwest, temperatures will warm up again reaching the 90s to near triple digits before a Pacific cold front moves into the area Tuesday night, while interior portions of the Northwest experience warm temperatures through Thursday; heat advisories are in effect. On Tuesday, the Storm Prediction Center has concerns that the heat and thunderstorms across far northern California and portions of Oregon would lead to a critical risk for fire weather due to their associated lightning and minimal expected rainfall. Kebede/Roth Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php