Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 AM EDT Mon Jul 30 2018 Valid 12Z Mon Jul 30 2018 - 12Z Wed Aug 1 2018 ...Unsettled weather pattern returns to the eastern U.S. and heat continues to make headlines for the western states... Showers and thunderstorms will be numerous from Texas to the East Coast early this week with a pronounced upper level trough becoming established over the Midwest and the Ohio Valley region. The response to this in the low levels will be deep moisture surging northward over the eastern U.S. through Wednesday, aided by southerly flow on the western edge of the Bermuda high. It will be warm and quite humid with daily chances for rain from the Gulf Coast to New England. Episodes of heavy rain are expected to materialize in this type of weather pattern and periodic instances of flash flooding are possible. Slight risk areas for excessive rainfall cover parts of the Deep South and also the Mid-Atlantic region. Persistent upper level ridging across the western U.S. will lead to mainly dry conditions for the Pacific Northwest and much of the Intermountain West. Temperatures are expected to be above normal for much of this region, with heat advisories and excessive heat warnings in effect across parts of Oregon, Washington, and Idaho. Poor air quality will also be an issue for some of these areas, especially near any active wildfires. Elsewhere across the continental U.S., monsoonal moisture is expected to remain across much of Arizona and New Mexico with scattered thunderstorms developing mainly during the afternoon and evening hours. Pleasant temperatures for this time of year are expected across much of the central and northern plains, and extending eastward to the Great Lakes. D. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php