Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 346 AM EDT Wed Aug 1 2018 Valid 12Z Wed Aug 1 2018 - 12Z Fri Aug 3 2018 ...Unsettled weather pattern continues the eastern U.S. and heat wave gradually abating across the West... Unsettled weather will continue to be the case for much of the eastern U.S. through Thursday owing to a stalled out frontal boundary from Texas to the Ohio Valley, and a large scale upper level trough extending from the Great Lakes to the Mid South. The response to this in the low levels will be deep moisture surging northward over the eastern U.S., 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. This is especially from the Florida Panhandle and extending across the southern and central Appalachians. 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, but improving compared to the past couple of days. Poor air quality will also be an issue for some of these areas, especially near any active wildfires. For the southwestern 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. D. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php