Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 AM EDT Mon Jul 10 2017 Valid 12Z Mon Jul 10 2017 - 12Z Wed Jul 12 2017 ...There is a slight risk for severe thunderstorms and heavy rainfall across portions of the Upper Midwest/Ohio Valley... ...There is a slight risk for severe thunderstorms across Montana today and the Upper Mississippi Valley on Tuesday... Hot and dry conditions will persist for across portions of the West through the next few days. Red Flag warnings are in place over much of the Interior Northwest, Snake River Valley and the Great Basin. Nearly half of California has heat advisories and excessive heat warnings in effect. A Pacific front will pass through the Pacific Northwest and Intermountain region by Tuesday. Showers and thunderstorms will develop over parts of the Northern Rockies and the adjacent High Plains and will track eastward toward the Upper Midwest by midweek. A front extending from Southeastern Canada westward to the Great Lakes into the Northern High Plains is forecast to dissipate by this afternoon. A wave of low pressure over the Northern Plains will move eastward to Southeastern Michigan while the associated boundary begins to dissipate by Tuesday. Showers and thunderstorms will advance from the Upper Mississippi Valley southward into the Middle Mississippi Valley and eastward into the Great Lakes and Ohio Valley. Some of these storms will have the potential to become severe and produce periods of heavy rainfall. Please refer to the SPC convective outlooks and the WPC excessive rainfall outlooks for additional information on the risks. In addition, moisture and upper-level energy will trigger showers and thunderstorms over parts of the Great Basin/Southwest into the Central/Southern Rockies through Wednesday morning. Showers and thunderstorms will also be possible along a decaying frontal boundary over parts of the Southern Mid-Atlantic/Southeast westward into the Western Gulf Coast through Tuesday. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php