Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 238 AM EDT Mon Aug 22 2016 Valid 12Z Mon Aug 22 2016 - 12Z Wed Aug 24 2016 ...Below average temperatures expected from the Ohio valley to the Northeast... ...Cooler temperatures expected today for the Pacific Northwest with temperatures rising again by midweek... ...Stationary front to keep scattered showers and storms possible across the southern states... A cold front moving off the Northeast and Mid-Atlantic coast this morning will bring an end to morning rain for New England, and usher a cooler air and drier air mass into the region. High temperatures today from the Ohio valley to the Mid-Atlantic and Northeast are forecast to be 5 to 10 degrees below average, providing relief for many areas that have experienced an extended period of hot and humid weather recently. High pressure will remain over the Eastern Seaboard through midweek, keeping conditions dry through Wednesday, with temperatures slowly rising back to near or slightly above normal. Farther south, the trailing end of the frontal boundary moving off the East Coast will remain stationary across the Southeast and lower Mississippi valley as it slowly weakens through mid-week. This will keep scattered showers and thunderstorms a daily occurrence across these areas. Farther west, monsoonal moisture will keep scattered showers and storms in the forecast for the southwestern U.S. as well. A cold front moving into the northwestern U.S. has brought an end to the extreme heat seen in recent days. Temperatures today are forecast to be 5 to 10 degrees below average for much of the Northwest. High pressure aloft will attempt to build partially back into the Northwest by mid-week, and temperatures will rise once again as a result. By Wednesday temperatures are expected to be 5 to 15 degrees above average across the Pacific Northwest. The cold front moving into the Northwest today will remain mostly devoid of any precipitation until it reaches the central and northern plains on Tuesday, where showers and thunderstorms are expected to develop. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php