Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Wed Jun 26 2019 Valid 00Z Thu Jun 27 2019 - 00Z Sat Jun 29 2019 ...Best chance of thunderstorms expected across the Northern Tier during the next couple of days... A relatively quiet weather pattern is expected to continue across much of the country during this first week of summer. Nevertheless, a slow-moving frontal boundary will be the focus for showers and thunderstorms to move generally from the interior Pacific Northwest into the northern Plains toward the upper Midwest over the next couple of days. Some of these thunderstorms could be severe, especially over northern Montana on Thursday as a low pressure center is forecast to form along the frontal boundary. The associated cold upper-level trough will slowly edge its way across the northwestern U.S. during the next few days, pushing a cold front very slowly eastward across the Great Basin and the northern Rockies. Cool and damp conditions will prevail across the Pacific Northwest. In fact, the higher elevations of the Cascades and the Intermountain region will be cold enough to support snow in the mornings of Thursday and Friday. Meanwhile, summer heat and humidity will prevail from the central Plains eastward to the East Coast, where afternoon high temperatures are expected to reach the 90's. As a high pressure system in the upper-level expands across the region, thunderstorms that do form will be isolated to scattered in nature. Nevertheless, locally heavy rain and isolated flash flooding cannot be ruled out with these storms. Some scattered summertime thunderstorms are also expected across the Deep South for the next few days. A trough of low pressure with a possible circulation center could form over Florida near the tail end of a stationary front on Thursday. This feature is forecast to track westward along the eastern Gulf Coast region, where locally enhanced rainfall is possible through Friday. This will lead to slightly cooler temperatures in Florida on Thursday and Friday after near record-setting heat today. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php