Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 328 PM EDT Wed Aug 09 2017 Valid 00Z Thu Aug 10 2017 - 00Z Sat Aug 12 2017 ...Showers and thunderstorms expected throughout the Southeast... ...Precipitation to develop along the front from the Great Lakes to Ohio Valley... ...Thunderstorms expected to develop in the central Plains with heavy rainfall possible... A stationary boundary lingering along the Gulf Coast will slowly lift northward as a warm front through the Southeast over the next few days. With return flow off the Gulf of Mexico transporting very moist air northward, scattered showers and thunderstorms are expected across the region. Even with the warm front lifting north temperatures are expected to be average to below average with cloud cover and rainfall limiting heating. A surface low moving across the upper Midwest will bring showers and thunderstorms to the region. Surface temperatures ahead of the cold front are expected to be average to slightly below average which should limit the thunderstorm potential. However, enhanced upper level support will deliver a period of moderate to heavy rain to the region. The passage of the cold front will bring with it a period of below normal temperatures. On the southwestern flank of the cold front trailing the main surface low across the Great Lakes, showers and thunderstorms are expected across the central Plains. A weak warm front lifting north across the Southeast will allow for moisture and heat to build across the central and southern Plains. The arrival of the cold front should spark showers and thunderstorms with the potential for heavy rainfall and flash flooding across parts of the central Plains. In the Pacific Northwest, above normal temperatures and dry weather continue. Interior Oregon, Washington, and northern Idaho will see temperatures in the upper 90s to low 100s through the short range period. The I-5 corridor will also see a continuation of above normal temperatures though not as anomalous as the interior Pacific Northwest. Krekeler Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php