Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 419 PM EDT Wed Jul 12 2017 Valid 00Z Thu Jul 13 2017 - 00Z Sat Jul 15 2017 ...Severe weather with areas of heavy rainfall expected from the central Plains to the lower Great Lakes... ...Hot and humid weather from the mid-Atlantic southward but hot and dry over much of the West... A slow-moving frontal boundary will continue to be the focus for numerous showers and thunderstorms from across the central Plains eastward across the Midwest, the lower Great Lakes, and into New England through Friday. A few areas may have storms moving slowly, or developing over the same area, which may lead to heavy rainfall and flash flooding. As the main low pressure center moves across the Great lakes on Thursday, the trailing cold front will slowly moves southward into the central Plains, bringing cooler and drier air into the northern Plains. Ahead of the front, however, showers and thunderstorms will spread eastward into the Ohio Valley on Thursday, followed by the mid-Atlantic on Friday. Cloud covers will keep very sultry conditions even into the nighttime hours across the mid-Atlantic. In contrast, cool conditions will persist across northern New England with some passing rain showers on Thursday. Meanwhile, summer heat and humidity are expected to continue across the entire southeastern U.S. and into the southern Plains. The remnants of tropical depression Four is forecast to move across Florida on Thursday, which could touch off some additional areas of heavy downpours across the Sunshine State. The western U.S. continues to be under the influence of a persistent warm high pressure system aloft. This will keep temperatures above normal for the next few days. Areas from the northern Rockies into the northern High Plains will continue to see temperatures soaring well into the 90's, even into the lower 100's through Friday and beyond. Farther to the south, diurnally driven monsoonal moisture will continue to bring scattered showers and thunderstorms to portions of the Southwest and into the central and southern Rockies. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php