Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Tue Jul 05 2022 Valid 00Z Wed Jul 06 2022 - 00Z Fri Jul 08 2022 ...Showers and thunderstorms with excessive rainfall and severe weather possible through midweek from the Northern Rockies and High Plains to the Mid Atlantic and Southeast... ...Dangerous heat and humidity to continue from parts of the central and southern Plains to the Mid Atlantic and Southeast... An ongoing severe thunderstorm complex, producing widespread damaging winds across South Dakota will likely persist, with severe weather continuing into southwest Minnesota and northern Iowa this evening before diminishing overnight. This system developed along a slow-moving frontal boundary that is expected to drift south from the northern Plains and Great Lakes into the central Plains, Ohio Valley, and Mid Atlantic over the next couple of days. This front will likely remain a focus for unsettled weather through midweek, with showers and storms developing along it each day. Some of these storms may become strong to severe, with damaging winds, large hail, and flooding rains possible. Severe storms are also likely to develop both tomorrow and Thursday over the northern Rockies and High Plains, where large hail and damaging winds are possible. While cooler temperatures are expected across the northern Plains and Upper Midwest tomorrow, dangerous heat and humidity is expected to persist south of the front. With overnight lows forecast to remain in the 70s in most locations, before heat indices reach into the triple digits once again tomorrow, Heat Advisories and Excessive Heat Warnings cover a broad portion of the central and southern Plains, the mid and lower Mississippi Valley, the lower Ohio and Tennessee valleys, as well as parts of the coastal Mid Atlantic and Southeast. While much of the central and eastern U.S. remains hot, seasonal to below-average temperatures are forecast along the West Coast and into the Great Basin, Southwest, and the central to southern Rockies. Some afternoon and evening showers and storms are possible from eastern Arizona and New Mexico into the southern and central Rockies, continuing the anomalously wet start to the summer across that region. Pereira Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php