Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 307 PM EDT Tue Jul 09 2024 Valid 00Z Wed Jul 10 2024 - 00Z Fri Jul 12 2024 ...Post-Tropical Cyclone Beryl to bring heavy rain and flooding to parts of the Midwest, eastern Great Lakes, and Northeast tonight and Wednesday... ...Dangerous heat and record high temperatures to continue for much of the West into Thursday... ...High humidity in the East will support heat indices of 100-110F from the Southeast to the Mid-Atlantic on Wednesday and Major to Extreme HeatRisk... Post-Tropical Cyclone Beryl will continue its northeastward trek into Wednesday, with an associated precipitation shield extending to its northeast ahead of a warm front. Both severe weather and flash flooding are possible through parts of the Midwest/Ohio Valley this evening. Tornadoes are possible with severe weather and heavy rainfall could cause small river and roadway flooding, especially in urban areas. Rainfall totals of 2-4 inches, with locally higher amounts, are expected. On Wednesday, Beryl will continue northeastward through Ohio and into Ontario and rainfall will increase over northern areas of New York into New England. Thunderstorms could be severe in some areas with some tornado potential. The flash flooding threat will be greater over parts of northeastern New York into northern Vermont/New Hampshire, especially in hillier areas. Elsewhere, showers and some thunderstorms are possible over parts of New Mexico, along the Gulf Coast, and into the Southeast/Mid-Atlantic. In the West, the intense heat will continue for at least a few more days, with temperatures well above normal and reaching or exceeding daily record highs over many locations from Mexico to Canada west of the Rockies. Excessive heat warnings or heat advisories are in effect for much of the area outside the high mountains, even including the foothills. Temperatures well into the 100s/110s will be commonplace, resulting in a widespread Major to Extreme HeatRisk. In addition to the record high daily temperatures, the early morning lows are also expected to set records across large portions of the West over the coming two mornings. The multi-day length and record warm overnight temperatures will continue to cause heat stress to anyone without adequate cooling and hydration. Elsewhere, temperatures will be cooler than average along the path of Post-Tropical Cyclone Beryl thanks to overcast skies and rain. Ahead of its path, the East Coast will see another day of warm/hot temperatures well into the 90s from the Mid-Atlantic southward through the Carolinas. The high humidity values will result in heat index values over 100F for many of these areas. This will also promote many record high minimum temperatures that only dip into the mid/upper 70s at night (and near 80 in some urban centers such as Baltimore and Washington, D.C.). Heat advisories are in effect for much of the I-95 corridor between the Appalachians and the coast. By Thursday, temperatures may cool by a couple degrees as the cold front associated with Beryl reaches the East Coast but may stall across the region. This could finally bring some much needed rain to the Mid-Atlantic. Fracasso Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php