A couple of strong winter storm systems are crossing the country. Through Wednesday, heavy snow and ice to the Ohio Valley into the Mid-Atlantic, ice for the Central Appalachians, and heavy snow and ice to the Central Plains. Heavy rain will result in flash and river flooding in the Lower Mississippi and Tennessee Valleys. Canada remain cold to the West where the heaviest snow will be in the mountains but also some heavy snowfall east focused on the Maritimes. Later this week, another very wet setup for the West arrives.
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The last week of July and start of August brings no shortage of impactful weather across North America. Severe thunderstorms, flash flooding, and prolonged dangerous heat are the major concerns through the first few days of August. The Plains and Midwest face several rounds of thunderstorms, while the Southwest continues to battle flash flood threats from monsoonal rains. A late-week cold front shifts the storm focus to the Carolinas and Southeast, and finally begins to erode the long-standing heat wave gripping the central and eastern U.S.