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During the next several days, hot, dry weather will persist in most areas west of the Rockies. Late in the week, however, markedly cooler air will overspread the Northwest. Farther east, a low-pressure system will move into eastern Canada, but showers along a trailing cold front will linger into Thursday across the South. Late in the week, a new cold front will traverse the northern Plains, Midwest, and Northeast, generating scattered to widespread showers and locally heavy to severe thunderstorms.

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