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 As the system progresses, areas of showers, heavy rain, and scattered to numerous thunderstorms will develop along and ahead of an associated warm front that will reach from the Great Lakes into the
lower Northeast and Mid-Atlantic. Meanwhile, additional showers, periods of heavy rain, and thunderstorms will continue along and ahead of the associated cold front as it extends southwestward from the low through the
southern Plains with waves of low pressure. There is a moderate risk of severe thunderstorm development from Ohio through the
lower Northeast, while areas from the upper Great Lakes and the
mid-Mississippi Valley northeastward to southern New England are at slight
risk for severe weather development. The primary concern with storms in
these areas is a significant widespread damaging wind event or derecho by the afternoon, while tornado development may occur near the warm front in parts of New York and southern New England. Residents in the Midwest and Northeast are encouraged to monitor their local conditions on Thursday and take proper precautions against inclement weather activity.
Elsewhere, hot and humid conditions coupled with continued instability will maintain chances of showers and thunderstorms along the eastern and central Gulf Coast. Meanwhile, monsoonal moisture and daytime heating will kick up areas of showers and thunderstorms in the
central and southern Rockies through the afternoon and evening.
Temperatures in the Lower 48 states Wednesday have ranged from a morning low of 35 degrees at Stanley, Idaho, to a high of 107 degrees at Olney-Noble.
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