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McHenry County under flood warning until Wednesday morning

The National Weather Service has issued a flood watch and flood warning for residents in northeastern Illinois, including McHenry County.
The National Weather Service has issued a flood watch and flood warning for residents in northeastern Illinois, including McHenry County.

CRYSTAL LAKE – The National Weather Service issued a flood warning through Wednesday morning for residents in northeastern Illinois, including McHenry County.

The flood warning will remain in effect until 10:45 a.m. Wednesday, according to the service. A flood watch for the same area was in effect through 6 p.m. Tuesday.

The warning affected portions of northern and northeastern Illinois, including DeKalb, Kane, Lake and McHenry counties.

Doppler radar and trained weather spotters observed heavy rainfall of 2 to 4 inches Tuesday morning across the warned area, with widespread flooding likely occurring, according to the service. An estimated 1 to 3 inches fell Tuesday afternoon, with multiple rounds of showers and thunderstorms expected overnight, likely worsening the ongoing flooding.

Because the ground remains frozen, the service said, much of the rain will result in rapid runoff. Rivers and streams likely will continue to rise, which might result in additional flooding.

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