A storm, moving at a snail's pace, will produce heavy, flooding rain from the Ohio Valley into New England Friday through next Monday. In many areas, the storm will be responsible for producing the amount of rain typically observed during an entire month of March in just a few days.

A heavy rain-making storm will organize over the Midwest Friday before arriving in New England by the latter half of the weekend.

Many rivers and streams are already swollen or exceeding flood stage from southern Illinois to Indiana and Ohio.

In the flood weary city of Findlay, Ohio, residents are just recovering from flooding earlier this week.

"Every time it rains I get nervous," Sharon Hill told TheCourier.com in Findlay, Ohio. With more rain in the forecast for Ohio, a mutual feeling may be felt across other cities.

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© AccuWeather.com Facebook Fan Ryan S.Flooded roadways in Lima, Ohio earlier in the week. Lima is located about 30 miles southwest of Findlay, Ohio.

The fire department rescued 46 people overnight Monday and helped evacuate 60, reported TheCourier.com.

Widespread rain will begin to fall across cities mainly from Springfield, Mo. to Chicago, to Cleveland on Friday.

The rain is then forecast to become heavy Friday night into Saturday across the Ohio and Tennessee valleys. This heavy rain will then slowly move into the mid-Atlantic and Northeast for the latter half of the weekend.

A highway of southerly winds aloft will transport tropical air into the storm. Introducing tropical air into a storm is similar to throwing a match into a can of gasoline; the tropical air will be the main catalyst for the heavy rain.

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"Rainfall should exceed one inch through the end of the weekend over the majority of the Ohio Valley and Northeast with this storm," said Expert Senior Meteorologist Dave Dombek.

In fact, rainfall totals from this storm may exceed what normally falls during the entire month of March in some areas.

As heavy rain moves into the Northeast this weekend, a heavy snowpack throughout much of New England may only exacerbate the runoff.

If there is any positive aspect of the forecast, very warm air should be missing over northern New England while the heaviest rain falls. This lack of warm air may allow for the rain to end as a period of snow across the region.

The upcoming flood threat may be just the beginning of wild weather across the U.S. this spring.