Heavy Rains on August 12-15

As forecasted by the National Weather Service, heavy rains have fallen across Illinois since Friday. Here are the totals by day and for the three days combined. More rain is expected today and tomorrow (last map). Friday’s rainfall is shown on the 24-hour totals for the morning of August 13, etc. We have had a stationary front parked over Illinois since Friday, which is usually a key ingredient for getting significant rainfall amount.

Here is the set of maps showing the rainfall totals for each day, using rain-gage calibrated rainfall totals. It provides a higher level of details with fairly good accuracy. The downside is that the color scale changes slightly from map to map.

Rainfall totals for the morning of August 13, 2016

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Morning of August 13, 2016.

Rainfall totals for the morning of August 14, 2016

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Morning of August 14, 2016.

Rainfall totals for the morning of August 15, 2016

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Morning of August 15, 2016.

Rainfall totals for the 7-day period ending August 15

There are some areas in southern Illinois with an estimated 5 to 8 inches of rain over the last 7 days with more rain on the way. Two CoCoRaHS stations in southern Illinois reported over 7 inches of rain since Friday. The station near West Frankfort (IL-FK-5) reported 7.90 inches and the station near Mt. Vernon (IL-JF-4) reported 7.08 inches.

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Here is the forecast of potential rainfall amounts over the next 3 days

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Forecast of potential rainfall over the next three days.
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