For the month of October, 6.51″ of rain fell in Carol Stream. This was 3.84″ above the normal total of 2.67″, or 244% from normal. Rain was observed on 23 of 31 days.
Fortunately, long-term forecasts call for less rain through mid-November. In addition, the large amount of rain fell gradually, causing only limited flooding problems.
Very heavy rain leading to flooding, severe storms and strong winds may occur Thursday night into Friday, according to the National Weather Service.
The ground continues to be very saturated because of rains that have fallen over the past 6 days, totaling 2.42″. A heavy rain event will lead to flooding.
The level of Lake George has fallen since Saturday, and is no longer flowing into the northern detention basin.
As of 10:30 this morning, the 4-day total rain total had reached 2.04″. Rain will continue through this coming week, causing another 1 to 2 inches to fall on the area. This may cause minor flooding.
Lake George is currently overflowing into northern-most dentention pond. Some benches normally along the shoreline of the lake are partially underwater.
A 0.62″ rainfall yesterday and through the night broke a very dry streak of 0.04″ of rain through the first 19 days of September. The brings the September rainfall total to 0.66″.
Fortunately, August 2009 was a wet month in Carol Stream. A total of 5.01″ of rain fell in August, 1.38″ more than the monthly average of 3.63″ (+38%).
As of 7:30 pm, a total of 1.62″ has fallen in Carol Stream. 0.03″ fell between 8:00 this morning and 7:00 tonight. This amounted to an 11-hour break from rain. The following is a status of the flood-control structures in the area:
- Lake George (the main retention pond in Armstrong Park) is over bankfull
- Klein Creek is about 75% full
- West Branch of the DuPage River at Schick Road is almost over its banks
- Area retention ponds are largely barely full
A very, very slow moving low-pressure impulse will move into the Carol Stream area tonight and tomorrow, raising the possibility of widespread flooding in the region. A Flash Flood Watch remains in effect through tomorrow afternoon.
After showers and scattered rain today, the ground remains saturated after nearly 1 3/4″ of rain. A further 3-4″ of rain may be possible overnight tonight, resulting in flooding. The risk of flooding is considerably greater north of the Elgin-O’Hare Expressway and west of Illinois 53, where widespread rain totals of 2-3″ have already occurred. However, tonight’s heavy rainfall threat is likely to be more widespread than today’s heavy rainfall.
As of 8:10 this morning, 1.59″ had fallen in the last two days, including 0.97″ during the day and overnight yesterday.
1-3″ of rain is expected to fall today, although currently most of the rain is falling north of the Lake (IL)-Cook county line.
As of 2:45 PM today, a Flash Flood Watch is in effect for the entire area.
Waves of rain falling on mostly saturated ground will affect the area through Friday, August 28. 1-2 inches of rain is likely, with isolated totals of 4-5 inches possible.
This amount of rain would cause partial flooding of low-lying areas in Carol Stream.
A formerly dry August (0.67″ through August 15) has given way to a particularly wet late August, including 0.62″ overnight.
2.86″ of rain has now fallen since August 15, and 3.53″ has fallen during the month. Rain in the next few days should push the monthly tally over the 3.63″ average.
Up to two inches of rain is possible in showers and thunderstorms over the next two days.
On the heels of 1.50″ of rain from the storm system that came through on Monday, another large system is expected to drop another 1-2″ of rain on the area.
According to the last forecasts from the National Weather Service, it will only take about 2-3″ of rain to cause flash flooding. As of yet, the Hydrometeorological Prediction Center has not outlooked the area for a chance of flash flooding.
