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  • Tim McGill

Winds Whip Up Big Waves & Keep It Cool

Gusty northeast winds off the lake will keep us cooler than average for the second day in a row. The last time we had two days in a row below average was the beginning of August. The last time we had back to back days with highs this cool was the middle of May. Average highs this time of the year are in the upper 70s. We will settle for lower to middle 60s today. Some spots well northwest of the city might fail to get out of the upper 50s.

The northeast winds will not only keep us cool they will whip up some big waves again today along Lake Michigan's shoreline. Waves could build to near ten feet. Those waves along with strong rip currents has prompted the National Weather Service to continue the Beach Hazards Statement through tomorrow evening. A Lakeshore Flood Advisory continues too for Kenosha county in Wisconsin along with Lake and Cook counties in Illinois through 4 pm Thursday.

The National Weather Service warns "the large waves combined with record high lake levels could exacerbate already significant beach and shoreline erosion sustained over the past several months. Typical flood prone locations will likely experience flooding, including portions of the Chicago Bike Path. Onlookers may be swept into the lake by the large waves".

This cool pattern may be weakening a bit as we get into the middle of the month. The long range forecasts aren't looking as blue. Both the 6-10 day and the 8-14 day temperature probability forecasts still have us outlooked for below average temperatures overall from September 14th through the 22nd. The probabilities this will happen have dropped from 70-90% down to 30-40% though. The cool signal from the models isn't as strong as it once was.

Some welcome rain fell again yesterday to continue to put a dent in the drought. Five of the first 8 days of September have seen some rain. Yesterday .64" fell at O'Hare bringing the monthly total to 1.71". O'Hare is still down 3.54" below average since July 1st.

Today's rain will quickly taper to spotty showers with most of us dry this afternoon. The next round of rain is most likely late Saturday into Saturday night.

The long range precipitation probability forecasts continue to hint at a return to a dry pattern for the middle of the month. Both the 6-10 day and 8-14 day forecasts have us outlooked for beow average rainfall.

Cloudy & cool today and tomorrow but hang in there! Some superb September weather is on the way for early next week with sunshine & 70s.

Here is my 7 day forecast:

Beach hazards st atement until 7 PM Thursday

Lakeshore flood advisory until 4 PM Thursday

Today: Cloudy, cool & breezy, spotty showers High: 65

Thursday: Mostly cloudy, breezy Low: 58 High: 68

Friday: Partly to mostly cloudy Low: 58 High: 72

Saturday: Partly to mostly cloudy, sct. showers & thunderstorms Low: 59 High: 76

Sunday: Partly to mostly sunny Low: 61 High: 76

Monday: Mostly sunny Low: 57 High: 73

Tuesday: Mostly sunny Low: 58 High: 78



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