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  • Tim McGill

Dry Stretch Through End Of Week Then Warmer Weekend

The May showers just keep on coming. We added another quarter inch of rain to the record amount of rainfall for the the month of May since we broke the record on Sunday. Eight and a half inches of rain so far this month and anything additional over the next eleven days just adds to the record.


Here are the top three wettest Mays on record:

  1. May 2020 8.50"

  2. May 2019 8.25"

  3. May 2018 8.21"

We will get a much deserved break from rainfall for the next three days. After that we enter a period of more unsettled weather with at least some scattered showers and thunderstorms starting later Sunday and continuing well into next week.


The GFS model meteogram for O'Hare shows periods of "convective" weather starting late in the weekend and continuing through at least Thursday next week. Convection in weather terms basically means thunderstorms. The green bars below denote periods of rainfall and their height indicates how much rain will fall. The red bars within them indicates thunderstorms possible during those periods.




A lakeshore flood advisory continues until 9 pm tonight. Winds will run along the length of Lake Michigan out of the north and northeast to focus bigger waves today along our shoreline. Those winds combined with already elevated lake levels will present some problems.


The National Weather Service highlights those issues in their advisory:


* LAKESHORE FLOODING...Elevated water levels may lead to minor lakeshore flooding through early evening, even in the absence of higher waves, due to a persistent surge of one half foot to one foot. * TIMING...Through this evening. * IMPACTS...This event will not result in significant shoreline erosion, however the increased surge may result in the inundation of river mouths, inlets, marinas, and ports. In addition, water has been reported on portions of the Chicago lakefront bike path, though this threat will ease today as waves subside.




Now let's talk temperatures...


We will be nearly 10° below average today with highs in the lower 60s but cooler along the lakefront. The northeast breeze off the lake will keep it cooler lakeside with highs only in the middle 50s.



After today it is onward and upward for temperatures. 70s by Friday are expected and near 80° by Saturday and then into the 80s for Sunday



GFS forecast highs for Saturday show 70s surging northward into southern Wisconsin. A south/southeast wind will help boost those high temperatures above average.

The GFS forecast for highs on Sunday show at least lower to middle 80s here. If these forecasts verify, this will be not only the warmest weekend of the year but the warmest in nearly 9 months.


Here is my 7 day forecast: Today: Partly to mostly sunny High: 64 (55 Lakefront) Thursday: Partly to mostly sunny Low: 53 High: 66 (59 Lakefront) Friday: Sun & cloud mix, milder Low: 55 High: 72 (66 Lakefront) Saturday: Sun & cloud mix, sct. shower/t-storm possible late Low: 58 High: 79 ( 72 Lakefront) Sunday: Sun & cloud mix, sct. showers/t-storms Low: 61 High: 85 (81 Lakefront) Monday: Partly/mostly cloudy, sct. showers & t-storms Low: 63 High: 83 (78 Lakefront)


Tuesday: Partly/mostly cloudy, sct. shower/t-storm possible Low: 62 High: 80 (74 Lakefront)

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