Thunderstorms possible Tuesday night after area hits 90

It’s steamy! Tuesday afternoon is hosting the hottest, wettest Chicago-area air mass to date in 2022. It’s also the first 70-degree+ dew point since last September.

New record high temperatures appear within reach.

Thunderstorms are possible Tuesday night, moving into part of the area from Wisconsin with lake winds to cool the area (especially lakeside counties) temporarily after they wake up; Warmth and humidity will recover by the end of this week.

It was the first afternoon of 2022 that qualifies as “hot, humid,” high temperatures hit 90, and the dense dew point — the dew point that provides a measure of humidity in the atmosphere — peaked at 70 degrees.

It’s been less than eight months since such a temperature/dew point combination was observed in Chicago. The last official 90 degree temperature observed in the city was a temperature of 92 degrees on August 28 of last year.

A temperature of 90 will surpass the 2011 record on May 10 – and that looks within reach. Anything higher than 90 degrees would set a new record high for May 10. And anything higher than 91 degrees would represent the hottest temperature that occurred early in Chicago in 42 years from the year. 1980.

Probability of severe weather mode – i.e. will it come like wind, heavy hail or even tornado??

Possible storm on Tuesday night

The storm that broke out in Wisconsin could then make landfall in parts of the Chicago area Tuesday night. Not everyone will see them, but where they do occur – especially in northern counties along the Wisconsin line – strong winds, hail and even an isolated tornado can spin up.

Interactive Radar: Watch Showers & Storms here

The closest we’re seeing is from 10pm CST Tuesday to 3am Wednesday. Thankfully, this isn’t the hottest period (heat helps t-storms) – but it’s still a period in which at least some active, possibly severe, thunderstorms can combine. together.

While the chances of severe weather Tuesday night are less limited than some setups are, those chances are certainly not zero. The NWS Storm Prediction Center assesses weather opportunities. harsh is “MARGINAL” here and “SLIGHT” north of us in Wisconsin.

Full forecast details and more at WGN Weather Center blog

A little cooler on Wednesday

What means a cold “backdoor” ahead sags south with overnight storms and shuts down Lake Michigan winds, cooling Wednesday’s temperatures and dropping humidity a bit for the day – though not Warm, humid air will return in the Thursday / Friday time frame.

We’ve been told this past week, it looks like Wednesday will see winds moving away from the lake bringing some cool lake air into the Chicago area — and nowhere more than in the counties adjacent to the lake in Illinois, Wisconsin and parts of northwestern Indiana. So there will be significantly cooler temperatures on Wednesday and humidity will drop as well. If you do well inland on Wednesday, the warmth and humidity will continue.

Warmer weather will last for the week

Signs suggest warmth and humidity could rise again from Thursday afternoon to Friday

It remains to be seen how far-reaching the resurgence is. But it wouldn’t be surprising to see parts of the region back in the tropical air with high temperatures and humidity at the time. Cool with significantly reduced humidity on Sundays and Mondays.


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