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Mid June Heat Wave


Chicago Storm

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Just shy of 94° today ~ 93.8° Was 94.0° for the high today here. 92°/64° currently. ORD's high must have been intra-hour. Only seeing 93.9° on the hour.

Edit: Looks like Midway was a tad cooler then ORD - that's a change!

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I think that rain you had yesterday helped creep up the dewpoints in your area. Nothing higher than 66° here today.

Max dew at DTW was 68. DTW didnt have 3 hours of heat index AOA 100F, so as hot as it was, a heat advisory wasnt "officially" met. They do have an air quality alert for tomorrow. This is by far the most hot+HUMID weather weve had this year. Im going to the Tigers game tomorrow night and already threw some waters on the freezer lol. While tomorrow is a lock, unsure if we will hit 90F on Thursday, and if we dont this wont be an official heatwave. Its like those who wouldnt call the arctic front in Feb a "snowstorm" because it didnt drop 6". It dropped just under 5" but conditions were worse for several hours than in many "true" snowstorms. Even if we only end up with 2 days of humid 90s, it will feel more unbearable than 4-5 straight days of low 90s with relative low humidity.

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Max dew at DTW was 68. DTW didnt have 3 hours of heat index AOA 100F, so as hot as it was, a heat advisory wasnt "officially" met. They do have an air quality alert for tomorrow. This is by far the most hot+HUMID weather weve had this year. Im going to the Tigers game tomorrow night and already threw some waters on the freezer lol. While tomorrow is a lock, unsure if we will hit 90F on Thursday, and if we dont this wont be an official heatwave. Its like those who wouldnt call the arctic front in Feb a "snowstorm" because it didnt drop 6". It dropped just under 5" but conditions were worse for several hours than in many "true" snowstorms. Even if we only end up with 2 days of humid 90s, it will feel more unbearable than 4-5 straight days of low 90s with relative low humidity.

0z NAM showing 90s on Thursday from PTK south. With added help from the concrete tarmac and downsloping DTW hitting 90 on Thursday seems reasonable.

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0z NAM showing 90s on Thursday from PTK south. With added help from the concrete tarmac and downsloping DTW hitting 90 on Thursday seems reasonable.

MEX/MET both show 88, but thats an excellent point. Actually using trends and stuff, i can totally Thursday going like this: DTW maxes at an intra-hour 90F, which in the end is behind only YPI at 92. DET will hit 88, and the rest of the region will primarily be in the 85-87 range, with several 83-84s for northern areas.

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A new record high min will be set at ORD today, assuming nothing strange happens before midnight. The low this morning was only 78. The old record was 75 in 1931.

The same goes for RFD...

Low of 76, with the record high min being 74 (1953).

Records broken.

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RECORD EVENT REPORT

NATIONAL WEATHER SERVICE NORTHERN INDIANA

215 AM EDT TUE JUN 20 2012

...RECORD WARMEST LOW TEMPERATURE SET AT SOUTH BEND...

THE LOW TEMPERATURE OF 75 DEGREES YESTERDAY WAS THE WARMEST LOW FOR

THIS DATE. THIS PREVIOUS RECORD WAS 73 DEGREES SET IN 1975.

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MEX/MET both show 88, but thats an excellent point. Actually using trends and stuff, i can totally Thursday going like this: DTW maxes at an intra-hour 90F, which in the end is behind only YPI at 92. DET will hit 88, and the rest of the region will primarily be in the 85-87 range, with several 83-84s for northern areas.

With regards to DTW always being a warm spot, don't forget that's already built into the climate normals for that locale. As an example, DTW's normal temp through today in June is 68.0, by comparison, FNT is 65.1 degrees. So that's about a 3 degree daily difference in a 50 mile stretch. Obviously that gradient isn't your typical north/south one. So when DTW is a few degrees warmer than everyone else every day, it's already been accounted for in the temperature anomalies and shouldn't come as an unusual because those three degrees have already been built in.

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HRRR has been showing a section of SEMI on a line from Hillsdale to Oakland counties not even hitting 90 today.

Showing the same thing today. Obviously there's no reason to think it will be any more accurate then yesterday, but I am intrigued as to why it keeps showing this corridor or cooler temps. IIRC its shown something like this in the past as well.

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