MINI HEAT WAVE: Why did it get so hot? - KMSP-TV

MINI HEAT WAVE: Why did it get so hot?

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Unlike our winters here in Minnesota, if you're not a fan of the sultry heat, then wait a little while and it will most likely be gone. That was certainly the case with our last surge of summer on Monday. How is it that oppressive heat and humidity can grasp other parts of the country for months at a time and leave us high and dry after 24 hours? It all has to do with our position in this country, geographically speaking of course. We are living on the edge here in the upper Midwest. This weekend we were on the northern part of a bubble of heat and the southern part of a bubble of cold. This last heat wave was a good example of just that, as the jet stream, the river of air that separates the hot and cold air masses, played a game of tug of war with the north and south. The high pressure out west continued to build. The clear skies allowed for the solar energy to heat the atmosphere and the compression of the air from the high itself warmed the air even more. Below are a few maps of the Jetstream position over the past few days. The maps clearly show us dodging in and out of hot and cold.

We were definitely under the gun during this last blast of summer. A double shot of heat and humidity flooded the upper Midwest. Thanks should be given to a large dome of high pressure, and an advancing system to our north, that joined forces to jack up the temperatures and dewpoints.

Here in the Twin Cities we didn't break a record on Monday but we came close with a high of 94°. Then after a brief encounter, the systems moved on, leaving us behind in a cooler and drier air mass. Below is a map of our high temperatures across the state on Monday. You can easily draw the Jetstream between the "Haves" and the "Have Nots".

We also added to our bank of 90s. Monday marked the 19th time this year we were 9/10ths  of the way to the century mark.


Whether you are looking forward to the cooler temps ahead or savoring the heat of the past, you will most likely not have to wait long before seeing another major change in the weather.

We would love to see your weather photos! Email them to . Also I hope you will LIKE my Facebook page!/SteveFrazierFox9Kmsp and follow me on Twitter at @FrazierFox9 . Thanks for watching! FRAZIER




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