Heat, humidity return this week with chances for storms

Heat and humidity return by the middle of the week.

The cooler, refreshing air that settled into eastern Iowa on Sunday brought us the first below normal day of the month.

Monday will be similar to Sunday. An upper level low spinning over the Great Lakes will bring in colder air aloft and combined with the heating of the day, some instability isolated showers are possible. They will be hit and miss and much of the area will not see any and remain dry.

The less humid and comfortable weather will continue through Tuesday with slightly below normal temperatures before the summer heat and humidity surge back in Wednesday and Thursday with readings climbing into the 80s and dew points in the 60s, making for a couple uncomfortable days, but we should be used to that by now given how this month has been.

The upper level pattern will flatten out by Wednesday as a west-to-east zonal flow will bring in warmer Pacific air and moisture. A few disturbances will pass through the flow bringing chances for showers and thunderstorms. The first will arrive Wednesday night into Thursday and another chance Thursday night and Friday, although specific details regarding those still remain and will be fine tuned over the next few days.

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