Humidity dives overnight behind cold front; heat arrives for first weekend of June

Weather

WIND SHIFT

We have had at least a trace of rain eight of the past 10 days in Indianapolis and within the last 24 hours, over 1″ of rain has been recorded. Officially 1.19″ but with slow moving downpours and repeat thunderstorms, some locations have topped 2.50″ of rain. Reports from Decatur county at Lake Santee were 2.75″.

A wind shifting front as passed late Thursday and behind it, cooler and drier air. The dew point – the true measure of moisture in the air is sharply dropping overnight and that means it will be much more comfortable by sunrise. Temperatures will lower into the 50s by sunrise Friday morning but dry air also heats quickly.

Oddly, despite a passing ‘cold front’ we are looking at a strong warm up starting Friday afternoon as winds turn again to the southwest after some early morning clouds. Dry air also heats quickly, and temperatures will jump well into the 80s Friday afternoon.

DRY HEAT

Humidity levels will remain low all weekend long as the dew point hangs neat 60° – so even lacking the humid air, it will be quite warm with temperatures seven to as much as ten degrees above normal. Sunday’s forecast to be the warmest of 2021 with a high of 89°.

Early morning lows are to remain comfortable but next week the tropical air is set to surge into central Indiana – the most humid air of the year. With added humidity there will be a daily chance of showers and thunderstorms starting Monday.

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