Oct. 17, 2016: Summer’s back (for a day)! With a little help from strong southerly to southwesterly winds (both at the jet stream level and at the ground level), we saw temperatures soar into the middle 80’s this afternoon. Adding to the summer feel was a touch of humidity with dew points in the 60’s. Overall, a weather pattern that resembled something we see more often in August rather than October gave us a quick step back in seasons.
This isn’t unheard of, of course. On average, we usually see a day one last day in the 80’s around October 7th. The latest on record was November 1st, 1933, when temperatures were a whopping 25° above average, setting a record for that day, as well as the record for latest 80° in Rockford.
Today’s weather has been part of an impressive warming trend since the weekend. We are on a streak of 3 days in a row above 70°, and that should carry on into Tuesday. After that, we start going back toward fall weather.
We’ll be stepping down gradually as a series of cold fronts move though. By Friday, we’ll be at least 25° than where we were today. We’ll be dropping 10° at least each time a cold front moves through (tonight and Wednesday night).
Will this be the end of the 80’s for the year? It looks that way, at least right now. The odds are against us for getting an 80° past this date anyway, plus there aren’t any persistent signals in several longer range models that show anything this warm for the rest of the month or into early November. We will likely remain above average for a while, so the occasional 70° day may pop up, but I think the 80’s may be gone again until next spring.
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