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September wraps warmer & wetter than the norm, October may follow suit

News, Weather

October 1st, 2019 by Ric Hanson

(Radio Iowa/KJAN) — September wrapped up in Iowa feeling more like June. State climatologist Justin Glisan says the statewide average temperature for the month ended up around 68-degrees, which is five-degrees warmer than normal. Glisan says besides being warmer, the weather was also wetter. “We were at about 6.5 inches across the state and that’s almost 3.38 inches above average,” Glisan says. “Yes, trending wet. If you look at the borders between Iowa and Illinois, anywhere from 200 to 300% above normal precipitation.”

Here in Atlantic, September was also wetter and warmer. Rainfall for the month, which is normally 3.81 inches, amounted to 8.82 inches, or nearly 5 inches above average. The average High last month was 81, which was about 5 degrees warmer than normal, and the average Low was 58, or about a little more than 7 degrees above normal.

Glisan says forecasts indicate the shift toward wetter, warmer weather may well continue into this month. “We should see seasonal if not slightly above-average temperatures for the first part of October,” Glisan says. “As for rainfall, we are having higher probabilities of wetter-than-normal conditions.” We saw a very similar set-up heading into autumn a year ago. “We did see the third-wettest September in 2018 followed by the seventh-wettest October, combining those for the third-wettest fall on record,” Glisan says. “Hopefully, we don’t get into that type of situation this year.”

In October, Atlantic typically receives 2.76 inches of rain. The average High is 64.1, and the average Low is 39. The flash flood watches being issued by the National Weather Service have multiplied in number since Monday and now cover 78 of the state’s 99 counties.  “We’re stuck in this jetstream pattern where we’re getting wave after wave of rainfall over the state,” he says. “These flash flood watches span several states.” Forecasters say dry weather is expected later this week, on Thursday and Friday, but more rain is likely Friday night and into Saturday.