La Niña Returns: What It Could Mean for Northern Iowa This Winter

FOREST CITY – After a year of mostly neutral Pacific Ocean conditions, the National Oceanic and Atmospheric Administration (NOAA) says La Niña is back — and that could shape how northern Iowa experiences the upcoming winter.

According to NOAA’s Climate Prediction Center, cooler-than-normal waters in the Pacific are signaling the return of La Niña. The pattern is expected to persist through December and January before gradually fading toward neutral conditions by early spring.

So, what does that mean for us here in northern Iowa?

Meteorologists say La Niña winters typically bring colder temperatures across the Upper Midwest, along with an active jet stream that can lead to frequent swings between snowstorms and cold snaps. While every La Niña behaves a little differently, the general trend favors near- to above-normal snowfall and below-normal temperatures, especially during the first half of winter.

“We’ll likely see more frequent Arctic blasts and some sharp temperature drops,” said forecasters with WeatherIowa. “If the storm track sets up just right, northern Iowa could see several snow-producing systems between December and February.”

NOAA’s latest outlook also notes that the La Niña pattern is expected to weaken toward late winter, which may bring a gradual return to milder and possibly drier conditions heading into March.

Historically, La Niña winters have brought mixed results for Iowa — from harsh, snowy stretches to quick thaws and late-season storms. With this year’s event expected to be weak, local impacts could vary week by week.

Still, forecasters recommend Iowans be prepared for a colder and possibly snowier winter than the past couple of years.