Upper Midwest — The cold weather blast expected to hit the state is part of the ongoing La Niña weather pattern that’s been impacting Iowa and the rest of the Midwest.
State Climatologist Justin Glisan says the system has been on an unusual run.
The weather pattern keeps the cold air flowing over Iowa.
Glisan says the La Niña is expected to fade in the spring in a gradual transition.
ENSO neutral means an equal chance of warmer or colder temperatures during the winter or more normal conditions. Glisan says they see a 71 percent chance for the change.
Glisten made his comments during the recent north-central region climate update.
