Many of us are dealing with these very frigid temperatures today that forced many school districts to close. Overnight tonight, winds will shift out of the southwest which will then help warm temperatures up. Temperatures will still be below zero with wind chills between -20°F and -40°F, so the wind chill warning will remain in place through midday tomorrow. Tomorrow we will finally warm it back above zero as warm air advection will help with this.
The next chance for precipitation will be on Wednesday and this will be in the southern half of the state as a weak disturbance moves through the state. It is possible that we could see some light snow from this disturbance but not expecting any accumulations, just a minor dusting. This system will then quickly push off to the east before our next system moves in Friday afternoon.
This system we have been keeping an eye on as it has been shifting from run to run. The newest 12z GFS run, now has an area of precipitation further north. However, the main concern is that the mid to lower layers of the atmosphere are warm enough across southern Iowa that we could see some freezing rain from this event. Right now the 12Z GFS run has 0.3” of an inch of ice accumulation for Davenport with 0.13” ice accumulation for Ottumwa. This is up from previous runs which had less precipitation. Snowfall looks to remain light with this storm system as well. Once again we are still 120 hours out from this system so we will have to keep an eye on this as it could be a tricky forecast deciphering how much snow will fall due to the warm layer and how much ice will accumulate if it does. Keep checking back to the iowachase.com for the very latest.