Iowans went from washing their cars to putting on parkas Sunday as the temperatures dropped from the 60’s down to as low the 20’s in parts of the state. National Weather Service Meteorologist Gary Forster says you can blame it on Canada.He says there was finally a weather pattern that allowed the cold Canadian air to blow into Iowa. Forster says this is the time of year when winter and spring weather patterns fight against each other, so some up and down temperatures are expected. He says don’t normally have 60-degree temps, so it is unusual to have such a big drop in temperatures in a day. The cold Canadian air is going to be around for awhile.The system will drop some snow across the state tonight and likely stick around through the end of the week.