Low clouds on Monday endured a lot of the day, limiting space temperatures to the low 40s at most places. The excessive of forty levels at O’Hare airport was 10 levels under regular. Chilly temperatures have been widespread the opening 2 weeks of November, the coldest such interval in 21 years. Milder air is to make its method into the area in coming days, although readings are nonetheless anticipated to common at, or barely under regular. Temperatures are more likely to spike Friday, when a deepening storm system is to comb 50-diploma air into the area. Thunderstorms might accompany a robust chilly entrance late Friday, and the Storm Prediction Middle has highlighted the metro space for a danger of extreme climate. Temperatures are then forecast to plummet, with highs by Sunday struggling to succeed in freezing.