After a summerlike open to October, the Chicago area has experienced a prolonged spell of below normal temperatures. Since the 10th, the city has registered only one mild day. Readings are forecast to stay below normal through Sunday, though conditions will not be as adverse as last weekend. Though still on the chilly side, temperatures this weekend are forecast to average 9 degrees warmer than last. Our region will lies west of a large storm system forecast to bring rain, snow and high winds to the Northeast. Winter weather advisories have been posted for portions of upstate New York and New England, with wind advisories for the Boston area where gusts may top 60 mph. No snow is forecast for Chicago, but another system arriving from the northwest is expected to bring clouds and rain late Saturday night and early Sunday.