“The 2012 growing season has started in Southeast Michigan, about 5 weeks ahead of schedule. Therefore, the NWS Detroit/Pontiac office will start issuing frost advisories and freeze warnings as conditions warrant.”
The string of warm weather in March is unprecedented. The National Weather Service noted that “This stretch of warm weather comes on the heels of Detroit’s 5th warmest winter on record, the 12th warmest autumn, and a summer which featured July as the hottest month ever recorded in Detroit.”
The NWS noted that it had to go back 125 years, to 1886, to find an early-season warm spell that compares. The 1886 record occurred in April, a full month later. Needless to say, this stretch of nine consecutive 70 degree days already represents a new March record for Detroit, Flint, and Saginaw.