An anonymous reader writes "A huge, lingering ridge of high pressure over the eastern half of the United States brought summer-like temperatures to North America in March 2012. The warm weather shattered records across the central and eastern United States and much of Canada. From the article: 'Records are not only being broken across the country, they're being broken in unusual ways. Chicago, for example, saw temperatures above 26.6Celsius (80Fahrenheit) every day between March 14-18, breaking records on all five days. For context, the National Weather Service noted that Chicago typically averages only one day in the eighties each in April. And only once in 140 years of weather observations has April produced as many 80Fahrenheit days as this March.'"