Pennsylvania's diverse geography also produces a wide variety of climates, the state experiences icy winters and muggy summers. The largest part of the state, with the exclusion of the southeastern area, has a moist mainland climate. The hilly center of the state, the wintertime becomes cooler, the number of murky days increase, and snowfall amounts are greater. Western areas of the state, particularly locations near Lake Erie, can receive high amounts of snowfall annually, and the entire state receives plentiful precipitation throughout the year. The state may be subject to severe weather from spring through summer into fall. Tornadoes occur annually in the state, sometimes in large numbers.
