colorectal. pertaining to or of the nature of the colon and the rectum. colorectal polyp. benign or malignant; most commonly occurs at the anorectal junction in middle-aged dogs, causing diarrhea, dyschezia and rectal bleeding.
Although favorable conditions for tornadoes in the United States can occur at any time, they are most common in spring and least common in winter. Because spring is a transitional period for the climate, there are more chances of cooler air meeting with warmer air, resulting in more thunderstorms.
Tornadoes are most common in the central part of the United States, known as the Great Plains.This area is suited to bring all of the ingredients together to forms tornadoes. More than 500 tornadoes typically occur in this area every year and is why it is commonly known as Tornado Alley.. Copyright 2009 WFMZ.All rights reserved. This material may not be published, broadcast, rewritten or redistributed.ore than 500 tornadoes typically occur in this area every year and is why it is commonly known as Tornado Alley.. Copyright 2009 WFMZ. All rights reserved.