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.
While tornado season â the time of year that historically produces the most tornadoes â runs from early spring through mid-summer, tornadoes can happen any time of year if the conditions are right. Essentially, this is any time when warm and cool air masses collide.