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.
Which tornados occur most often weak strong or violent? Weak tornadoes (EF0 and EF1) are by far the most common accounting for 89% of all tornadoes. Strong tornadoes (EF2 and EF3) are next, accounting for about 10% of tornadoes.Fi â¦ nally come violent (EF4 and EF5) tornadoes, which account for less than 1% of all tornadoes.arm moist air from the Gulf of Mexico frequently moves over the region from the south. This col â¦ lides with cool air from Canada and dry air from the Rockies. This collisions of air mass is often triggers thunderstorms, often very strong ones. The region also frequently gets strong wind shear.