The shelf cloud is one of the most misidentified clouds types; they are often mistaken for wall clouds. There are many stark differences between a shelf cloud and a wall cloud that makes either of them easy to identify. A shelf cloud can be found at the leading edge of a storm while the wall cloud, if it is present, will be located on the back side and along the base of the storm just behind the rain. A shelf cloud is caused by strong downdrafts of air that originate from near the top and front of the storm; these downdrafts bring cool air and plenty of rain. A wall cloud is caused by strong updrafts at the rear of the storm. There is often a strong cool wind gust that precedes the approach of a shelf cloud; this wind is referred to as straight-line winds or a gust front and can cause damage depending on the strength of the downdrafts. Due to the jagged appearance of a shelf cloud, there are often false Tornado Warnings issued as it approaches. Knowing the difference between a shelf cloud and a wall cloud will help you respond appropriately if you are in their path.