Rounded, smooth, sack-like protrusions hanging from the underside of a cloud (usually a thunderstorm anvil). Mammatus clouds often accompany severe thunderstorms, but do not produce severe weather; they may accompany non-severe storms as well.
A rotating air mass within a thunderstorm which may produce a tornado, usually 2-6 miles in diameter and often found on the right rear flank of a supercell thunderstorm. On high-precipitation (HP) supercell, the mesocyclone may be found on the front flank. Although strictly speaking a radar term, a supercell may exhibit visual cues indicating [...]
Referring to weather systems smaller than synoptic-scale systems but larger than storm-scale systems. Horizontal dimensions generally range from around 50 miles to several hundred miles. Squall lines and Mesoscale Convective Systems (MCS) are examples of mesoscale weather systems
When conditions actually begin to shape up for severe weather, SPC (Storm Prediction Center) often issues a Mesoscale Discussion (MCD) statement anywhere from roughly half an hour to several hours before issuing a weather watch. SPC also puts out MCDs for hazardous winter weather events on the mesoscale, such as locally heavy snow, blizzards and [...]
At its most basic, a person who studies the science of weather. Often used to refer to professional persons who have completed a formal program of study and received a degree from an accredited educational institution in meteorology.
A convective downdraft with an affected outflow area of less than 2 ½ miles wide and peak winds lasting less than 5 minutes. Microbursts may induce dangerous horizontal/vertical wind shears, which can cause property damage.
Thunderstorms are organized in clusters of at least 2-4 short-lived cells. Convergence along the gust front(s) causes new storms to develop every 5-15 minutes
See Multicell Thunderstorm