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Outflow boundary on radar with radial velocity and frontal boundary drawn in.. An outflow boundary, also known as a gust front, is a storm-scale or mesoscale boundary separating thunderstorm-cooled air from the surrounding air; similar in effect to a cold front, with passage marked by a wind shift and usually a drop in temperature and a related pressure jump.
This makes it possible to locate the outflow boundary when using precipitation mode on a weather radar. Also, it makes outflow boundaries findable within visible satellite imagery as a thin line of cumuliform clouds which is known as an arcus, or arc, cloud. The image to the right depicts a particularly strong outflow boundary ahead of a line ...
The main instrument in this research was an S-band circularly polarized weather radar located at the Red Deer Industrial Airport in central Alberta, Canada. A vast amount of data was collected from several other platforms to conduct research into precipitation mechanisms, severe storm development, hail suppression, hydrology and microwave ...
Near the surface, the MCC exhibits high pressure, with an outflow boundary, or mesoscale cold front, at its leading edge. This high pressure is caused by the cooling of the air from the evaporation of rainfall (commonly referred to as a cold pool).
They may also be visible as an outflow boundary hours or days after convection and can pinpoint areas of favored thunderstorm development, the possible direction of movement, and even likelihood for tornadoes. The speed of forward movement of the outflow boundary or gust front to some degree modulates the likelihood of tornadoes and helps ...
The radar signature of an RFD is a hook-like structure where sinking air has brought with it precipitation. ... landspouts sometimes occur on the outflow boundary of ...
planetary boundary layer (PBL) pluvial lake; pneumonia front; polar circle; polar climate; polar easterlies; polar high; polar ice cap (polar light: see) aurora (astronomy) polar low (polar mesospheric cloud) noctilucent cloud; polar mesospheric summer echoes (PMSE) polar night; polar region (polar reversal) magnetic polarity reversal
A shelf cloud, such as this one, can be a sign that a squall is imminent.. A mesoscale convective system (MCS) is a complex of thunderstorms that becomes organized on a scale larger than the individual thunderstorms but smaller than extratropical cyclones, and normally persists for several hours or more.