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A cold front is the leading edge of a cooler mass of air at ground level that replaces a warmer mass of air and lies within a pronounced surface trough of low pressure.It often forms behind an extratropical cyclone (to the west in the Northern Hemisphere, to the east in the Southern), at the leading edge of its cold air advection pattern—known as the cyclone's dry "conveyor belt" flow.
In a warm occlusion, the cold air mass overtaking the warm front is warmer than the cold air mass receding from the warm front and rides over the colder air while lifting the warm air. [ 2 ] A wide variety of weather can be found along an occluded front, with thunderstorms possible, but usually their passage is also associated with a drying of ...
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.
The Lowcountry won’t get freezing temperatures like the West, but strong winds could pose problems, NWS says.
The advancing cold front across the central United States for midweek will shift the risk for drenching and locally severe thunderstorms eastward as well. ... D.C., and areas in between are all ...
A cold front, thunderstorms and a spreading bout of record heat are some of the weather extremes extending from coast-to-coast in the U.S. this week. ... Though the rain could cause flooding ...
Supercellular thunderstorm image showing cumulus inflow bands. Inflow is the flow of a fluid into a large collection of that fluid. [1] Within meteorology, inflow normally refers to the influx of warmth and moisture from air within the Earth's atmosphere into storm systems.
A squall line is an elongated line of severe thunderstorms that can form along or ahead of a cold front. [25] [26] In the early 20th century, the term was used as a synonym for cold front. [27] The squall line contains heavy precipitation, hail, frequent lightning, strong straight line winds, and possibly tornadoes and waterspouts. [28]