a cold front along which squalls or thunderstorms are likely
a cluster of severe thunderstorms or storm cells along a line
a giant band of dark clouds that may occur along fast moving cold fronts
a line of tower cumulonimbus clouds
a long line of thunderstorm cells, sometimes several hundred kilometres in extent
an area of cooler air in front of a cold front and also an area of instability where supercells form
a narrow band of active thunderstorms, often ahead of a cold front
a nonfrontal narrow band of active thunderstorms
Fictitious moving line, sometimes of considerable extent, along which squall phenomena occur.
A narrow band of thunderstorms that are not part of a well-defined frontal system (like a cold front), and that can generate intense weather nonetheless.
A solid or nearly solid line or band of active thunderstorms.
A line of solid or nearly solid thunderstorms or strong winds that might extend for several hundred miles.
Any nonfrontal line or narrow band of active thunderstorms extending across the horizon. It is of importance to fire behavior due to accompanying strong gusty winds and the possibility of such a line passing between regular weather observation stations without being reported. Also called line squall.
A broken or solid line of thunderstorms that may extend across several hundred miles, ahead or along an advancing cold front.
Any line or narrow band of active thunderstorms. The term is usually used to describe solid or broken lines of strong or severe thunderstorms.
any line or narrow band of active thunderstorms which is not directly along a frontal boundary
A line of showers or thunderstorms, often accompanied by strong gusty wind and heavy rain.
A line of thunderstorms or squalls which may extend over a hundred miles.
A line of thunderstorms that forms along a front.
A non-frontal band, or line, of thunderstorms.
Any line or narrow band of thunderstorms. These lines may be of considerable length, extending across multiple states.
A non-frontal line or narrow band of active thunderstorms.
A squall is a brief, sudden and violent windstorm often accompanied by rain or snow. A squall line is a group of squalls moving together often preceding a front of cold air moving into a warmer area.
Any line or narrow band of intense thunderstorms not directly related to a synoptic scale front.
A narrow band or line of active thunderstorms that is not associated with a cold front. It may form from an outflow boundary or the leading edge of a mesohigh.