The leading edge of a cold air mass. Cold frontal passages are usually associated with sharp wind shifts, pressure rises, showery or stormy conditions, and rapid temperature drops.
Zone in which a dense, cooler air mass advances toward a warmer air mass. Depicted on weather maps by a blue line and triangles.
Used in meteorology to describe a mass of cold air moving toward a mass of warm air. Strong winds and rain typically accompany a cold front.
The boundary line between the advancing cold air at the rear of a depression and the warm sector. Line squalls may occur at the passage of this front, which was formerly called the squall line.
A moving boundary of cooler air displacing warmer air.
The leading edge of a cold air mass as it moves toward warmer air; its movement is characterized by a drop in temperature and humidity after the front passes.
Leading edge of an advancing mass of cold air. Compare warm front.
The leading portion of a cold atmospheric air mass moving against and eventually replacing a warm air mass. A front is the area of contact between air masses.
A boundary separating cold and warm air masses at which the cold air is advancing.
An advancing mass of cold air, frequently bringing thunderstorms.
the front of an advancing mass of colder air
a place where cold air pushes out warm air
a warm-cold air boundary with the colder air replacing the warmer
a gust of cool air.
A boundary that forms when a cooler air mass replaces a warmer air mass.
The leading edge of a mass of air that is colder and drier than the air mass being replaced.
A transition zone where cold air moves in and replaces warm air.
the line behind which a cold air mass is advancing, and in front of which a warm air mass is retreating.
The place where an advancing cold air mass meets a warm air mass.
Boundary between advancing cold air and warm air which it is replacing. A cold frontal passage is accompanied by showers or thunderstorms, rising air pressure, and a sudden wind shift, generally from south or southwest to north or northwest.
A transition zone where a cold air mass advances and replaces a warm air mass.
The transition zone where a colder air mass overtakes and replaces a warmer air mass.
The leading edge of a relatively cold air mass which displaces warmer air, causing it to rise. If the lifted air contains enough moisture, cloudiness, precipitation and even thunderstorms may result. As fronts move through a region, in the Northern Hemisphere, the winds at a given location will experience a marked shift in direction. Ahead of an approaching cold front, winds will usually shift gradually from southeast to south, and on to southwest. As a cold front passes, winds shift rapidly to west, then northwest. Typical cold front windspeeds range between 15 and 30 mph but can be much higher.
A warm-cold air boundary with the cold air advancing.
The leading edge of an advancing cold air mass that is under running and displacing the warmer air in its path. Generally, with the passage of a cold front, the temperature and humidity decrease, the pressure rises, and the wind shifts (usually from the southwest to the northwest in the Northern Hemisphere). Precipitation is generally at and/or behind the front, and with a fast-moving system, a squall line may develop ahead of the front.
The boundary between a cold air mass that is advancing and a relatively warmer airmass.
The leading edge of a relatively cold air mass that displaces warmer air. The heavier cold air may cause some of the warm air to be lifted. If the lifted air contains enough moisture, the result may be cloudiness, precipitation, and thunderstorms. If both air masses are dry, no clouds may form. Following the passage of a cold front in the Northern Hemisphere, westerly or northwesterly winds of 15 to 30 or more miles per hour often continue for 12 to 24 hours.
The leading edge of a cold air mass advancing into a warm air mass
an advancing edge of a cold air mass
The leading edge of a colder mass of air that displaces a warmer mass of air.
The leading edge of a relatively colder air mass which separates two air masses in which the gradients of temperature and moisture are maximized. In the northern hemisphere winds ahead of the front will be southwest and shift into the northwest with frontal passage.
is a air mass movement in which a mass of cold air advances into territory occupied by warm air
A transition zone in the atmosphere where an advancing cold air mass displaces a warm air mass.
The leading edge of a relatively cold air mass that displaces warmer air. Following a cold front passage, westerly winds of 10 to 20 mph, or more, often continue for 12 to 24 hours.
The boundary between two different air masses where cold air pushes warm air out of the way and brings colder weather.
Any nonoccluded front, or portion thereof, that moves so that the colder air replaces the warmer air; that is, the leading edge of a relatively cold air mass. Compare cold type occlusion.
Cold Front is the 10th episode (production #111) of the television series Star Trek: Enterprise.