The intersection point between two boundaries (dry line, outflow boundary, cold front, etc.), often a focus for thunderstorm development.
Is the triple point the center of the low?
It’s generally found to the right of the low pressure center. It is the warm sector of the storm. The blue colored line is the cold front.
What happens in an occluded front?
At an occluded front, the cold air mass from the cold front meets the cool air that was ahead of the warm front. The warm air rises as these air masses come together. Occluded fronts usually form around areas of low atmospheric pressure. … After the front passes, the sky is usually clearer, and the air is drier.
Are occluded fronts dangerous?
Cold Occluded Front
Cold fronts are responsible for the strong, severe storms that can produce damaging winds, hail and tornadoes. The weather also tends to exhibit a dip in temperature prior to the storms and a drastic change in wind direction and speed.
What is a weather occlusion?
In meteorology, an occluded front is a weather front formed during the process of cyclogenesis. The classical view of an occluded front is that they are formed when a cold front overtakes a warm front, such that the warm air is separated (occluded) from the cyclone center at the surface.
How is triple point possible?
The triple point occurs where the solid, liquid, and gas transition curves meet. The triple point is the only condition in which all three phases can coexist, and is unique for every material. Water reaches its triple point at just above freezing (0.01° C) and at a pressure of 0.006 atm.
Why is the triple point of water so unique?
The triple point is suitable because it is unique, i.e., it occurs at one single temperature = 273.15 K and one single pressure of about 0.46 cm of the Hg column. This point is unique because any temperature or pressure higher or lower will change the phase of one or more states of water.
What weather do cold fronts bring?
Cold fronts can produce dramatic changes in the weather. … Commonly, when the cold front is passing, winds become gusty; there is a sudden drop in temperature, and heavy rain, sometimes with hail, thunder, and lightning. Lifted warm air ahead of the front produces cumulus or cumulonimbus clouds and thunderstorms.
Do occluded fronts cause thunderstorms?
There are four types of weather fronts that cause thunderstorms: cold front, warm front, stationary front and occluded front. Thunderstorms can become extremely severe and can appear seemingly out of nowhere along a front line.
What is the occluded front symbol?
The symbol for an occluded front is a purple line with alternating triangles and semi-circles (also purple) pointing in the direction the front is moving. Sometimes a cold front will “catch up” to a warm front and overtake both it and the cooler air out ahead of it. If this happens, an occluded front is born.
What type of weather does high pressure bring?
A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere. These bring sunny skies.
What is a frontal depression?
A frontal depression is a low-pressure area formed at the boundary between two different air masses. It occurs in middle or higher latitudes. … Since the density of warm air is less than that of the cold air, the bulge is an area of low pressure surrounded by areas of high pressure on three sides.