When a warm front passes through, the air becomes noticeably warmer and more humid than it was before. Symbolically, a warm front is represented by a solid line with semicircles pointing towards the colder air and in the direction of movement. On colored weather maps, a warm front is drawn with a solid red line. There is typically a noticeable temperature change from one side of the warm front to the other.
In the map of surface temperatures below, the station north of the front reported a temperature of 53 degrees Fahrenheit while a short distance behind the front, the temperature increased to 71 degrees. The conditions of occluded fronts arise whenever cold, warm and cool air combine. There are two types of occluded fronts: cold and warm.
The cold occluded front forms when a cold front overtakes a warm front. The warm front rises over the colder, which slowly creeps along the ground surface.
The weather characterizes a warm front when the occlusion begins but gradually changes into a cold front with low temperatures and heavy rain. The warm occluded front occurs when a cold front approaches a warm front layered over an extremely cold front. In this situation the cold and warm fronts rise and pass over the extremely cold front as it remains near ground level.
The resulting weather pattern is similar to that of a passing warm front. When warm and cold air masses meet and form a stationary boundary or front, there is no further movement from either one.
Their characteristics are similar to warm fronts but stationary fronts are less active and eventually fade away. A dry line is a frontal boundary separating hot, dry western air from warm, moist air in the east. They often occur during the spring in the plain states of the western U.
If the atmospheric instability in the warm air is strong enough, dry lines can spawn severe storms with tremendous winds, large hail and tornadoes. After the warm front passes, fair and milder weather is typical, however, a cold front is likely not far behind.
Basically, the larger the temperature gradient as in 30s on one side and 60s on the other the stronger the front is example of a strong front above. Fronts are also associated with low pressure systems, which you can learn more about here. Learning about weather is fun! And now, you can listen to weather discussions and topics in The Weather Lounge , a new podcast with meteorologists and hosts Brad Miller and Mike Mihalik.
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