![]() Two or three, whole or broken, horizontal lines symbolize. Precipitation is often depicted on weather maps by a variety of symbols as shown on this map including stars or asterisks (*) to represent. is a front.Ĥ.Ěccording to the map, persons living in South Carolina can expect weather after the front passes.ĥ. The front plotted in the Southeastern U.S. The leading edge of advancing warm air is a warm front and is signified by red semi-circles on the side of the front’s movement. The leading edge of advancing cold air is a cold front and, as shown in the map legend in Figure 1, is signified by blue spike symbols which are pointing in the direction toward which the cold front is moving. These boundaries, called fronts, typically separate warm and cold air-the major determiner of air density differences. Because air masses of different densities do not readily mix, boundaries separating air masses tend to remain distinct and persistent. In the atmosphere, broad expanses of air with generally uniform temperature, humidity, and therefore density come in contact with other masses of air having different temperature, humidity, and density characteristics. The thick curved lines with triangles (spikes) and/or semi-circles on the map are air mass boundaries. Moving outward horizontally in any direction from the red L located in Lower Michigan, air pressure would. Idealized surface weather map showing some common map symbols.Ģ. Moving outward horizontally in any direction from the blue H positioned in Texas, air pressure would. The H’s and L’s identify centers of relatively high or low air pressure compared to their surroundings. The weather map symbols shown are those commonly seen on the Internet, television, and in newspapers. Describe general relationships between wind patterns and the high and low air pressure centers shown on weather maps.ġ.Ğxamine the surface weather map presented in Figure 1 of this investigation.Identify fronts appearing on the map, the weather likely to be occurring on either side of a front, and the motion of fronts. ![]() Decode the symbols appearing on a surface weather map and describe weather conditions at various locations.The surface weather map is a useful tool for depicting weather conditions over broad areas.Īfter completing this investigation, you should be able to: Weather is defined by various elements including air temperature, humidity, cloudiness, precipitation, air pressure, and wind speed and direction. For instance, Tropical Storm and Hurricane use the same icon as Thunderstorms.Weather is the state of the atmosphere at a particular time and place, mainly with respect to its impact upon life and human activity. Note that some icons are used for multiple weather conditions. Close enough that you should be able to find a match if you are unsure what an icon means. However, the following set comes very close. But none exactly match the ones used on the iPhone. Yahoo has many different sets of weather icons for use on their sites and by third-party developers. Not only is there not a guide, but it seems the icons used in the iPhone app are not used anywhere else. So you would think that there would be a guide somewhere to these icons. A bright yellow sun means “sunny.” But others are less obvious. But the iPhone Weather app doesn’t include descriptions of the graphic icons that appear next to each day. The forecast should be the same as if you want to Yahoo and looked up the weather for your area. A common question people have is “What does this icon mean in the iPhone Weather app?” The iPhone Weather app gets its information from Yahoo Weather.
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