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Surface Fronts [Printer Friendly Version]
In addition to High and Low centers, you may see one or more of these
eight features on a surface analysis or forecast:
A hash mark denotes a change in frontal type, as in the example below.
Note: The hash mark will always be drawn perpendicular to the boundaries. They are not drawn at "triple points" (the intersection of an occluded, cold and warm or stationary front) and where a low pressure center separates the different frontal types.
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Rainfall