Nodules on CT scan (3 replies): I had a CT scan ran twice on my lungs. It shows multipl... [more]. Ground glass opacities. Hi, Just got the CT scan result back. A 7mmx4mm gro... [more]. Continue discussion. This discussion is closed.
Isobars are lines of constant or equal pressure on a weather map. They can be used to find areas of low or high pressure over a broad area (like the U.S.), and they can tell us how intense the system may be.
Stationary fronts prolong bad weather. A cold front is the boundary between cool and warm air when the cool air is replacing the warm air. A warm front is the boundary when the warm air is winning the battle. When the pushing is a standoff, the boundary is known as a stationary front. Stationary fronts often bring several days of cloudy, wet weather that can last a week or more. Since neither the warm air nor the cold air are advancing, the stationary front weather map symbols combine both the cold front and the warm front symbols. Maps show stationary fronts with alternating triangles pointing away from the cold air and half circles pointing away from the warm air. Color maps alternate the cold front blue and warm front red. A weather map's frontal position shows where the boundary touches the Earth.