Hourly weather observations that include sea-level pressure readings are plotted or printed on weather maps that meteorologists can analyze. Isobars are drawn by connecting points having equal ...

MIKE MOSS SAYS: Phil, Winds would be perpendicular to the isobars is not for the rotation of the earth, which imposes a virtual force called the Coriolis effect. Over a significant time and distance ...

Using isobars on weather maps is completely accurate. Wind derives its initial speed and direction from changes in air pressure over distance, or pressure gradient force (PGF). This is why when ...

An isobar is a line of constant pressure. These lines are often measured in 2, 4, or 10 millibar increments. When you see lots of isobars over an area, most likely that area is experiencing lots of ...

What are fronts? These are just boundaries between air masses of different temperatures. Cold: This is a type of front where cold air is replacing warmer air at the surface. Warm: This is a type of ...

Surface pressure troughs are elongated areas of low pressure that indicate a wind shift and pressure change, similar to a front, and represent surface convergence. Unlike fronts, most troughs depicted ...

Tropical winds, torrential rain, frost and rolling fog banks promise a freakishly weather-weird Halloween. The second of a ...

Hourly weather observations that include sea-level pressure readings are plotted or printed on weather maps that meteorologists can analyze. Isobars are drawn by connecting points having equal ...