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 ...

A bar is a metric unit of pressure and isobars are lines on a weather map that connect points of equal air pressure. Because variations in air pressure drive atmospheric winds, isobars give ...

CONFUSED by a trough? Don’t know the difference between a low and high? Here’s how to make sense of the weather. And while the weather presenter pointing at all the bright lines and markers on the ...

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 ...

Isobars are lines/areas of equal pressure represented on a weather map. When isobars become very tightly grouped together it indicates a "tight pressure gradient" (steep slope). The tightly packed ...

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 ...

MIKE MOSS SAYS: Randy, There isn't a single, enformced standard for what we would call the "contour interval" for pressure analyses. However, there are three such spacings that are by far the most ...

Those of you who follow me on Twitter or Instagram (@PGLocal4) periodically see me post one of my hand-analyzed maps…I usually do this if an impactful storm is approaching. There’s a lot of interest ...

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 ...