isobars

Bernie, try search term 'isobars' - that's a weather map, showing contour lines with temperature ranges, that's the basic idea, I'd expect done the same way Did you get to the page with the 5,000 site data files?

RealClimate 2009

Bernie, try search term 'isobars' - that's a weather map, showing contour lines with temperature ranges, that's the basic idea, I'd expect done the same way Did you get to the page with the 5,000 site data files?

RealClimate 2009

On weather maps, pressure is indicated by drawing isolines of pressure, called isobars, at regular 4 millibar intervals (e.g., 996 mb, 1000 mb, 1004 mb, etc.).

Wind 2008

To connoisseurs in weather in the meteorological sense it was a joy and an ensample, for it was a perfect cyclonic storm, exactly the right shape, with all its little dotted lines of "isobars" running in ovals one inside another.

The Naturalist on the Thames 1882

'isobars' and they follow the course of places which have the same barometric pressure.

The Boy with the U. S. Weather Men Francis Rolt-Wheeler 1918

The tightly packed lines of equal pressure isobars indicate very strong winds over the region.

Snowstorm blasts New York, buries Boston Andrew Freedman 2011

The Monday, 2/8/10, 12z GFS model simulating snow over the region Wednesday morning and very strong winds depicted by the closely packed lines of equal pressure or isobars in black.

Amazing images of D.C.'s extreme 2010 weather Jason Samenow 2011

The black lines of equal pressure (isobars) are close together, indicating high winds.

Coastal storm to slam New England Jason Samenow 2010

Circular brown contours are lines of equal pressure (isobars).

Massive, historic storm tearing through Midwest Jason Samenow 2010

It's about like saying that changing isobars cause the weather, or breaking contour lines cause earthquakes.

Cluster Satellite Detects Rifts in Earth's Magnetic Field | Universe Today 2010