Monthly Archives: March 2021

A general conclusion to be drawn from yesterday’s letter is that when areas of below-freezing surface temperatures in a hemisphere are diminished, which is a regular event each spring, the “blue zone” of air pressure differentials in that hemisphere will … Continue reading →

Something to celebrate—the Windy website has returned, with improvements, after an absence of several months.  This is a tremendous source of information about almost every component of weather in the lower part of the atmosphere that you could ever think … Continue reading →

For the past year these letters have been devoted to study and interpretation of the Climate Weather Maps. They have taught me many things about what I have come to believe is the way nature really works–even when there is … Continue reading →

Air pressure configuration in the upper part of the troposphere, as shown on the Weather Maps at an altitude of 500hPa (about three miles), plays a vital role in the progression of surface temperature changes in the mid to upper … Continue reading →

Note: Unfortunately, the first two maps in this letter do not represent the original image inputs and must be disregarded. An unknown computer glitch is causing these images to be updated each day, something I now have no way to … Continue reading →

In yesterday’s letter I left out part of the story, which would have made it even more interesting.  Why are we seeing this strong surface wind, carrying such a huge amount of precipitable water (PW), following the particular route it … Continue reading →

There is something happening in North American weather today that is a bit different from the norm, and for me a real wake-up call. An ordinary small scale phenomenon that I pay little attention to has blossomed into something big. … Continue reading →

I am greatly interested in the relationship between the 500 hPa air pressure configuration, as we see it on one of the Weather Maps, and surface air temperatures on another map. These images are spatially separated by a minimum of … Continue reading →

My theory of causation of everyday global temperature changes places sharp focus on the power and behavior of precipitable water (PW) in the atmosphere, especially the portion of it that escapes into the upper part of the troposphere that is … Continue reading →

Antarctica usually has a nicely compacted air pressure configuration in its upper troposphere, which keeps jetstream wind velocities strong and a band of streams in place that are tightly wound around the central area shaded in blue. Streams of high-level … Continue reading →