Using your cup of coffee to help predict the weather

Some people believe that the coffee you drink in the morning can help you predict the weather. Is there any basis for this or is it simply urban legend?

What You Should Know
According to urban legend, the bubbles in your coffee can predict the weather.

If the bubbles move to the cup’s center, high pressure is approaching.

When bubbles form along the cup’s rim, nearby low pressure is present.
The weather can be unpredictable; wouldn’t it be nice if we had a crystal ball to predict the future? Well, according to a weather myth, all you need is a cup of coffee to predict the weather for the day.

According to local legend, you can determine whether it will rain or be a sunny day by observing the bubbles. If the bubbles move to the center of the cup, then the pressure is high and the coffee’s convex surface is in the middle. Since bubbles are merely air, they rise to the highest point. Meaning the day will be beautiful.

If the bubbles form a ring around the edge of the mug, we can expect a low pressure system, which will cause the surface of the coffee to sink in the middle, indicating that rain is expected. If the bubbles move slowly to the edge of the cup, there will be some weather, but it will not last long.

While this may be entertaining to look at, the folklore lacks both research and credibility. For starters, the coffee cup must be flawless with straight sides, and the brew must be robust.

In addition, if your coffee lacks bubbles, you can remedy the situation by adding coffee to the cup with a spoon so that bubbles form.

In the end, there are simply too many variables involved in preparing the perfect cup of coffee, which will lead to an error in the experiment. The water’s temperature, the type of coffee, the brew’s concentration, and other variables may produce diverse outcomes.

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