I stumbled upon this little Gem of information a couple of weeks ago, and thought I would give it a try a few times over the course of a couple of weeks, and low and behold, no kidding this really does work. Here in Ontario, it seems like it has rained for months and months, so it was perfect timing. Thanks to Instructables for this information. Link below.
So here is how the concept works!
When you pour the coffee into your cup, watch the bubbles.
If the bubbles move to the edge of the cup rather quickly, that's a good sign. Expect clear skies for the next 12 hours.
If the bubbles hang around in the center of the cup, get out your rain gear. You can expect rain in 12 hours.
If the bubbles slowly move to the edge of the cup, you may get a bit of weather, but it should be clearing in a few hours.
If you've managed to make a cup without bubbles, flop a spoonful of coffee back into your cup and make some more bubbles.
The theory behind this trick is that high pressure will push the bubbles to the edge, and high pressure indicates a period of sunny, calm weather. Low pressure won't move the bubbles and low pressure systems typically bring unsettled weather.
Black coffee is fine. Hot tea or hot cocoa will work too.
Hope you try this and comment if your have success over the next 7 days. Have fun with this.
Happy Trails
Image Sources:
https://aumusiclibrary.wordpress.com/2011/02/28/rain-helens-picks-for-a-rainy-afternoon/
http://www.instructables.com/id/Predict-weather-with-a-cup-of-coffee/