Predict Weather With a Cup of Coffee

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Introduction: Predict Weather With a Cup of Coffee

About: Mops from sticks and rags. Cheap!

I learned this trick reading Backpacker Magazine years ago while waiting for an air taxi flight into the Nahanni River. It really works.

Make a cup of coffee. I like to add cream and sugar since it makes the bubbles easier to see but black coffee is fine. Hot tea or hot cocoa will work too.

Step 1: Watch the Bubbles

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.

Step 2: Theory

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.

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    59 Discussions

    0
    nivyawsome
    nivyawsome

    4 years ago

    wow this amazing.

    0
    patatarium
    patatarium

    5 years ago

    Amazing I gonna try it !

    0
    kelsey.bailey.391
    kelsey.bailey.391

    6 years ago

    My mom told me about this about a month ago. The few times I done it, it was right. Crazy how such a little everyday things works :)

    0
    Brian H
    Brian H

    9 years ago on Introduction

    Adams had been to The End of Time Restaurant, so he naturally knew all.

    P.S. The coffee trick works best if you can get exactly 42 bubbles ...

    0
    fazgard
    fazgard

    Reply 8 years ago on Introduction

    I wonder what the improbability factor of getting exactly 42 bubbles would be?

    0
    Brian H
    Brian H

    Reply 8 years ago on Introduction

    Infinity, of course, give or take 42,000,000,000,000,000,000,000.

    0
    finton
    finton

    Reply 7 years ago on Introduction

    Which, of course is 42 x 10^(42/2). The chances of this occurring randomly is, well, pretty Improbable - as a rough Guide.

    0
    mikeltv1
    mikeltv1

    8 years ago on Introduction

    How exactly does this work? I drink tea every day and I never noticed this cool trick. I should try it.

    0
    stickmop
    stickmop

    Reply 8 years ago on Introduction

    See Step 2. Brew and brood about it; perhaps you can raise a thunderboomer.

    I've been using this method of predicting the weather for about two months now, and it hasn't failed oncen
    It works 100% :)

    0
    stickmop
    stickmop

    Reply 8 years ago on Introduction

    Nice!

    On the other hand, I've had a couple of failures since I moved close to the shore of Lake Superior a couple of years ago. Seems like sometimes the predicted rain stays out over the lake and doesn't make it to shore.

    0
    aristide202
    aristide202

    8 years ago on Introduction

    Is there any best temperature of coffee or temperature difference between coffee and air around to perform the observation^
    You're supposed not to stir your coffee, is it ? Just leave it still and observe the phenomena. I don't catch the theory of atmosphere pressure pushing significantly
    on coffee surface, Ok it does but that's sounds like atmosphere blowing more or less in the centre of the cup and why not the reverse , I mean some kind of blow from side to center or the like. What about influence of air % humidity?

    0
    stickmop
    stickmop

    Reply 8 years ago on Introduction

    Temperature differences haven't affected my observations I don't think.

    Stirring tends to either move the bubbles to the outside edge or congregate them in the center vortex, so that's a no-no. You do run into problems when the coffee doesn't cooperate and you have to use your spoon to make bubbles. A dip and splash technique usually avoids excessive manual bubble movements.

    Barometric pressure may be affected by humidity, so that could affect the bubble reading. To avoid that you could dispense the coffee into a clear wet bulb I suppose. Don't know, just slinging out ideas, but some of this stuff can make you go psychro (sic) on the meter scale.

    Saw this a few days ago - we've been having an unusual heat spell due to a high pressure front that's moving away.

    So far the predictions of the cup have been ringing true, I drink a lot of coffee...

    The weather report agrees too, so it may be wrong yet, it's not right often...

    0
    Browncoat
    Browncoat

    11 years ago on Introduction

    Neat!! I assume this would work with about any beverage...?

    0
    Browncoat
    Browncoat

    Reply 11 years ago on Introduction

    Just watched the bubbles in my wine & compared it to Weather.com. They matched! :)

    0
    gestault
    gestault

    Reply 8 years ago on Introduction

    I tried this experiment with Vodka but always needed a lot of data so, after a while into my lab time, I didn't care what the weather was...

    0
    digimancer
    digimancer

    Reply 8 years ago on Introduction

    LOL doesn't work if your are passed out the next day either.