How to paint a stormy sky in watercolour

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Here is my method of painting a stormy sky.

Let me say at the outset that this method is not for the faint hearted, but it is great fun and totally unpredictable, so here goes.

The sky will be painted wet into wet, that is wet paint onto wet paper. The colour I have used is Tintoretto Caput Mortem, but you can use any really dark blue. In the past I have used Indigo, or Paynes Grey or Ultramarine Blue mixed with Light Red Oxide. I have also seen great results by an Australian artist called John Lovett, who uses Indigo, then pours white gouache onto the paper, with great effect.

Because it’s painted wet on wet, the wet paper will dilute the colour, so you can compensate for that by mixing your colour stronger. Watercolour paints dry lighter anyway so don’t be afraid of the dark side Luke…..

HOW DO I DO IT ?

First prepare your paint, I use a dish. Make sure that you mix more than you need because this sky will take just a couple of minutes, and the last thing you need is to be mixing more colour during this adrenalin rush. You simply won’t have the time. This is why I use dishes, so mix the paint the consistency of gold top milk.

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You can check the tone by dragging the mixed paint up the side of the dish it should hold together underneath the brush, or you can check it on a test strip of the paper you are using. Mine is 300gsm (140lb) Bockingford Rough.

Now wash your brush out and start to paint the sky area with the water. Don’t worry if the water is slightly tinted, as  it helps you see where you have been. Working against the light also helps as I do.  I’m left handed so I work right to left, so if you are right handed start on the left. Work quickly but gently using brush strokes with a large round or mop brush diagonally at about 45 degrees. Choose the biggest brush you can handle, speed is the key on this type of sky.

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At the top of the sky leave a few dry areas, but have fewer (or none) lower down. These spaces will be for the shafts of light coming through the clouds when you start to paint. Aim for a sheen on the paper, no uncontrollable puddles or they will end up causing back runs.

Now very bravely and confidently repeat the same brush strokes with your dark blue paint. Make sure that you have wiped your brush on an old towel or tissue. If you don’t the excess water in the brush both weakens the paint and can also cause cauliflowers.

Work really fast and try and get the paint on the paper quickly. I find that particularly with beginners that they are afraid and want to consider every single brush stroke. Frankly working quickly is more important than getting it right. Just whack the paint on as fast as you can !

THIS IS THE IMPORTANT BIT

Hold your board almost vertically and at an angle AND KEEP IT AT ONE ANGLE.

This suggests rain (and also lightning by the way), and rain comes down usually in one direction. Put some paper towel  on your table to mop up the drips. The strongest colour will be at the top of the painting, and the dry patches we left with the water now start to look like shafts of light between the storm clouds.

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You can use a water sprayer as you move towards the bottom of the painting, but keep the board at the same angle throughout.

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This is how the stormy sky is developing, all those ‘happy accidents’ appearing before your very eyes !

Once you have reached the bottom of the painting, sitting your board flat will stop the movement. Now dry the painting with your hairdryer on slow speed, ensuring that the tape stays stuck or it will ‘cockle’ making your framers job almost impossible.

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You can see the shaft of light coming from between the clouds in close up now. As you can see, this colour granulates, as will Ultramarine Blue. I love this about both this colour and the rough texture of the paper I use.

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All that’s needed is a simple silhouette towards the bottom of the painting, leaving some highlights where the shaft of sun is catching the right hand side of the lighthouse, and hey presto, you have a stormy painting.

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I hope you found that helpful.

PLEASE FEEL FREE TO SHARE, COMMENT, LIKE AND SUBSCRIBE

You can find more tutorials on my youtube channel, just click on this link

CLICK HERE TO SEE MY OTHER VIDEO TUTORIALS

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There is a whole chapter on painting skies in my free e-book ‘Watercolours for Beginners’ to read or download it please click on the link below

Comments
  1. Hello, Martin. For some reason, my computer is not displaying any of the photos apart from the bowl of paint. Any suggestions? I’d love to see the step by step!

    • artstevo says:

      Hi Karin,
      Thanks for taking the time to comment.
      A few days ago I was tidying up my pc and the photos on wordpress.
      It looks like I either moved them to another location, or deleted them. I still have the photos so will try and correct it in the next few days, as am busy teaching at the moment.
      I’ll message you again when it’s sorted.
      Martin

    • artstevo says:

      Hi Karin,
      Sorry it’s taken a while but I have now corrected my stormy skies blog.
      Martin

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