When venturing out on any body of water it is wise to always check the weather. But as we all know, the reports are not all that reliable for boaters, and most weather forecasts are for a very broad area and may not be specific to your cause. So, it is a good idea to look for signs of bad weather coming. The following are portions of an excerpt from Chapman’s Piloting:

First, identify the cloud form in the sky and note if they are increasing or decreasing in size, and if they are lowering or lifting.

 Thickening and lowering of cloud layers is a sign of approaching bad weather. On the other hand, when clouds show signs of evaporation, when holes or openings appear in the layer, or when altocumulus layers are frayed and indistinct at the edges, that is an indication of improving weather, or at least, a delay in oncoming foul weather.

Another trick used by pilots: if the wind is coming from the left of your heading (port tack for sailors), you are heading for inclement weather.

If the wind is coming form the right of your heading (starboard tack for sailors), you are going toward improved weather.

Note the sequence of cloud forms over the past few hours. Cirrus clouds are usually the advance agents of approaching extra-tropical cyclone, especially if they are followed by a layer of cirrostratus.

So, keep your eye on the sky and enjoy safe boating.