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www.boat-ed.com/pennsylvania/studyGuide/Severe-Weather-and-How-to-Determine-the-Distance-of-an-Approaching-Thunderstorm/101039_101039206

A falling barometer indicates foul weather is approaching. Watch for wind direction shifts, which usually indicate a weather change. Watch for lightning and  ...

www.answers.com/Q/What_barometer_indicates_that_foul_weather_is_approaching

A falling pressure on the barometer indicates bad weather approaching, especially if falling rapidly.

www.boatingbasicsonline.com/content/general/5_3.htm

You should never leave the dock without first checking the local weather forecast ... just as important in planning your trip as checking for fuel and required equipment. ... Certain signs you can look for indicate an approaching weather change:.

www.reference.com/science/indications-foul-weather-e8c024cede5a116f

Indications of foul weather include a change in wind direction and speed due to low- or ... These are the traditional methods for detecting an approaching storm. ... are clumpy layers of clouds closer to the surface that indicate a storm is on the horizon. ... Before the invention of modern weather instruments, such as weather  ...

www.wilderness-survival-skills.com/how-to-predict-weather.html

Decreasing air pressure indicates the approach of a low pressure area, ... A barometer measures air pressure and is a well-known instrument to predict ... If it starts swirling and descending, the air pressure decreases and bad weather will be expected. ... If wet weather is approaching (3), the cloud will form a grayish veil.

www.thoughtco.com/weather-signs-of-incoming-storm-756025

Feb 18, 2017 ... Learn nine common signs that indicate your climbing weather is changing, including ... If you are in a few bad storms, pounded by rain, wind, and snow, then you realize how ... A halo around the moon indicates that a warm front is approaching but plan on at ... The History of Weather Measuring Instruments.

archive.hokulea.com/ike/hookele/weather_forecasting.html

The art of non-instrument weather forecasting can be used to confirm weather .... like hooks or commas indicate that a warm weather front is approaching, and that ... In some areas, these clouds foretell good weather; in others, bad weather.".

www.artofmanliness.com/2015/07/07/fair-or-foul-how-to-use-a-barometer

Jul 7, 2015 ... ... across the world, it predicts approaching weather by measuring changes in air pressure. ... In just a couple decades, the instrument became available to .... A barometer that is falling indicates that a low pressure system is ...

weatherstationary.com/pages/weather-for-kids-chapter-9-weather-instruments

Generally steady or rising pressure indicates fair weather while a falling pressure means a storm or foul weather is approaching. Barometers are the instruments ...

www.getmyboat.com/boating-how-to/297/how-to-predict-the-weather-at-sea

A shift in direction means a change in weather. ... Remember that winds can mean either an approach of good or bad weather, so watch for other signs to ... Approaching winds and double haloes are often heralds of stormy weather as well.