What type of weather accompanies a high pressure system

But why? The answer has to do with the typical air flow around high and low pressure. Physically, it seems to make sense to have air flow from high pressure to low pressure. The opposite occurs with high pressure. The surface flow is accompanied by the opposite behavior at upper levels of the atmosphere, as depicted in this schematic diagram:. Want to take the next step? So, when the barometer is rising expect fair weather, decreased cloudiness, possible reduced visibility, reduced air quality, calmer winds, and clear skies.

You may also want to learn more by checking out how to read a barometer. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile.

Select personalised ads. Apply market research to generate audience insights. Measure content performance. Humidity is the amount of water vapor in the air. What is relative humidity? Relative humidity is the ratio of water vapor contained in the air compared to the maximum amount of moisture that the air can hold at that specific temperature and pressure.

Humans are very sensitive to humidity, as the skin relies on the air to get rid of moisture. The process of sweating is your body's attempt to keep cool and maintain its current temperature.

If the air is at percent relative humidity, sweat will not evaporate into the air. As a result, we feel much hotter than the actual temperature when the relative humidity is high.

What is an air mass? An air mass is an extremely large body of air whose properties of temperature and moisture content humidity , at any given altitude, are fairly similar in any horizontal direction. Air masses can cover large hundreds of miles areas. Air masses can control the weather for a relatively long time period: from a period of days, to months. Most weather occurs along the periphery of these air masses at boundaries called fronts. There are 4 general air mass classifications categorized according to the source region: polar, tropical, continental and marine.

Polar latitudes P - located poleward of 60 degrees north and south. Tropical latitudes T - located within about 25 degrees of the equator.