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low-pressure area - wikipedia

Low-pressure area - Wikipedia

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2019-6-14 · A low-pressure area, low, depression or cyclone is a region on the topographic map where the atmospheric pressure is lower than that of surrounding locations. Low-pressure systems form under areas of wind divergence that occur in the upper levels of the troposphere. The formation process of a low-pressure area is known as cyclogenesis. Within

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air pressure and how it affects the weather - …

Air Pressure and How It Affects the Weather - …

Equatorial low-pressure trough: This area is in the Earth's equatorial region (0 to 10 degrees north and south) and is composed of warm, light, ascending, and converging air. Because the converging air is wet and full of excess energy, it expands and cools as it rises, creating the clouds and heavy rainfall that are prominent throughout the area.

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high and low pressure | weatherworks

High and Low Pressure | WeatherWorks

2019-6-16 · If you are a regular viewer of weather broadcasts, chances are you’ve heard the following from your local TV meteorologist: “plenty of sunshine is in store today as high pressure is in control over the area.” Or: “expect rain to spread into the area as a low pressure system approaches.” It is well established that high

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understanding low blood pressure - webmd

Understanding Low Blood Pressure - WebMD

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Low Blood Pressure - When Blood Pressure Is Too Low

2016-10-31 · How low is too low for blood pressure? Within certain limits, the lower your blood pressure reading is, the better. There is also no specific number at which day-to-day blood pressure is considered too low, as long as none of the symptoms of trouble are present.

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low blood pressure (hypotension) - symptoms and …

Low blood pressure (hypotension) - Symptoms and …

Low blood pressure on standing up (orthostatic, or postural, hypotension). This is a sudden drop in blood pressure when you stand up from a sitting position or after lying down. Gravity causes blood to pool in your legs when you stand. Ordinarily, your body compensates by increasing your heart rate and constricting blood vessels, thereby

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high and low pressure - met office

High and low pressure - Met Office

2019-6-16 · High and low pressure systems cause the day-to-day changes in our weather. In this article we look at how they are defined and how they form. The Earth's atmosphere exerts a pressure on the surface. Pressure is measured in hectoPascals (hPa), also called millibars. Standard pressure at …

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why does it rain when the pressure is low? | sciencing

Why Does it Rain When the Pressure Is Low? | Sciencing

Perhaps you've heard meteorologists warn of an approaching low pressure system, followed by a prediction for rain. That's no coincidence; where low pressure goes rain is often sure to follow, as the lowest pressure allows air to rise until it condenses, and the water vapor within it falls as rain.

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low blood pressure (hypotension) - medicinenet

Low Blood Pressure (Hypotension) - MedicineNet

2017-10-14 · Low blood pressure or hypotension is a condition in which blood pressure becomes so low that the blood flow to the organs in the body, which causes symptoms like dizziness, fainting, nausea, vomiting, and chest pain. Common causes are heart disease, medications, and dehydration. Treatment for hypotension depends upon the patients health.

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what is a low pressure area in meteorology? - …

What is a Low Pressure Area in Meteorology? - …

When you see the red capital letter "L" on a weather map, you're looking at a symbolic representation of a low-pressure area (or "low"). A "low" is an area where air pressure is lower than it is in other areas surrounding it. As a general rule of thumb, lows have a pressure of …

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