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en.wikipedia.org/wiki/Pressure_system

A pressure system is a relative peak or lull in the sea level pressure distribution. The surface pressure at sea level varies minimally, with the lowest value measured 87 kilopascals (26 inHg) and the highest recorded 108.57 kilopascals (32.06 inHg).

www.thoughtco.com/weather-in-high-pressure-systems-3444142

Weather in a high-pressure system is usually drier. As the sinking air increases in pressure and temperature, the number of clouds in the sky decreases leaving less chance for precipitation. Some avid fishermen even swear by a rising barometer to get their best catches!

ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/fcst/tmps/hl.rxml

High and Low Pressure Centers on forecasted temperatures The positions of high and low pressure centers can greatly influence a forecast. Fair weather generally accompanies a high pressure center and winds flow clockwise around a high. This means that winds on the back (western) side of the high are generally from a southerly direction and typically mean warmer temperatures.

www.slb.com/.../high_pressure_high_temperature.aspx

Challenges in high-pressure oil, high-temperature gas Attractive new prospects like deepwater high-pressure wells in the Gulf of Mexico, the commercial viability of previously uneconomic gas plays, and the increasing use of thermal recovery techniques has dramatically increased the requirement for HPHT technology.

sciencing.com/weather-occurs-during-high-pressure-system...

High pressure refers to a temporary buildup of air near the Earth's surface, caused by converging winds at high altitude that send colder air sinking. During times of high air pressure the weather tends to be fair and clear, with few or no clouds and thus no rain, although there may be wind.

www.thoughtco.com/low-and-high-pressure-1434434

Air pressure is not uniform across the planet, however. The normal range of the Earth's air pressure is from 980 MB to 1,050 MB. These differences are the result of low and high air pressure systems, which are caused by unequal heating across the Earth's surface and the pressure gradient force.

www.glossary.oilfield.slb.com/.../high-pressure_high-temperature.aspx

Pertaining to wells that are hotter or higher pressure than most. The term came into use upon the release of the Cullen report on the Piper Alpha platform disaster in the UK sector of the North Sea, along with the contemporaneous loss of the Ocean Odyssey semisubmersible drilling vessel in Scottish jurisdictional waters. In the UK, HPHT is formally defined as a well having an undisturbed ...

www.genesisoilandgas.com/Expertise/High-Pressure-High-Temperature

High-pressure, high-temperature (HPHT) requirements can impact all aspects of production operations and design. Genesis has the expertise and experience to meet these requirements. HPHT developments are typically defined as having a reservoir pressure > 690 bara and temperature >150 o C.

www.hpac.com/heating/design-high-temperature-hot-water...

The system pressure usually is set approximately 25 psi above the saturation pressure of the operating temperature. System pressure is critical to prevent water from flashing to steam and to avoid pump cavitation. The main advantages of HTHW systems over steam systems are larger system temperature differentials and fuel savings.

www.weatherworksinc.com/high-low-pressure

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