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  2. Low-pressure area - Wikipedia

    en.wikipedia.org/wiki/Low-pressure_area

    In meteorology, a low-pressure area, low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. It is the opposite of a high-pressure area . Low-pressure areas are commonly associated with inclement weather (such as cloudy, windy, with possible rain or storms), [ 1 ] while high-pressure areas are ...

  3. Cyclone - Wikipedia

    en.wikipedia.org/wiki/Cyclone

    An extratropical cyclone is a synoptic scale low-pressure weather system that does not have tropical characteristics, [33] as it is connected with fronts and horizontal gradients (rather than vertical) in temperature and dew point otherwise known as "baroclinic zones". [34] "Extratropical" is applied to cyclones outside the tropics, in the ...

  4. Tropical cyclone intensity scales - Wikipedia

    en.wikipedia.org/wiki/Tropical_cyclone_intensity...

    Within the region a tropical cyclone is defined as being a non-frontal low-pressure system of synoptic scale that develops over warm waters, with a definite organized wind circulation and 10-minute sustained wind speeds of 34 kn (63 km/h; 39 mph) or greater near the centre. [28]

  5. Mesovortex - Wikipedia

    en.wikipedia.org/wiki/Mesovortex

    A mesovortex is a small-scale rotational feature found in a convective storm, such as a quasi-linear convective system (QLCS, i.e. squall line), a supercell, or the eyewall of a tropical cyclone. [1] [2] Mesovortices range in diameter from tens of miles to a mile or less [3] and can be immensely intense.

  6. Pressure system - Wikipedia

    en.wikipedia.org/wiki/Pressure_system

    A low-pressure area is a region where the atmospheric pressure at sea level is below that of surrounding locations. Low-pressure systems form under areas of wind divergence that occur in the upper levels of the troposphere. [1] The formation process of a low-pressure area is known as cyclogenesis. [2]

  7. Thousands evacuated as cyclone builds off India and Pakistan ...

    www.aol.com/news/rains-lash-india-pakistan...

    The army was also involved in relief efforts in the state which was hit in last year by cyclone Biparjoy, damaging infrastructure and leading to the evacuation of more than 180,000 people.

  8. Extratropical cyclone - Wikipedia

    en.wikipedia.org/wiki/Extratropical_cyclone

    The low pressure system eventually loses its warm core and becomes a cold-core system. [ 19 ] [ 17 ] The peak time of subtropical cyclogenesis (the midpoint of this transition) in the North Atlantic is in the months of September and October, when the difference between the temperature of the air aloft and the sea surface temperature is the ...

  9. Thousands evacuated, schools shut as India, Pakistan brace ...

    www.aol.com/news/schools-pakistans-karachi...

    KARACHI/AHMEDABAD (Reuters) -Coastal towns and cities in India and Pakistan braced for a rare August cyclone on Friday, as heavy rains and winds forced authorities to close schools and evacuate ...