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In this region, which occupies most of the Pampas, cold air from Patagonia meets warm, humid air from Brazil with dry air coming from the Andes. [158] When these air masses collide, they can produce intense storms, frequently becoming supercells that can produce tornadoes. [158]
In contrast, cold waves are also common, owing to the Andes channeling cold air from the south, allowing cold fronts to come frequently during the winter months, causing cool to cold temperatures with temperatures that can fall below freezing. [85] [86] Temperatures can dip below −10 to −30 °C (14 to −22 °F) at the higher altitudes. [77]
These warm air masses can bring sunny weather, particularly during the afternoon when they come from the north or northwest as a result of a trough located in central Argentina. [7] On the other hand, warm air masses from Brazil bring humid conditions, featuring high humidity with high cloud cover that is typical of a warm front of a frontal ...
Cold air from the south can bring cooler temperatures while hot humid air from the north brings hot temperatures. [49] The city receives 1,257.6 mm (50 in) of precipitation per year. [50] Because of its geomorphology along with an inadequate drainage network, the city is highly vulnerable to flooding during periods of heavy rainfall. [61] [62 ...
The coldest spots usually register temperatures between -20 °C and -25 °C during cold waves, and the official record is -33.9 °C in Chubut province. However, some towns claim to have had records of around -35 °C. Summer frost is common everywhere except for the northern coast, and even sleet and light snow can fall during the warm season.
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Central Argentina has hot summers with tornadoes and thunderstorms (in western Argentina producing some of the world's largest hail), and cool winters. The southern regions have warm summers and cold winters with heavy snowfall, especially in mountainous zones. Higher elevations at all latitudes experience cooler conditions.
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