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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 general, the passage of cold fronts is more common in the south than in the north, and occurs more in winter than in summer. [109] The movement of warm, subtropical air into the region occurs frequently in summer up to 46 o S. [ 109 ] When warm subtropical air arrives in the region, the air is dry, resulting in little precipitation, and ...
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 ...
Continental tropical air masses are extremely hot and dry. [7] Arctic, Antarctic, and polar air masses are cold. The qualities of arctic air are developed over ice and snow-covered ground. Arctic air is deeply cold, colder than polar air masses. Arctic air can be shallow in the summer, and rapidly modify as it moves equatorward. [8]
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.
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.
Typically, air temperature rises throughout the day and peaks in the afternoon. But on a Miami summer night, the air temperature might drop to the low 80s but humidity and the amount of water in ...
Mean temperatures have increased by 0.5 °C (0.90 °F) from 1901–2012, which is slightly lower than the global average. [1] Temperatures in the Andean part of Patagonia have increased by more than 1 °C (1.80 °F), which has caused the retreat of almost all of the glaciers.