Argentina is in the grip of a sharp cold snap as a mass of Antarctic air pushes north after reaching Patagonia on Tuesday and spreading across the rest of the country.

Dubbed a “polar bomb” by local media, the cold air mass will send temperatures in Buenos Aires down to a low of 1°C on Thursday and Friday, with highs of just 10°C and 11°C, respectively, according to the National Meteorological Service (SMN, by its Spanish initials).

The first half of the week already brought the first cold spell of the winter to the capital, with minimum temperatures ranging between 3°C and 5°C and highs hovering around 14°C from Monday through Wednesday, similar to last Sunday.

“June is coming to a close as a mass of Antarctic air moves across much of Patagonia before spreading to the rest of the country,” meteorologist Ignacio López Amorín said in a weather update posted by the SMN on social media published on Tuesday.

López Amorín said Ushuaia, Argentina’s southernmost city, saw heavy snowfall, with a wind chill of -6°C and southerly winds of up to 50 kilometers per hour.