WeatherExtreme Forecast Discussion 8/14/2017 0435Z

Some short wave energy propagating across Argentina Monday and Tuesday with rain or snow showers, shifting upper level winds from westerly to southwesterly with the passage. Winds shift back to westerly late Tuesday night and early Wednesday as the most intense short wave exits to the Atlantic and a warm front comes in from the Pacific. Late Thursday a positive tilt trough with a weak trailing cold front comes onshore bringing light rain or snow flurries. The storm occludes and passes slowly north of El Calafate over the weekend. Another storm may bring heavier rain early next week.

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