The actual frontal system in Chilewhich has had everything from heavy rain to strong gusts of wind in different regions of the country, has brought the term to light again zero isotherm.
And precisely that has been able to be read and heard in the different weather forecasts published during the last few days.
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In fact, it is directly related to the snow than on Tuesday the 7th started to fall over the Metropolitan region and in very specific sectors of the mountain and foothill area of Santiagoas is the case of Farellones.
What’s more, there was even talk of the possibility of extending the same to the communes of Las Condes, La Reina, Lo Barnechea, Peñalolén and La Florida.
What is the zero isotherm and what is its relationship with snow?
In simple terms, according to Chilean Meteorological Directorate (DMC)the zero isotherm means the imaginary line in height at which the air temperature reaches 0 degrees.
The latter means that at that point is when the Precipitation in the form of water becomes solid snow or sleet. And although it is frequently talked about, this constantly varies.
Taking these points into consideration, when talking about a low zero isotherm there is a greater chance that the foothills or the valleys will be covered in white.
Now, the risk can come with a high zero isotherm which implies liquid precipitation from the mountainous area and which could finally mean alluviums, landslides or increases in river flows due to the amount of water that rushes down the inclined surfaces.
According to reports of this week’s phenomenon in the capital, Zero isotherm would be between 1,000 and 1,500 meters of altitudetherefore at points that reach this figure is where the climatological event would occur first.
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