Alert for rising rivers in Rio Grande do Sul

Accumulated rain has already exceeded the normal September average in most areas of Rio Grande do Sul. Rivers are at high levels and the forecast is for more rain until Thursday.

The week will be characterized by heavy rains in Rio Grande do Sul. Until the night of Tuesday 12 September, areas of rain spread across the state due to the advance of a cold front, in addition to the entry of warm and humid air currents coming from the North to the South of Brazil.

Dots in red, orange and black indicate denser clouds, with thunderstorm potential (Image: GOES 16)

Further rain is expected between Wednesday and Thursday 14 September, but this time the areas of instability will be caused by process of formation of a new cold front and an extratropical cyclone.

This new extratropical cyclone will form near the coast of Rio Grande do Sul and contribute to the appearance of moderate to strong winds and the concentration of rain in the east and northeast of the eastern part of the state during Thursday.

1 month of rain in a few days

With a large amount of rain having already fallen on Rio Grande do Sul since the beginning of September, rivers, creeks and creeks have high levels. The ground is soaked and no longer has the capacity to absorb all the rain expected in the coming days.

The Civil Protection of Rio Grande do Sul warned this Monday that the situation constitutes an alarm for the state. Between September 11th and 15th, accumulations may vary between 100 and 200 mm in the southern half, center, south-east, east and north-east of Rio Grande do Sul. But in some places in the countryside, the missions, the south, the center and the north-east, the Civil Protection warns that the volume of rain accumulated up to the 15th could exceed 250 mm.

A the situation is very worrying because by September 8, most areas of Rio Grande do Sul had already received more rain than normal for the entire month of September.

In southern Rio Grande do Sul, for example, rainfall volumes of between 100 and 200 mm represent more than the normal average September rainfall.

In addition to the heavy rain, the Civil Protection of Rio Grande do Sul warns of the high risk of thunderstorms with hail and strong gusts of windthat is, bad weather conditions in much of the state of Rio Grande do Sul.

Rivers on alert

The hydrological condition in the main rivers of Rio Grande do Sul is high levelswith the Ibirapuitã, Santa Maria, Ibicuí, Uruguai and Jacuí rivers in elevationand the others in stability or decline.

Alert in the Missions and in the southern half of the RS

Due to the forecast of voluminous rainfall, initially, for the Missões region and the southern half of the state, a high hydrological response is expected in the rivers of this region, with the occurrence of gradual flooding, flash flooding and inundation where the rain has a high intensity (high volume in

In short).

Therefore it is indicated WARNING Condition for the Piratinim, Butuí-Icamaquã, Ibicuí, Quaraí, Santa Maria, Negro, Vacacaí-Vacacaí Mirim, Baixo Jacuí, Camaquã, Mirim-São Gonçalo basins.

Alert in the river basins of the North-East and East of the RS

As precipitation spreads to the rest of the state, with larger volumes toward the Northeast and East, hydrologic responses are expected in these regions, with Ppossibility of flash flooding in smaller rivers AND gradual flooding in larger rivers.

Therefore, the condition of ALERT for the Apuaê-Inhandava, Taquari-Antas, Caí, Sinos, Gravataí, Mampituba and Tramandaí basins.

Follow updates on RS Civil Protection warnings on the Climatempo website. They are highlighted in the red bars at the top of the site.

Source: Terra

Rose

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