A severe storm with wind and hail hit the municipality of Giruá, in the northwest of Rio Grande do Sul, around 10pm on Wednesday, and caused a lot of damage. According to an official report from local authorities, the storm caused one death and left more than 50 people injured.
The Giruá Fire Department confirmed that 57 people were injured in the city as a result of the violent storm and were treated by SAMU and the local hospital. Two had to be removed to neighboring cities for treatment, one in serious condition.
The windstorm caused the collapse of a gymnasium with courts while people were playing sports there, leaving several injured and people under the rubble of the roof that collapsed due to the force of the gusts.
The severe storm also left houses destroyed, poles down, trees toppled by the wind and roofs on homes and sheds ripped off by the force of the gale. Many trees fell on the road on roads in the region, such as RS-344, on the access to the municipality of Giruá.
Satellite images recorded the formation of the storm that hit the municipality of Giruá. The storm appeared over the Argentine province of Misiones, where between 8 pm and 9 pm very heavy clouds formed on the Argentine side of the border.
Between 9 pm and 10 pm, in the hour before the storm in the northwestern municipality of Rio Grande do Sul, the instability exploded in size with the few heavy clouds that were in the Argentine province of Misiones giving way to a cluster of storm clouds known as the Convective Complex Mesoscale (CCM).
Between 10pm on Wednesday and 1am this Thursday, the cluster of heavy clouds gained even more strength and moved from West to East across the Northern Half of Rio Grande do Sul, still with intense rain, hail and gales.
The following sequence of images from the GOES-16 meteorological satellite shows the hour-by-hour records between the beginning of the storm system in the early evening of Wednesday over Argentina and its mature phase in southern Brazil in the early hours of this Thursday- fair.
Since there was a broad area of storms, characteristic of a mesoscale convective system, the area affected by storms was wide. This meant that more cities were also affected by wind storms and hail in the Northern Half of Rio Grande do Sul, from the Northwest of Rio Grande do Sul to the Paranhana Valley.
These storm cloud cluster formations are not uncommon. Every year they occur mainly between Northeast Argentina, Paraguay and Southern Brazil in the hot spring and summer months, especially under conditions of a hot, humid and very unstable atmosphere.
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The post first appeared on metsul.com