On the afternoon of last Sunday, December 18th 2016, thermodynamic conditions lead to several convective systems in the Sao Paulo state. Thundestorms in São Paulo, Campinas, Guarulhos and Campos de Jordão, among other localities, lead to strong wind gusts and hail occurrence.
 |
| Hail observed in Jardim dos Oliveiras, Campinas (SP) |
 |
| Hail observed in Jardim dos Oliveiras, Campinas (SP) |
 |
| Hail observed in Vila Georgina, Campinas (SP) |
The several convective systems, including the storms formed in the aforementioned locations, can be seen in the CAPPI 3km from Radar São Roque (source CPTEC).
The VIL images from the same radar allows for a greater discrimination in the severity of the different events. In particular, high VIL values can be seen between 17:00 and 17:40 in the north of São Paulo city, near Campinas and Campos de Jordão, and between 18:00 and 19:20 in Guarulhos and in some regions of the Vale do Paraiba.
The following images show the EchoTop 20dBz values.
The incidence of lightning flashes detected by the Brasildat network within an area of 180 km centered in Campinas, SP, increased abruptly starting at 17:00 GMT. Yet, some flashes were detected towards the east of Campinas as early as 15:30 GMT
The evolution of the different systems can also be observed in the enhanced GOES IR images for the Southeast (source: CPTEC).
The following images are from the GOES13 Vis channel (source CPTEC)
The following images are from the GOES13 WV channel (source CPTEC)
A second part of this case study, with images for December 19th, can be found here.
No comments:
Post a Comment