After the intense, abundant and stable rains this week, a meteorological event is approaching the country that will leave new rainfall over the national territoryand which has led to a series of notices not only from the Chilean Meteorological Directorate (DMC) but also in preventive early warnings of SENAPRED.
The official national meteorology agency issued—and even updated—a weather warning for probable thunderstorms in sectors of three regions of the country. The institution indicates that the postfrontal instability would be responsible for producing the phenomenon in the regions of Valparaíso, O’Higgins and also on the Maule.
Capricious segregated low brings new rains to central Chile this weekend
As indicated by the DMC in its notice A172-1/2024, the probable thunderstorms would occur on the coastal zone and of the Coastal Range of the Valparaiso Region and also of O’Higginswhile in the Maule Region The phenomenon could only occur in the coastal section region of.
The phenomenon of electric storms It is more likely to occur between the night of this Saturday, May 25, and the early morning of Sunday, May 26.
The warning issued by the Chilean Meteorological Directorate has led the National Disaster Prevention and Response Service (SENAPRED) to issue preventive early warnings for the regions that will be affected by the forecast meteorological phenomenon.
The areas with preventive early warnings by SENAPRED are the following:
| Region | Scope | Phenomenon that causes the alert |
|---|---|---|
| Valparaiso Region | Viña del Mar, Quilpué, Villa Alemana, Los Andes, San Esteban and Putaendo | weather event |
| O’Higgins Region | regional | electric storms |
| Maule Region | Vichuquén, Licantén, Curepto, Constitución, Pelluhue and Chanco | electric storms |
| Early warnings issued or updated by SENAPRED in the event of a predicted meteorological phenomenon. | ||
It should be noted that preventive early warnings will be in force until the conditions of the event so warrant.
Meteored forecast update
As we have already been warning the community in our forecasts, the approach of a segregated low to the country during this weekend It would leave shower-type precipitation and options for thunderstorms—and even hail—in some sectors of the central zone of Chile.
This segregated leave had been associated with a front system that advanced through the country, but was weakened thanks to the presence of high prostfrontal pressure, which was installed off the coast of the central zone, after the systems that left more than 100 mm of rain in some sectors of the country, during the recent week.
The most recent updates of our reference model They tell us that the area affected by rainfall —which will occur with the passage of segregated leave— has been expanded, extending them from the Valparaíso Region and to Biobío.
Segregated lows are very dynamic phenomena, so they change their direction, intensity and areas on which they will affect as they approach the continent.
The data of the ECMWF model They tell us that the showers will be recorded with greater intensity on the Valparaíso regions (coastline, coastal mountain range), on the coast of O’Higgins and Maule at night time this Saturday the 25th. Already in the early hours of Sunday the 26th, more intense showers are expected over the western sector and also in the foothills of the Metropolitan region.
About the regions of Ñuble and Biobío, the segregated low will leave abundant cloudiness and scattered weak showers (between 0.5 and 2 mm). Predicted rainfall amounts between the regions of Valparaíso and Maule will vary between 5 and 15mm.
Sources and references of the news:
– Meteorological Directorate of Chile: Notice A172-1/2024.
– SENAPRED: Alerts.
