An extratropical cyclone advances over Brasil this Friday, May 22, 2026. The formation brings a mass of polar air that drops temperatures in several regions. Quem lives in Sul and has already felt the effects since the beginning of the day.
The combination of the system with cold air should bring minimum temperatures close to 0°C in areas of Rio Grande, Sul, Santa Catarina and Paraná. Chuvas strong storms accompany the advance. Especialistas monitor displacement to avoid major surprises.
Polar Massa arrives with force to the country’s Sul
The air of polar origin has gained strength and has already knocked down the thermometers in Rio Grande of Sul, Santa Catarina and Paraná. In some mountain cities, brands can reach negative values during the early hours of the morning.
Isso increases the risk of frost at higher points. Motoristas need to pay extra attention on roads with possible ice formation. Defesa Civil guides the population on basic care.
- Verificar if windows and doors are tightly closed
- Evitar leaving the house unprotected during the coldest mornings
- Manter coats and blankets within reach
- Checar the state of the gutters before heavy rain
- Evitar the use of electrical equipment in wet areas
Instability also favors an increase in winds. Moderate to strong Rajadas occur in several parts of the region.
Strong Chuvas advances through Centro-Sul
The extratropical cyclone favors the return of rain to Paraná and Mato Grosso from Sul. The first showers were already forming this Friday morning. In the west and center of Paraná, precipitation is accompanied by thunderstorms.
Santa Catarina records instability in the northwest and in areas close to the capital. Volume can be high in short periods. Florianópolis faces moderate risk of flooding in neighborhoods like Rio Tavares and Itacorubi. The high tide intensified by the cyclone contributes to this.
Em São Paulo, Minas Gerais and Rio of Janeiro, minimum temperatures vary between 9°C and 16°C in the first hours. Thermal contrast generates localized instabilities.
Riscos of flooding and impacts in the capital of Santa Catarina
Defesa Civil of Santa Catarina maintains constant monitoring. The moderate risk of flooding requires special attention at low points. Equipes are preparing to act if the volume of rain exceeds expectations.
Moradores from vulnerable areas received preventive guidance. The agency recommends avoiding unnecessary travel during peak rains.
The extratropical cyclone is not expected to cause extreme effects such as cyclonic winds, but the combination with the cold front maintains the alert for isolated storms. Significant Acumulados occurs in localized bands.
Previsão for the weekend indicates continuation of the cold
Temperatures remain low in Sul during Saturday and Sunday. The polar mass persists and keeps the air cold. Geadas are likely in mountain and plateau regions.
No Centro-South, the rains decrease in intensity, but the weather remains unstable. The sun may appear at times, but with frequent clouds.
Técnicos assess that the system will gradually move away at the beginning of next week. Até there, the cold continues to prevail in the early mornings.
Recomendações from Defesa Civil to the population
Autoridades reinforce simple measures to face the period. The population must prioritize safety at home and on the road.
- Evitar travel through flooded streets or with currents
- Não leaving children or elderly people exposed to intense cold
- Desligar electrical appliances in case of severe storms
- Acompanhar official weather reports
- Preparar emergency kit with flashlight, water and non-perishable food
- Verificar trees near homes that could fall in the wind
Meteorologia’s Instituto Nacional and regional services update forecasts in real time. Aplicativos and official websites help you keep track of changes.
The phenomenon highlights the variability of the climate at this time of year. Famílias on Sul separated warm clothes and blankets for the weekend. The extratropical cyclone reinforces the typical autumn pattern with rapid alternation between systems.