Atlantic Convergence Zone (ZCAS)

Parameter	Description
Pressure	Surface low over southeastern Brazil
Precipitation	High variability of convective activity Heavy precipitation resulting in floods, particularly in southeastern Brazil Thunder in the convective parts of the system; more than 30 flashes/m²
Wind	Strong gusts around thunderclouds
Other Relevant information	Duration typically 3-8 days High variability of convective activity


Figure 1: Mean daily summertime (December-February) precipitation calculated with a grid length of 2º lat/long (shaded area) and 850hPa wind vectors.	Figure 2: Typical weather events within a SACZ: thunderstorms, moderate and light showers.