Heavy Rain and Wind Expected in Paraguay and Northern Argentina

Affected by a converging cyclone (Figure 1), it is expected that from April 22 to 25, regions including southeastern Bolivia, most of Paraguay, northern Argentina, and southwestern Brazil will experience moderate to heavy rain, moving from west to east. Specifically, the Upper Paraguay Department and Guairá Department in Paraguay, as well as the Formosa Province in Argentina, will see torrential rain, accompanied by intense convective weather such as short-duration heavy rainfall and thunderstorms with strong winds. The accumulated precipitation in most of these areas is anticipated to be between 20 and 50 millimeters, with some regions receiving 80 to 150 millimeters, and localized areas exceeding 250 millimeters. Additionally, influenced by the interaction of warm and cold air masses, southern Chile will also experience moderate to heavy rain, with localized torrential rain (Figure 2).

Figure 1 500 hPa Geopotential Height (Isopleths) and 850 hPa Wind Field (Wind Barbs) at 12:00 UTC, April 24, 2025

Figure 2 Forecasted Accumulated Precipitation from April 22-25, 2025 (Unit: mm)

Author: Hu Yingying                                 Reviewer: Zhou Ningfang 

English reviewer:Wang Yi                                                                       Issue approver:Dai Kan