Weekend Stormy Impacts Increasing for Mid-Atlantic Coast
09/25/2026, 1:54 pm EDT
Climate Impact Company Week 2-4 Outlook
South America
Issued: Tuesday September 29, 2026
Highlight: Southeast Brazil rain/Argentina shifts wetter/cooler.
Charts of the day: Soil moisture ranking and 7-day rainfall observations.
Discussion: Soil moisture conditions trend wetter across Argentina to Southeast Brazil and drier than normal to the north for much of Brazil. The 7-day rainfall observations yield no rain in Northern Argentina with lack of rain for Northern Brazil while a generally wet regime affected Southeast Brazil to Northeast Argentina.
Week-2 Ahead (October 11-18, 2026): Widening wet weather/cooler Argentina. Southeast Brazil rains (also) expand.
Discussion: Upper trough stretched across Northern Argentina produces two expansive areas of rainfall including western and southern Argentina plus expanding Southeast Brazil. Argentina is cooler than normal.
Week-3 Ahead (October 18-25, 2026): Staying wet Southeast Brazil.
Discussion: Upper trough pattern in Argentina remains shifting slightly southward. The Argentina cool regime continues, and Southeast Brazil rains are heavier.
Week-4 Ahead (October 25-November 1, 2026): Hotter north of the Southeast Brazil rains.
Discussion: Brazil shifts hotter (and drier) although Southeast Brazil stays wet. West/Central Argentina stay wet/cool.