Seasonality and climate modes influence the temporal clustering of unique atmospheric rivers in the Western U.S.

Atmospheric rivers (ARs) are narrow corridors of intense water vapor transport, shaping precipitation, floods, and economies. Temporal clustering of ARs tripled losses compared to isolated events, yet the reasons behind this clustering remain unclear. AR orientation further modulates hydrological impacts through terrain interaction.

Recent and future changes in extreme rainfall in the Catskills region of New York.

Recent flooding events in the Catskills such as Tropical Storm Irene have raised concerns regarding changes in the frequency of heavy rainfall. The extreme precipitation records of four long-term observing sites are analyzed based on two measures of heavy rainfall. The number of events that produce ≥50.