The four-winter cluster and its aftermath
A comparison of event frequency, size and concentration, followed by the later drought diagnostic.
130 CLIMATE YEARS / OCT 1895 — SEP 2025
Snow, water,
across 130 years.
An interactive account of daily weather, events, dry intervals and shifting reference climates in the Harrisburg ThreadEx composite.
Explore each climate year
A year begins October 1 and ends September 30; snow seasons run October–May.