OC: Portland’s winter 2026 vs. the previous 88 winters

**Data:** NOAA daily temperature data from the Global Historical Climatology Network (GHCN) for the Portland International Airport weather station (PDX), covering winters from 1937–2026 (Dec. 1–Feb. 28).
**Tools:** Data downloaded from NOAA, cleaned and analyzed in a spreadsheet, then visualized with custom HTML/JavaScript charts.