PacIOOS’ Weather Research and Forecasting (WRF) model provides a 6-day, hourly forecast of rainfall rate (the amount of rain that would fall over the course of an hour). Rainfall can be categorized as light (< 0.1 in/h) (< 2.5 mm/h), medium (0.1-0.3 in/h) (2.5-7.6 mm/h), heavy (> 0.3 in/h) (> 7.6 mm/h), or violent (> 2.0 in/h) (> 50 mm/h). This forecast covers the region surrounding the main Hawaiian Islands at approximately 6-km (3.7-mile) resolution. The forecast is run daily and gets updated on this website between 1:30 PM and 2:30 PM Hawaiʻi Standard Time (UTC-10) every afternoon.