NWS Launches Rapid Refresh Forecast System
NOAA's new forecasting system extends lead times and replaces several aging regional models across North America.
Updated on Nov. 5, 2026 in Forecasts
The National Weather Service implemented the Rapid Refresh Forecast System on November 3, replacing a set of aging regional forecast systems. RRFS extends forecast lead time for the contiguous United States to seven days, compared to four days for the HRRR.
Why it matters
The system combines hourly updates with a continental domain, giving forecasters broader coverage across the United States and neighboring countries. NOAA will discontinue several legacy models as RRFS goes operational.
RRFS offers a seven-day lead time for the contiguous United States, up from four days under the HRRR, and includes an on-demand 1.5-kilometer grid for smaller phenomena. RRFS-SD predicts smoke and dust over an 18 to 84 hour window, though the extraction does not state its accuracy.
The players
National Weather Service
The National Weather Service is the NOAA agency responsible for issuing weather forecasts and warnings across the United States.
NOAA
The National Oceanic and Atmospheric Administration is the federal agency overseeing U.S. weather, climate and ocean research and forecasting.
The details
RRFS integrates the hourly updates of the High Resolution Rapid Refresh Model with the larger continental domain of the North American Mesoscale model. It covers Alaska, Hawaii, Puerto Rico, Canada, Mexico, Central America and the Caribbean, and includes RRFS-SD, NOAA's first high-resolution smoke and dust model to transition to NWS operations.
Timeline
November 3, 2026: NWS implements the Rapid Refresh Forecast System.
Seasonal Patterns
RRFS extends the HRRR's hourly-update approach to a seven-day lead time, up from four days, across the contiguous United States. The change builds on the HRRR's existing short-range forecasting by adding longer-range coverage and a continental domain.
Residents in Alaska, Hawaii, Puerto Rico and the contiguous United States may see forecasts extending to seven days as RRFS rolls out. Readers should check local National Weather Service forecasts for updated outlooks.
The takeaway
A seven-day forecast horizon gives readers more lead time to plan for weather events, and the RRFS integrated system is designed to cover the continent in one model. Checking updated National Weather Service forecasts will reflect these improvements.
Further reading
Explore more on the Forecasts section for context on how these models are used.
Source note: This article includes information reported by Noaa.
