Page Overview & Data Sources

This page is for viewing weather forecast maps from several operational numerical models. Select Forecast Model, Map Area, Variable, and Initialization from the pulldown menus above to view different forecasts. Use the Image Slider or playback controls to animate. See the list below for the forecast period, output interval, and initialization times available for each model. Except where noted, the forecast output grids are sourced from the NOAA Operational Model Archive and Distribution System. The map are made using NCAR Command Language (NCL).

NOAA Global Forecast System (GFS) [0.25°]
10/16-day forecast  |  3 or 6-hourly  |  00,06,12,18 UTC

ECMWF Integrated Forecast System (IFS) [0.25°]
15-day forecast  |  3 or 6-hourly  |  00,12 UTC
Source: European Centre for Medium-Range Weather Forecasts

ECMWF Artificial Intelligence Forecast System (AIFS) [0.25°]
15-day forecast  |  6-hourly  |  00,12 UTC
Source: European Centre for Medium-Range Weather Forecasts

North American Mesoscale (NAM) [12km]
3.5-day forecast  |  hourly  |  00,06,12,18 UTC

North American Mesoscale (NAM) [3km]
2.5-day forecast  |  hourly  |  00,06,12,18 UTC

North American Mesoscale - Alaska (NAM) [3km]
2.5-day forecast  |  hourly  |  12 UTC

High Resolution Rapid Refresh (HRRR) [3km]
18/36-hour forecast  |  hourly  |  00-21 UTC every 3 hours

High Resolution Rapid Refresh - Alaska (HRRR) [3km]
36-hour forecast  |  hourly  |  00,12,18 UTC

High Resolution Deterministic Prediction System (HRDPS) [2.5km]
48-hour forecast  |  hourly  |  00,12 UTC
Source: Meteological Services of Canada

National Blend of Models (NBM) [10km]
36-hour forecast  |  hourly  |  00,06,12,18 UTC

Air Quality Model (AQM) [4km]
48-hour forecast  |  hourly  |  06,12 UTC

Unrestricted Mesoscale Analysis (URMA) [2.5km]
1-day analysis  |  hourly  |  00 UTC

The forecast maps on this page are intended for educational purposes only. Refer to local and national agencies for guidance related to severe weather. U.S. residents are encouraged to vist weather.gov or the Storm Prediction Center of the NOAA National Weather Service.

Additional Information

• 2m Temperature refers to air temperature at 2 meters above the surface. 2m Temperature Anomaly refers to the departure of the current day (or hour) forecasted temperature from a long-term mean for the same day (and hour) of the year.

Last updated 23 September 2025