The forecast. The rain. Every grid cell.

Precipitation, checked.

Reading the verified city network…

City / station Accumulation Window ending Forecast lead

Loading native precipitation grids…

Amounts above are the native grid cells nearest the station. Their footprints differ; verification below compares matching areas and time windows.

Forecast precipitation

Cell totals 50-mile ringDisplay

Select a cell to inspect its total.

Ryan’s precipitation table · inches

Actual native footprints. Liquid-equivalent precipitation, including melted snow and ice. Dry cells retain the basemap; missing cells are gray.

Did the forecast get the rain right?Verify against

Area-mean forecast—

Area-mean analysis—

Mean absolute error—

Wet / dry bias—

RMSE—

Matched area—

Forecasts must have been available before the window began. All scores use complete, matching accumulation windows.

At the station and nearbyStation, county and state scores ↗

Preparing circular neighborhood verification…

A window on the rainCompleted windows and the available NDFD outlook

At this grid cell

Every number has a source.

How the grids are compared

URMA and Stage IV are precipitation analyses and can be revised. They share upstream information. Grid verification is distinct from the accepted station observations used elsewhere in Forecast Scores.