Warning: This page is currently being upgraded!

Some capabilities have been removed due to technical and/or aesthetic reasons.
Maximum temperature, minimum temperature, and normal precipitation climatology maps will be added to the interface at a later date.
Please click a point on the map to receive the information in the data display frame.

This webpage was developed in conjunction with the Weather Forecast Office in Pendleton, Oregon (WFO PDT).

Many thanks to the staff there for developing the prototype and assisting in the transition to CPC.

FAQ

What climatologies are used in this display?

PRISM (Parameter-elevation Regressions on Independent Slopes Model) normals are used in this display. PRISM data are inherently available as monthly values. For precipitation, monthly total precipitation normals are totaled over the course of the 3-month period, for a given lead, to get seasonal total precipitation normals (e.g. seasonal precipitation normals for December-February will be the accumulation of the monthly total precipitation normals for December, January, and February). For temperatures, monthly average maximum/minimum temperature normals are averaged over the course of the 3-month period, for a given lead (e.g. seasonal average maximum/minimum temperature normals for December-February will be the average of the monthly average maximum/minimum temperature normals for December, January, and February).

What color scheme is used?

The color scheme follows that of the static images for the Monthly forecasts and Seasonal forecasts.

What does the highlighting around the normal precipitation or normal maximum/minimum temperature imply?

The color used to highlight the normal values (precipitation or maximum/minimum temperature) are used to delineate the category of the forecast at the point clicked. If the selected point is within an area of enhanced odds for above-normal temperatures, the shading around the normal maximum/minimum temperature will appear red. If the selected point is within an area of enhanced odds for below-normal temperatures, the shading around the normal maximum/minimum temperature will appear blue. The same idea applies to the precipitation normal values, except enhanced odds for above- (below-) normal precipitation values are green (brown).