West-WRF Ensemble Forecast Tools

The West-WRF Ensemble is not currently running in real-time in an effort to improve the forecast skill through validation and verification. CW3E will resume real-time forecasting using the West-WRF Ensemble prior to the next cool season.

The products are provided “as is” and are intended for research purposes only (disclaimer). All products on this page are considered experimental.

Santa Ana Index

The Santa Ana (SA) Index predicts the strength of a SA wind event, which is a downslope wind common to Southern California. The methodology was produced by a team from San Diego Gas & Electric Company, combining surface pressure gradient, 825-hPa wind speed, and 825-hPa cold air advection. The SA Index is calculated below using the West-WRF ensemble output along multiple transects over Southern California.

More information about plots

Select a coastal and inland location below to display the SA Index for that transect.

Coastal Location:  

Inland Location: