This image of GPS precipitable water is created from delays taken
from the California Real-time Network (CRTN) and averaged over the
previous hour, with pressures and temperatures calculated from hourly
13-km Rapid Update Cycle analysis. Sites that are not currently
available have "-999" as their value. This image is experimental and
may not always be up-to-date, therefore, USE WITH CAUTION!!

This work has been funded by a Blasker Environmental Grant from the San
Diego Foundation, we thank them for their support.