Funnel-type rain gauge

Sheltered rain gauges reduce problems with wind.

A radar installation. The radar dish is located within the white dome.

Radio waves are sent out by a transmitter, and the reflected signal returns to the dish for analysis. The movement of objects can be measured by changes in the radio waves.

The current US weather radar netork. Coverage is not as good as depicted here due to blockage of the radar by buildings, trees, and terrain.

Conditions for sleet (ice pellet) formation.

Example of a precipitation analysis that uses radar data.


Washington state topography.


Washington state average annual precipitation.


Washington state ecological zones.