Storm Data (current data) provides near real time and current daily rainfall accumulations from the Orange County Automated Local Evaluation in Real Time (ALERT) telemetry system rain gages. The real time storm data is automatically updated to the www.ocwatersheds.com Web site every 6 to 12 minutes. Daily accumulations of storm data for the previous one, two and three days are updated every morning at 8:00 AM. Note: Times are Pacific Standard Time.

Rainfall Data (past data) provides Orange County rainfall information for the latest storm event. The rainfall information is manually undated during and immediately following storms. Daily rainfall data accumulations for the current year are provided for three non-ALERT Orange County stations, Costa Mesa Station #219, Santa Ana Station #121, and Villa Park Dam Station #173, and one ALERT gage, Santiago Peak Station #156.

Hydrologic Data Reports are prepared annually and summarize hydrologic data from 66 ALERT rain gages, 47 recording, non-reporting rain gages, and 36 flood control, retarding basin and reservoir water level stations.

ALERT System (Automated Local Evaluation in Real Time) flood detection system consists of numerous automated rain gages, water level sensors, and computer base stations operated by California Counties in cooperation with the National Weather Service for real time monitoring of storm conditions via real time radio telemetry.

Weather Links provide sources of regional, state, and national weather information including; local weather radar images, short range weather forecasts, beach conditions, and river information. www.ocwatersheds.com doesn't take responsibility for the material or data provided by the outside links provided.