An ALERT Station is the physical structure, either a standpipe or small building, which houses ALERT sensors, such as a rain gauge, water-level gauge, weather sensors or a combination of all of these.
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Yes. Historical weather data, including rainfall and stream-flow information, which does not appear on this site can be provided directly by the District for a nominal fee to cover the cost of compilation and reproduction. Please call 602-506-8701 for more information.
Our rain gauges actually read in millimeters. One millimeter is equal to 0.03937 inches, which rounds up to 0.04 inches.
The density of rain gauges and the placement of individual gauges are based on a variety of factors, including: - District Projects in the Area - Environmental Restraints - Flood Hazard Potential - The Location of Channels - Permitting Requirements - The Proximity of Existing Gauges - Watershed Boundaries
Average Wind Speed sensors do not transmit the instantaneous wind velocity but rather an average wind speed over a time period. They will show a value of "0" or "Down" when there is little or no wind for a 6-hour period.
The water-year is used by the U.S. Geological Survey (USGS) and other federal agencies to define a period of data collection. It runs from October 1st through September 30th. For example, water-year 2006 began on October 1, 2005 and ended on September 30, 2006.