Our rain gauges actually read in millimeters. One millimeter is equal to 0.03937 inches, which rounds up to 0.04 inches.
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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.
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.
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.