Pima County does not warrant the accuracy of this map, and no decision involving a risk of economic loss or physical injury should be made from the data available on this site. This map was created solely for the convenience of the County and related public agencies. PCRFCD has no control over the accuracy and type of data transmitted. Some data on this map come from sources other than Pima County Regional Flood Control District (PCRFCD). Data displayed on this map are provisional data that have not been checked or verified for accuracy.Warnings shown on this page are distilled from the base set to include flash flood warnings, flood warnings, tornado warnings, severe weather statements, and severe thunderstorm warnings. Text warnings from the National Weather Service are available at: ( ). For National Weather Service Warnings, click on the border of a warning polygon to display the text for that warning.Forecast images are based on the Weather Researach Forecasting (WRF) numerical weather prediction model operated by the Department of Hydrology and Atmospheric Science at the University of Arizona (Click Here More Information).Quantitative Precipitation Estimates (QPE) (labeled as “Prior Day Precipitation Estimate” in the Map Layer Tab) are based on MRMS QPE data with local gauge bias correction. over 24 hours) more than once per year over. The MRMS system was developed by the National Severe Storm Laboratory (NSSL) to assist in producing severe weather forecasts and warnings, hydrologic-, aviation-, and numerical-weather-predictions. Figure 18: Ozone exceedance days have fallen in Maricopa County since the early 2000s, when the county regularly. Radar images are base reflectivity images from data compiled as part of NOAA’s Multi-Radar/Multi-Sensor System (MRMS) ( ).Use the Info Menu (Links section) to obtain tabular precipitation (by area) or streamflow (by watercourse) data. Daily Storm Summary provides the summary of 24 hours precipitation, daily maximum stage and discharges obtained from Pima County’s alert sensors for the selected dates. Use the Info Menu (Links Section) to open the Daily Storm Summary table. Use the Layers menu to turn on/off County Boundaries, Watercourses, Watersheds and National Weather Service (NWS) Warnings imagery. Use the Datasets Menu to change rainfall period or select streamflow or weather data. This site provides current precipitation, stream, and weather information for Pima County.
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