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Data Resources for Assessing Drought in Utah


Maps useful in evaluating drought (% normal) 

Those highlighted with larger, italicized font are most strongly recommended for assessing drought conditions.

Precipitation *
Soil moisture *
Streamflow (current conditions, NRCS map)**,  Streamflow (current conditions, USGS map)

Streamflow forecasts (spring runoff forecasts, based on snowpack conditions) ***

Reservoirs (% normal for this time of year) ****


* from both SNOTEL and SCAN sites.  ** Note that in winter many small Utah streams freeze and can’t report data. This is also a monthly, not daily, product. Data are from USGS and other gaging locations.  *** same as previous except uses predicted streamflow from National Water & Climate Center. Only available during spring months.  **** This is a monthly, not daily, product. Data are from the BOR and other sources.

Additional notes about these maps: (1) Many adjustments can be made using the numerous “Map Controls” options on the right.  For example, you can view the basins alone without the stations on top by clicking the “Basin Conditions” (top). You can consider only those stations within a particular elevation band.  You can change the visualization, types of stations used, etc.  (2) All of the links above are set for current data. (3) These maps show a combination of individual station and watershed conditions as a percent of normal.  You can click on “value” instead to get the actual conditions in inches or other units. (4) These maps show the smallest watersheds available (HUC-8) but  can be modified to HUC-6, HUC-4, or HUC-2 for more regional views.

Additional (non-NRCS) map resources


Weather forecasting and outlook maps for Utah*​ 

6 to 10 Day Outlooks

Weather Forecast Office in Salt Lake City, UT and Grand Junction, CO

* from National Weather Service, Climate Prediction Center


NRCS water supply (drought) indices for Utah

  • SWSI (Surface Water Supply Index, available during spring months) 

  • WAI (Water Availability Index, available monthly, provided in the Climate and Water Reports)