State Dashboard

Streamflow Conditions Map

The streamflow conditions map shows the streamflow conditions. Maps are available for real-time, daily, 7-, 14-, 28-days, and monthly average streamflows.

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Additional Information

Area-based Streamflow Map

The HUC-based map shows the streamflow conditions in areas. Maps are available for daily, 7-, 14-, 28-days, and monthly average streamflows.

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State Map

Show streamgages in a state. Click on a site to goto a site page

Streamflow Summary

The Average Streamflow Index, plotted as the red line on the above graphs, is calculated each day as the average of the streamflow index values for all the stream gaging stations in the state or water resource region having at least 30 years of record.

WaterWatch streamflow maps and click to go to WaterWatch

Cumulative Percent Summary

The cumulative percentage plot shows, for each day, the percentage of long-term (30 years or more of historical data) streamgages in each of the flow percentile classes listed in the Explanation. The plot is a graphical representation of the data in the Summary Table.

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Regional class summary

Summary of percentages of streamgages in each class for a region

Summary of the percentage of streamgages in each class
Region:Montana
Date:20241005
Low:1 %
Much below normal:22 %
Below normal:29 %
Normal:43 %
Above normal:4 %
Much above normal:0 %
High:1 %
No. of streamgages:140

Duration Hydrograph

Present a time-history runoff along with historical runoff percentiles.

Duration Hydrograph and click to view a large image with more options

Cumulative Runoff Hydrograph

Present a time-history cumulative runoff along with historical percentiles.

Duration Hydrograph and click to view a large image with more options

Comparison of Streamflow Maps

Compare two streamflow condition maps side-by-side

WaterWatch streamflow maps and click to go to WaterWatchWaterWatch streamflow maps and click to go to WaterWatch