Short-Range Peak Graphic Sections: Export Options | Legend Displays | Excedance Table | Archive Utility | Custom Thresholds The short-range peak graphics display both the short-term deterministic streamflow forecast along with probability information from the HEFS ensemble streamflow forecasts. It is the default plot that is displayed when an ensemble forecast location is selected from the map on the CNRFC homepage. It can also be accessed for a given location by clicking on the top left button above where graphics are displayed. These graphics are interactive and contain quite a few features. This document will go over all of them. Time series and graphic export options Below are two ways to download data from the plot. The red box in the upper right provides a link to raw ensemble streamflow time series in csv format when the 5-character ID is clicked. The red box in the lower right of the graphic highlights two download options related to what is actively displayed in the graphic. You can download an image of the current information displayed in the graphic or you can download all the time series that are currently displayed in the graphic. Legend Displays The legend in the bottom right corner is interactive. The user can turn features on and off by checking the boxes associated with each feature. The ensemble traces and the mean of all the traces are turned off by default, and the deterministic forecast and probability bands are turned on. Notice there is also an information button in the legend ( Exceedance Table The exceedance table in the upper right-hand corner provides a list of river stages/flows and their associated probability of being exceeded for the entire forecast window that is actively being viewed in the graphic. If the forecast location has an established monitor and/or flood level, the probability exceedance will be highlighted by a line in the table with the exceedance probability labeled - a red line for flood stage, and an orange line for monitor stage. In the example below, the zoom window is 5 days, and the associated probability of exceedance for flood stage is 73% in the table. The range of stages in the table span from 9.44 to 12.74 feet. When zooming into a tighter time window, you will see the values in the table change dynamically. When we zoom into a window of roughly a day in the example below, you can see the flood stage exceedance changed from 73% to 54%, and the range of stages changes in the table are now 10.68 to 9.27 feet (see image below). Archive Utility Below the interactive graphic there is a Verification/Historical Plots section where a user can select a forecast date and time. When the user selects a date and hits the "Fetch" button, the interactive graphic will update with the information from that date. The legend will also have an observed option for comparison to the forecast information. Above the interactive graphic will be a yellow banner indicating that this current graphic is not the latest forecast, and provides a link back to the current forecast. Custom Thresholds The user also has the capability to enter thresholds other than monitor and flood stage. When adding this information, the threshold will show up both in the plot and the summary exceedance table. The user can enter the threshold (either stage or flow) by clicking the link below the Chance of River Level Exceedance (or Chance of Flow Exceedance) table: |