2021.05.04 - HEC-MetVue v3.1.0 Beta is included in the official CWMS 3.2.2 release. 

New Features:

MetVue 3.1.0 Beta

    • Default Value Option for Forecast Map Panels: Default Value option is available for the CAVI-MetVue forecast Map Panel selection, in particular to automatically generate zero-value forecast precipitation grids for the no future precipitation alternative.
    • Missing Data Filling: For missing gridded data gaps in the observed or forecast time windows, HEC-MetVue will fill missing gaps through a constant value or interpolated values, depending on the data type and conditions of missing period.  For PER-CUM data types, a zero-value grid(s) will be used to fill the missing period.  For INST-VAL and PER-AVER data types:
      • If the missing period has valid grids at the start and end of the missing period, linear interpolation will be applied. 
      • If the missing period extends through the end of the observed period’s time window, the value of the last available grid will be duplicated and carried forward to fill in the remainder of the observed period. Same treatment applies for the forecast period.
      • If the missing period starts from the start of the observed period, the first available grid will be duplicated and carried backwards to fill in the gap through the start of the observed period. The same treatment applies for the forecast period.
    • Pre-defined Temporal Transformation Patterns: The HEC-MetVue Temporal Transformation Tool now includes a number of pre-defined temporal transformation options for the most commonly used patterns, in particular options for peaked temporal transformation patterns at the start, center, or end of the time interval.
    • New input data time window controls: The CAVI-MetVue Model Alternative’s input data reading time window can now be modified through a negative time offset relative to the Start Time of the Lookback Period and a positive time offset relative to the Time of Forecast.  This feature can be used to extend the CAVI-MetVue time window of data processing beyond the duration of the CAVI Forecast Simulation’s time window, especially in support of using HEC-HMS’s Hamon Evapotranspiration method, which requires additional temperature data one day before the start time and one day after the end time of the simulation.  The new CAVI-MetVue Alternative input data time window controls feature can also be used to limit the outlook of forecast precipitation to be used in HEC-MetVue computations.  When a 7-Day QPF is linked to the CAVI-MetVue model alternative but only the first day of the QPF is intended to be used in the forecast simulation, setting a +1 Day offset from the Time of Forecast would make the CAVI-MetVue model alternative compute only the first day of the QPF and apply zero-value precipitation grids for the remainder of the forecast.
    • Preprocessing of CAVI-MetVue Alternative’s Input Data: Preprocessing of input gridded datasets will occur automatically when either data filling is necessary for missing grids, or time interval transformation is required, or both.  This will also allow for more flexibility in setting the forecast time window, for which the start time of the simulation and the time of forecast no longer have to coincide with the times of input data such as SWE (which registers at 0600 GMT every day) and QPF (which registers at 0000/0600/1200/1800 time intervals).
    • Auto-creation of CAVI-MetVue Alternative’s output map panel(s): The CAVI-MetVue Model alternative now automatically creates HEC-MetVue Map Panels for output datasets, such as an output dataset that consists of the combination of observed and forecast precipitation.  Automatically generated output map panels are named based on the user-specified name in the CAVI-MetVue Model Alternative’s Output Tab plus the Model Alternative’s Key string appended with parenthesis.

Known Issues:

MetVue 3.1.0 Beta

    • Default Program Order: When modifying the CAVI’s default program order to include HEC-MetVue, sometimes HEC-MetVue does not appear in the CAVI’s Model Alterative Keys Editor. When that situation occurs, shutting down the CAVI then restarting it will refresh the CAVI’s Model Alterative Keys Editor to include HEC-MetVue in the list of available models.
    • Missing Data:  For non-INST-VAL datsasets, missing data at the start of the lookback or the time of forecast will cause CAVI-MetVue alternative compute to fail. If it is not possible to correct the missing data issue in the source database, the forecast simulation time window’s start of the lookback and/or the time of forecast should be modified to coincide with times for which data is available.
    • CAVI-MetVue Map Layers: In the CAVI Forecast Run tree, the HEC-MetVue Model Alternative’s status of Map Panels sometimes fails to update. In addition, the corresponding HEC-MetVue results map layers (e.g. contour layer and basin average images) do not display in the CAVI’s forecast simulation’s Map Window.  When encountering those situations, the following options can help update the status of the HEC-MetVue Map Panels and corresponding image displays in the CAVI’s Forecast Simulation’s Map Window:
      • In the CAVI Forecast Run tree, click on the CAVI-MetVue Model Alternative’s node, then click on the HEC-MetVue Map Panel node. If that does not force the update, edit the CAVI-MetVue alternative and poke any setting then press OK to close the editor.
      • In the CAVI Forecast Simulation’s Map Window, zoom in and out for the HEC-MetVue results maps to reappear.
    • Obsolete Map Panels: If the output dataset in the CAVI-MetVue alternative is renamed, a new HEC-MetVue output Map Panel will get created and used in the forecast. That will leave an obsolete and harmless output Map Panel which can be deleted to remove the extra clutter in the HEC-MetVue session.