AWIPS Tips: Create Objective Analysis Plots

AWIPS Tips

Welcome back to AWIPS Tips! This week we are looking into creating an objective analysis plot in CAVE by loading both model data and current observations. The display/time options are a bit tricky to set up initially, but once you’ve created the plot, you can save it as a display to easily reload it.

Before we load our first product, let’s configure the Display and Time properties. Select Options > Display Properties and change the Load Mode to Forecast match. Then toggle on Options > Time Options.

Set Load Mode to Forecast Match and enable Time Options
Set Load Mode to Forecast Match and enable Time Options

Next we’re going to load some model data. Open the Volume Browser (Models > Volume Browser) and select the following:

  • Display Type: Plan view
  • Loop Type: Time
  • Sources: RAP13
  • Fields:
    • Hgt/Pressure > Height
    • Wind > Wind (Total)
    • Vorticity > (Absolute Vorticity)
  • Planes: Pres > 500mb

Select Load and a window will appear with a list of valid times. Scroll through to find the latest forecast run at the 0HR and select OK.

TIP: If you are having trouble finding the time, select a Valid Time and start typing the time you are looking for.

If you scroll back and forth in time, you will notice the 0HR forecast is plotted for the previous X number of runs (instead of normally getting each forecast hour from the latest run).

Resource Stack depicting previous runs
Resource Stack

Next, you can load a satellite product, for example the Satellite > GOES-East CONUS > Mid-level Water Vapor IR Band (Ch 9).

By hold-right-clicking on the product in the Resource Stack, you can modify the density, colors, line types, etc. to configure your plot to your liking. See a demo of this here.

Once you have your plot the way you like it, you can save it as a procedure or display to easily bring it up in the future!

Final objective analysis plot
Final objective analysis plot

Check back in two weeks for the next blog post, where we will explore using the WarnGen tool.

To view archived blogs, visit the AWIPS Tips blog tag, and get notified of the latest updates from the AWIPS team by signing up for the AWIPS mailing list. Questions or suggestions for the team on future topics? Let us know at support-awips@unidata.ucar.edu

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