[gradsusr] Generating Ensemble Probabilities Based on Conditional Threshold(s)

[Perry, Aaron]

Good Afternoon,

I am trying to use the GFS Ensemble to generate probabilities based on conditional thresholds and am running into some trouble.

Initially, I have tried to generate an ensemble mean of the probability of 0.01" of QPF in 3-hourly time increments.

See attached GrADS script (gefs_p01.gs) and the control file (gefs.ctl) that I am using.

I am receiving the following error messages:

Operation error:  Invalid dimension environment
  Looping dimension does not vary
result is Operation error:  Invalid dimension environment
  Looping dimension does not vary

What am I doing wrong here?

Best,

Aaron Perry
Meteorologist
Class of '16
Northern Vermont University-Lyndon
(formerly Lyndon State College)
Boston, Mass.
Twitter: @AaronPerryWx<https://twitter.com/AaronPerryWx><https://twitter.com/arnpry><https://twitter.com/AaronPerryWx>
Email: Aaron.Perry at lyndonstate.edu<http://Aaron.Perry@lyndonstate.edu/>
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