[ncl-talk] mashing together multiple precip category variables into 1 variable

[Micah Sklut]

Hi,

Using GFS data, there are 4 different precipitation category variables:
rain, freezing rain, ice, snow

Each of these variables has a boolean 0 or 1 value for each grid point. I'd
like to combine these 4 variables into 1 variable, such that each grid
point has a value of:
no precip = 0
rain = 1
freezing rain = 2
ice = 3
snow = 4

Is looping through all of the grid points in space and time, the approach
that needs to be taken here? Or is there a more efficient NCL function
approach that can be taken?

Thanks,

-- 
Micah Sklut
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