Dear all,

I am having some issues with ERA5 snowfall data set. The units are m of water equivalent, which is the same to say is 1000 kg/m2.

I need snowfall in m. I know somewhere I need to multiply/divide by a snowfall density or something. I tried to use snow density but values are very poor when compared to obs, which made me think I should use the constant for fresh snow density which is 100. Comparisons were slightly better, but still way off.

Any ideas/suggestions are greatly appreciated

Many Thanks

Joana

**To convert snow depth in m of water equivalent to actual snow depth you need to do**

**actual_snow_depth_in_m = RW*SD/RSN**

*where*:

SD= snow depth in m of water equivalent (parameter 141.128)

RW, density of water, = 1000 kg/m3

RSN = density of snow in kg/m3 (parameter 33.128)

For snowfall (which is accumulated during the forecast period), you would need to have the snowfall density to do the conversion. I am not sure if this information is available.

If not you can retrieve accumulated snow fall during the forecast by using snow depth differences (between time steps).

Thank you

J