What is a wet snow?
Hi, everyone! I noticed there is a precipitation type called wet snow, as shown in the figure below. This is a new term for me. I'd like to ask what is a wet snow? What's the difference between normal snow and wet snow? How to predict wet snow in Windy?
Gkikas LGPZ Moderator last edited by
I copy from http://theweatherprediction.com/habyhints2/650/
"Wet snow is great for making snow balls and it is a sticky snow.
Dry snow is powdery, easily blown around by the wind and is not sticky."
I noticed there is no such wet snow in GFS model, so this is only contained in the ECMWF data?
As I searched the posts, I found your proposal which ask the windy developers do improve ECMWF meteogram by involving PTYPE Precipitation type (ID: 260015 GRIB2) and SF Snow fall (ID:144).
The description is here:
Describes the type of precipitation at the surface at the validity time. A precipitation type is assigned wherever there is a non-zero value of precipitation in the model output field (however small). The precipitation type should be used together with the precipitation rate to provide for example indication of potential freezing rain events. Precipitation type (0-8) uses WMO Code Table 4.201
Values of ptype defined in the IFS:
0 = No precipitation
1 = Rain
3 = Freezing rain (i.e. supercooled)
5 = Snow
6 = Wet snow (i.e. starting to melt)
7 = Mixture of rain and snow
8 = Ice pellets