How accurate are the ECMWF total new snow forecasts? at 3 days? 10days? Has anyone evaluated these. I find them fascinating, with maximum I have seen at 543 cm in 10 days on the SE mountains of Greenland. The Andes also have been collecting 2-3 meters of snow in many of these forecasts from June to December. If these are valid, then perhaps we are rebuilding the glaciers?? I watch these forecasts every day. These maximum amounts are also quite sensitive to elevations and appear below the resolution of a 9 km dx model.

]]>https://community.windy.com/topic/5300/total-snow-accumulation-forecastsRSS for NodeSat, 18 Apr 2026 16:53:19 GMTSat, 20 Jan 2018 14:54:59 GMT60@davematthews
for further reading (about ECMWF)
https://www.ecmwf.int/en/forecasts/quality-our-forecasts

]]>https://community.windy.com/post/9904https://community.windy.com/post/9904Wed, 24 Jan 2018 12:52:12 GMT@davematthews
It is a very good research question for a PhD thesis !

]]>https://community.windy.com/post/9903https://community.windy.com/post/9903Wed, 24 Jan 2018 12:44:49 GMTHOW DOES THE SNOW depth and density verify with observations?

]]>https://community.windy.com/post/9895https://community.windy.com/post/9895Tue, 23 Jan 2018 20:03:53 GMT@davematthews
The snow accumulation is not accurate when it’s too close to the rain/now limit. It is often overrated. For very cold region, I it’s may better.
In the Alps we have commonly 2-3 m of snow above 2000-3000m and more, but the glaciers are still melting. What is needed to « rebuild » them, is lower annual mean temperatures. Snow accumulation is one parameter to have glaciers, but the second is a shorter melting season.

]]>https://community.windy.com/post/9839https://community.windy.com/post/9839Sat, 20 Jan 2018 18:28:37 GMT