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Dear Michelle and Rebecca and everyone 

Thank you so much for the very informative article . Is there a re-analysis database that allows multi-year re-analysis of snowfall or water equivalence of snowfall that permits multi-year re-analysis simultaneously for the rest of the world other than the USA, Like southern Europe and the Mediterranean region . For example I used your below valuable service at https://psl.noaa.gov/data/atmoswrit/map/ to reconstruct flood risks using the multi-year list which exceeded 30 analogous months and it worked well but snow water equivalence of snow is not active for re-analysis under any of ( ERA5, ERA5-interim, JRA5, MERRA..) .

I am simply looking for any database that permits snowfall re-analysis if you kindly have an advice . 

To explain my methods employed : The list of analogous approximate years/months ( n=35) were suggested by an ANN and cluster analysis as possible analogs for 2023-2024 autumn-winter that I have conducted personally , this list was yielded using multivariable analogous years analyses utilizing Long time-series metric values of  ( MEI and ON1 ENSO, QBO, MJO, PDO, AMO, AO, NAO, EA-WR , MOi and WeMOi oscillation, LOD, IOD, SST nino regions,  and some other relevant physical phenomena forcing factors) . The list of years was very efficient at predicting severe weather and flood risks for the last three seasons me trying to assess the skill of the method . 

Do you kindly have any suggested service/advice allowing multiyear analysis for snowfall or water equivalence of snow ? I am lost with databases that did not work to be honest .

NB: I am approaching these data statistically and my work is a statistical programmer .Also Any theoretical /climatic relevance or suggestions on my approach is highly appreciated. 

Thank you so much by all results and outcomes

Mohammad Alkhateeb

The Hashemite Kingdom of Jordan