Winter Severity Index is a cold wave/synth wave project headed by Simona Ferrucci, singer, arranger and multi-instrumentalist ( voice,guitar, bass guitar, synths and drum machine programming). 
The project was born in 2009 as a traditional female band with drums, bass, synths and guitar. After the decision of two members of the band to leave, WSI continued as a duo with Simona on guitars and with Valentina Fanigliulo , a.k.a. Mushy, on synths. Then in 2013 she started the collaboration with Alessandra Romeo on synths until July 2024, when WSI became a solo project.

The music of Winter Severity Index is marked out by an original mixture of different influences, from synth wave of the Eighties to the guitar shoegaze sound of the Nineties, plus some hint of trip hop and vaporwave. During the years the sound evolved and enriched their features, preserving however a  melancholic dark mood.

From 2011 the project played in more than one hundred venues all over Europe, taking part in important festivals such as the Wave Gothic Treffen in Leipzig, the Substance Festival in Los Angeles, and performed in important locations for contemporary art, such as MAXXI Museum in Rome and Studio Hrdinů in Prague, in the Národní Galerie. 
WSI shared the stage with great artists of the international cold wave scene from The Chameleons UK, to Lene Lovich, from Tropic of Cancer to Lebanon Hanover and so on, receiving agreements from the international press and web magazines. The project participated also to important radio transmission for RAI in Italy and Radio 3 in Spain.

The third album by Winter Severity Index , called DISGELO, has benn released by Manic Depression/Icy Cold and Blood Rock Records in February 2022.


Discography (partial): 

2010 - Winter Severity Index , EP, self produced, CDr, distributed by AF Music.
2013 - Survival rate, EP, Blood Rock Records, vinyl.
2014 -  Slanting Ray, LP, Blood Rock Records + Manic Depression Records, double vinyl and CD.
2016 - Human Taxonomy, LP, Manic Depression Records, vinyl and CD.
2017 - Katabasis, LP compilation, Manic Depression Records, CD.
2018 - Slanting ray, second press, LP, Blood Rock Records + Manic Depression Records, double  vinyl and CD.
2022-DISGELO,Manic Depression Records, Icy Cold Records, Blood Rock Records, vinyl and CD. 

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