Snow is quite rare in Jerusalem. Last night as the 24th of Shvat with all its promises of Hashem returning His presence to Jerusalem (read more here), was transitioning into the 25th, snow started to fall. Snow, according to the Sages is very special, specifically in Jerusalem. Snow, rain and dew are all connected to techiyat hametim, the revival of the dead.
For G-d's presence to return, we need the ruins of Jerusalem (specifically the Beit HaMikdash) and the House of David to be rebuild.
This morning I went to the archaeological site in Ramat Rachel, where you can see the ruins of the ancient palace belonging to the Davidic Dynasty. It is thought to be one of the summer palaces of the Judean Kings, closely dating to either Chizkiyahu (Hezekiah) or Yehoyakim (Johaikim).
Here is a little video where I elaborate more on the significance of the snow covering the ancient ruins.