All of us who have traveled in Israel and the surrounding countries are well-aware of the importance of the winter rains for the well-being of the inhabitants of the area, local agriculture, and the water supply in general.
If you wish to “keep up” on how the Sea/Lake of Galilee (the Kinneret) is doing a “fun” place to go is the Kinneret Bot where the water levels of the lake are reported frequently (especially when it has been raining).
In addition, the Israel Meteorological Service maintains a web page (available in Hebrew and English) where current conditions and weather forecasts are available. In the winter I find myself looking at the home page, the three day forecast, and also at the “Rain Forecast Maps.” I the summer I tend to look at the “Heat Stress” tab under “Observations” (what is the HS at the Kinneret? Masada?@#!).