Our "balmy" weather will come to an end this evening.
A cold front arriving from the west will drop temperatures by about 10 C by Shabbat morning.
The cold air will bring showers Friday into Shabbat.
Perhaps in the Purim spirit of rapid changes to our fortunes, temperatures will quickly warm ahead of the next storm system Shabbat afternoon which will arrive Motzei Shabbat/Purim night. This storm system should bring additional showers and chilly temperatures through the end of Shushan Purim in Jerusalem.
Temperatures should warm nicely thereafter, but the last week of March may bring more rain.