1)
What is the great matter that they will see?
1.
Rashi: Just like I can change the seasons through my Tefilah, so if war would confront you, my Tefilah had power to stop the enemy. You did not need to request a king in my lifetime, even though I am old!
2.
Radak citing his father: Rain never falls in Eretz Yisrael the entire time of the harvest
