Now therefore see the king whom you have chosen, and whom you have asked for: and, behold, Yahweh has set a king over you.
God confirmed the truth of Samuel’s words supernaturally when He sent rain during the wheat harvest, normally the driest period of the year. The rain symbolized the blessing of God for obedience (cf. Deuteronomy 28:12). This storm was a sign that Yahweh was supporting Samuel. However, coming at this time of the year, it proved to be judgmental, since farmers do not appreciate rain during harvests, and a warning of future potential judgment.