When it snows, she has no fear for her household; for all of them are clothed in scarlet. — Proverbs 31:21

Snow in Israel? It happens. There are mountains there and all that has to happen for snow to fall is for the temperatures to drop enough and have a weather system pass over. I googled the question and found that it happens every few years. Theoretically, even the area of northern California where I live could see snow if it got cold enough when a storm system came through.

This verse seems to go back to the theme of preparation. The virtuous woman has oil for her lamps, spins thread from flax to make clothes, and her family has scarlet garments for those rare occasions when snow would happen. Purely speculating on my part, having scarlet cloth would require that whatever cloth that was dyed could hold that color (she would have to know about mordents) and she would have to have enough of whatever was used to make the dye. This means lots of crimson worms or madder red which would have been quite expensive. Scarlet garments were used for the High Priest in Israel and anyone with clothing that color would have to be quite well-off.

Another benefit of having her family clothed in scarlet would be that they could be seen in a blowing snowstorm with white out conditions. In a world where clothes were frequently whatever color the wool/flax/linen were, her family would stand out and perhaps be able to be found.