Well, freak springtime snowstorms can and do happen in Colorado occasionally and the fact that it happened right after the massacre makes it a purely coincidental event. At least, that is how your average person would rationalize it. However, my feeling is that the weather was a kind of spiritual-prophetical reflection of this dark event that befell not only Littleton but the world and global consciousness.
In a way, the boys even sort of willed or wished any sign of snow away so that they could carry out their destructive mission successfully.
The boys begin discussing how “fucking snow is gay” and that they “hope the shit clears out by Tuesday, actually Sunday.” Eric says he needs “dry weather for my fires.”
And they got their wish: clear skies, sunshine and warm weather on the morning of April the 20th. The following day, as the victims’ bodies were processed by the crime scene investigators and taken from the building, the weather began to turn mercurial; the skies grew ominous and dark. The boys were last to leave the building. As they were carried out from Columbine, concealed by tents, a massive snowstorm began to fall unrelenting. The boys kept the snow at bay until they had been physically extricated from the source of their discontent. It was like frozen tears of tragedy. The weather was once deceivingly nice and fair but in the blink of an eye, an icy cold storm fell like a sorrowful blanket on Littleton. A wintery spell of darkness had begun, almost like a kind of curse with a ripple-effect which would burgeon others on in the name of it for many years to come.