This is a Spider Lily (Lycoris radiata) They are stunning. They bloom in the fall September-October on tall sturdy stalks directly from the bulb. The spear-shaped leaves appear later and remain throughout the winter fading in about June when the heat tops 95 deg. These are truly garden divas. The color and the stark blooms sans any leaves show up as a surprise every year. Spider Lilies naturalize beautifully and I have spread them around my shade garden. They are relatively pest free and not picky about much. More sun and water and they bloom like crazy; less sun and water and they hang out looking much like liriope until conditions change.
Spider Lilies are hardy to zone 7 which makes this definitely a southern favorite and they often grow wild in the lower states.