The portable modular tornado and hurricane survival shelter kit can be quickly constructed, even by a single individual, or left assembled. The shelter provides for shielding people and animals from flying debris, the most frequently injurious danger in severe storms. The shelter's construction is understandable quickly, even to the novice, therein further providing for quick construction. The base slots that hold the flexed arcs differ one to the next so that no confusion between arc A members and overlapping arc B members exists in assembly. Modularity is key element, as various sizes are needed to accommodate varying numbers of occupants. Only differing bases need be used to alter overall human capacity as arc A members and arc B members can continue innumerably by varying only the base length. The shelter is inexpensive in order to be deployed to a plurality of imaginable application sites. Schools are but one example.