Why is a blizzard severe?

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Tags

1. #expected
2. #heavy
3. #service
4. #national
5. #required
6. #dangerous
7. #often
8. #severe
9. #combination
10. #these
11. #winter
12. #storms
13. #snowfalls
14. #blizzards
15. #resulting
16. #warning
17. #accompany
18. #while
19. #conditions
20. #blizzard
21. #visibilities
22. #blowing
23. #weather
24. #issue