from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Marked by overly cold and snowy conditions; blizzardlike.
- adj. Unclear, hazy, difficult to view.
blizzard + -ous (Wiktionary)
According to Ball-Kilbourne, volunteers have been working in the rain and cold, along with wind and blizzardous conditions, but it was all to save communities along the river.