As to the color of caterpillars, you might be interested in the folklore of the woolly worm, whose brown and black bands are said to predict the coming winter’s severity: http://www.almanac.com/content/woolly-bear-caterpillars-and-weather-prediction
As to salt, weather lore says that it increases in weight before a shower. There is also a similar excerpt in an old weather lore book that says: “A farmer’s wife says when her cheese salt is soft, it will rain; when getting dry, fair weather may be expected.”
As to the color of caterpillars, you might be interested in the folklore of the woolly worm, whose brown and black bands are said to predict the coming winter’s severity: http://www.almanac.com/content/woolly-bear-caterpillars-and-weather-prediction
As to salt, weather lore says that it increases in weight before a shower. There is also a similar excerpt in an old weather lore book that says: “A farmer’s wife says when her cheese salt is soft, it will rain; when getting dry, fair weather may be expected.”
Hope this helps!