Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 11 · Rain, Kurma Chakra, Utpata
वृष्टिः कूर्मचक्रम् उत्पाताश्च
पतंति दक्षिणस्था येभवेद्वृष्टिस्तदाचिरात् ।नखैर्लिखन्तो मार्जाराश्चावनिं लोहसंयुते ॥ ६३६ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 736.
Then those clouds in the south come down, and rain comes soon. Cats scratch the ground with their claws, joined with iron. (Our text is unclear here: the words 'joined with iron'.)
Simple meaning: Clouds in the south coming down bring quick rain. Cats scratching the ground is a rain sign.
रथ्यायां सेतुबंधाः स्युर्बालानां वृष्टिहेतवः ।
Children building small dams in the street, broken lines of ants and many fireflies are signs of rain.
द्रुमादिरोहः सर्पाणां प्रीतिर्दुर्वृष्टिसूचकाः ।
Snakes climbing trees and a Sun or Moon of odd colour at rising and setting show bad rain.
मधुवर्णोऽतिवायुश्चेदतिवृष्टिर्भवेत्तदा ।
A honey-coloured Sun or Moon with strong wind brings heavy rain. Then the Kurma chakra begins.