Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 11 · Rain, Kurma Chakra, Utpata
वृष्टिः कूर्मचक्रम् उत्पाताश्च
विद्युत्प्रपूर्णमंडूकास्वनावृष्टिर्भवेत्तदा ।यदाप्रत्यङ्नता मेघाः खसप्तोपरि संस्थिताः ॥ ७३५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 735.
...full of lightning, with frogs croaking. Then there is rain. Clouds may lean to the west and stand high, above seventy. (Our text is unclear here: what the seventy counts.)
Simple meaning: A Moon halo with lightning and croaking frogs brings rain. Clouds leaning west come next.
पतंति दक्षिणस्था येभवेद्वृष्टिस्तदाचिरात् ।
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.