Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 11 · Rain, Kurma Chakra, Utpata
वृष्टिः कूर्मचक्रम् उत्पाताश्च
तदातिवर्षणं भूरि प्रावृट्काले बलोज्झिते ।आसप्तमर्क्षशशिनः परिवेशगतोत्तरा ॥ ७३४ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 734.
Then there is very heavy rain in the rainy season, when it is without strength. Say a halo surrounds the Moon up to the 7th star, on the north...
Simple meaning: Venus in the 7th from Jupiter brings very heavy rain. A halo around the Moon is the next sign.
विद्युत्प्रपूर्णमंडूकास्वनावृष्टिर्भवेत्तदा ।
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.