Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 11 · Rain, Kurma Chakra, Utpata
वृष्टिः कूर्मचक्रम् उत्पाताश्च
वमंत्यग्निं तथा धूमं स्नेहं रक्तं पयो जलम् ।अधोमुखाधितिष्ठंति स्थानात्स्थानं व्रजंति च ॥ ७४७ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 747.
...vomit fire, smoke, oil, blood, milk or water, stand head down, or move from place to place.
Simple meaning: Images that spit fire, smoke, oil, blood, milk or water, or stand upside down, are portents.
एवमाद्या हि दृश्यंते विकाराः प्रतिमासु च ।
Such changes in images, a city of Gandharvas in the sky and stars seen by day are portents.
महोल्कापतनं काष्ठतृणरक्तप्रवर्षणम् ।
A big meteor, a rain of wood, grass or blood, smoke in the directions and earthquakes are portents.
अनग्नौ च स्फुलिंगाश्च ज्वलनं च विनेंधनम् ।
Sparks without fire, burning without fuel, a rainbow and a frog at night, and a white crow on a peak are portents.