advance notice; omen; premonition
Refers to a sign, warning, or notification given beforehand, whether literal (a formal notice) or figurative (a foreboding sign).
He suddenly visited without any advance notice.
The dark clouds were an omen of the storm.
Compound of 前 (まえ, 'before') and 知らせ (しらせ, 'notice, notification'). The reading じらせ is a rendaku form of しらせ.