keep a weather eye open

An instruction to monitor someone or something, often because the person or thing in question may turn out to be dangerous. I think Tom's a thief, so keep a weather eye open around him. I'd keep a weather eye open with this storm that's brewing—we may have to evacuate.

Common Names:

Name	Pronounced	Usage
BÉBhinn	BAY-vin, BE-veen	Irish
Yima	-	Persian Mythology
Raharjo	rah-HAHR-jo	Indonesian, Javanese
Bairnsfather	['bɛənz.fa:ðə]
Gaubert	-	French
Tora	-	Swedish, Norwegian, Danish