I would think in this weather the mouse will be more interested in looking for water than food so you might bait the trap with a small cap/lid full of water, hope she turns up soon.

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Mum to:
Sam & Lucy (human children)
Henrick (GSD)
Syd, Dizzy, Elvis(Cats)
Harvey, Mojo,Freckles, Nobby and Sugar(Mice)
Snakey-Lakey and friends(Fish)
Remy, Fidget, Rommel, Monty and Edd (dumbo rats)
Spike, Cordelia,Willow,Fred,Xander, Angel, Darla (hamsters)
A place in my heart will always belong to my babies at the bridge.