Everything you've always wanted to know about Clocks

[lea.macleod at gmx.net]

No: HPFGUIDX 17421

Since I triggered the discussion about Harry´s watch by stating there 
are no muggle watches in HP, which was of course proved wrong right 
away, I´d like to put in another question.

At The Burrow, there is a clock with a hand for each member of the 
Weasley family, showing where or how they are: work, home, 
travelling... there is one section that says "mortal peril".

When the dark mark appeared at the Quidditch world cup, Mrs Weasley 
was in quite some state, actually thinking the other Weasleys might 
have been killed. She was clearly thinking there was a possibility 
that "the last thing she ever said to F and G was they didn´t get 
enough OWLs". 

Don´t you think she might have saved herself the trouble if she had 
taken one look on the clock and realised there was no danger?