How does DD know what Petunia/Vernon said?

[spookedook]

No: HPFGUIDX 156700

*Brothergib:
Having just been enjoying the discussion on Petunia and thinking
about 'Remember my last', I was reminded of a problem I had with
the  entire scene. It has probably been discussed previously, and if
so  please direct me in the right direction;

 How does DD know that Petunia/Vernon is about to throw Harry out
of  the house?

 <<snip>>

 So how is it that DD knows what Vernon/Petunia have just said and
then managed to produce an instantaneous Howler to prevent it. We
have DD's comment that he has watched Harry more closely than he
knows, but we know that DD is at the ministry, so I don't think
the 'DD in animagus form' theory would work here.

 Fawkes? Patronus? Something else?

*Tinktonks:
I think we must assume that Mundungus apparated to tell DD exactly
what had happened. DD being as wise as he is was probably very well
aware what kind of effect this would have on the Dursleys and send
this reminder on that basis. I suppose it was just dramatic timing
that meant that the howler was received at the exact time Vernon was
trying to throw Harry out!

Tinktonks