Wxsim different values of rainfall on lastret and plaintext

Software WxSim
1

Hi to all,
sometimes i’ve plaintext and lastret with different value of rainfall.
No rain on lastret, few rain on plaintext.

Do you remember why come out these differences?
Is it normal?

Thanks in advance,

Alessandro

2

Is this rain on plaintext given as an amount, or just a probablility?

Tom

3

Hi Tom,
less than 2mm