"Margin note over body text"

\documentclass[twoside]{article}
\usepackage{lipsum}
\usepackage{wrapfig}
\setlength{\wrapoverhang}{\marginparwidth}
\addtolength{\wrapoverhang}{\marginparsep}
\usepackage[left=1in,right=2.5in,top=1in,bottom=1in]{geometry}
\begin{document}
\lipsum[1]
\begin{wrapfigure}[11]{O}{6.3cm}
\vspace{-10pt} %% If needed
This is a margin note getting wrapped with the text and going into margin as well.
In \verb!\begin{wrapfigure}[8]{O}[2cm]{6cm}!, \texttt{[8]} denotes the number of line space in the margin note, \texttt{{O}} is the alignment, \texttt{[2cm]} is amount by which the note goes in to the margin (called over hang) and \texttt{{6cm}} is the width.
\vspace{10pt} %% If needed
\end{wrapfigure}
\lipsum[2-3]
\clearpage
\lipsum[3]
\begin{wrapfigure}[11]{O}{6.3cm}
% \vspace{-10pt} %% If needed
This is a margin note getting wrapped with the text and going into margin as well.
In \verb!\begin{wrapfigure}[8]{O}[2cm]{6cm}!, \texttt{[8]} denotes the number of line space in the margin note, \texttt{{O}} is the alignment, \texttt{[2cm]} is amount by which the note goes in to the margin (called over hang) and \texttt{{6cm}} is the width.
% \vspace{10pt} %% If needed
\end{wrapfigure}
\lipsum[4-5]

\end{document}