<div dir="ltr">Hi all,<div><br></div><div>I have a question about nudging.</div><div>I cannot use observation nudging for precipitation right? because its only applicable for state variables..</div><div><br></div><div>Question is,Can analysis nudging (grid nudging) be used to nudge precipitation?</div>

<div>I have this paper :</div><div><a href="http://www.hindawi.com/isrn/meteorology/2012/523942/">http://www.hindawi.com/isrn/meteorology/2012/523942/</a><br></div><div><br></div><div><h2 style="border:0px none;font-family:MinionPro-bold;font-weight:normal;margin:0px 0px 5px;outline:none 0px;padding:0px;font-size:22px;line-height:24px;color:rgb(0,0,0)">

A Comparative Study on Performance of Analysis Nudging and 3DVAR in Simulation of a Heavy Rainfall Event Using WRF Modeling System</h2><div class="" style="border:0px none;font-family:MinionPro-Regular,sans-serif;margin:12px 0px;outline:none 0px;padding:0px;color:rgb(0,0,0);font-size:17px;line-height:19px">

<a href="http://www.hindawi.com/32491524/" style="border:0px none;font-family:inherit;font-style:inherit;margin:0px;outline:none;padding:0px;text-decoration:none;color:rgb(65,139,52)">Ashish Routray</a>,<sup style="line-height:normal">1,2</sup> <a href="http://www.hindawi.com/73614257/" style="border:0px none;font-family:inherit;font-style:inherit;margin:0px;outline:none;padding:0px;text-decoration:none;color:rgb(65,139,52)">Krishna K. Osuri</a>,<sup style="line-height:normal">3</sup> and <a href="http://www.hindawi.com/21250301/" style="border:0px none;font-family:inherit;font-style:inherit;margin:0px;outline:none;padding:0px;text-decoration:none;color:rgb(65,139,52)">Makarand A. Kulkarni</a><sup style="line-height:normal">4</sup></div>

</div><div class="" style="border:0px none;font-family:MinionPro-Regular,sans-serif;margin:12px 0px;outline:none 0px;padding:0px;color:rgb(0,0,0);font-size:17px;line-height:19px"><sup style="line-height:normal"><br></sup></div>

<div class="" style="border:0px none;font-family:MinionPro-Regular,sans-serif;margin:12px 0px;outline:none 0px;padding:0px;color:rgb(0,0,0)"><span style="font-size:14px">Does this mean i have to include my rainfall data in the little_r format and still run it in OBSGRID?</span></div>

<div class="" style="border:0px none;font-family:MinionPro-Regular,sans-serif;margin:12px 0px;outline:none 0px;padding:0px;color:rgb(0,0,0)"><span style="font-size:14px"><br></span></div><div class="" style="border:0px none;font-family:MinionPro-Regular,sans-serif;margin:12px 0px;outline:none 0px;padding:0px;color:rgb(0,0,0)">

<span style="font-size:14px">Thanks for any help</span></div></div>