<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none"><!--P{margin-top:0;margin-bottom:0;} .ms-cui-menu {background-color:#ffffff;border:1px rgb(171, 171, 171) solid;font-family:'Segoe UI WPC','Segoe UI',Tahoma,'Microsoft Sans Serif',Verdana,sans-serif;font-size:10pt;color:rgb(51, 51, 51);} .ms-cui-menusection-title {display:none;} .ms-cui-ctl {vertical-align:text-top;text-decoration:none;color:rgb(51, 51, 51);} .ms-cui-ctl-on {background-color:rgb(223, 237, 250);opacity: 0.8;} .ms-cui-img-cont-float {display:inline-block;margin-top:2px} .ms-cui-smenu-inner {padding-top:0px;} .ms-owa-paste-option-icon {margin: 0px 6px 0px 6px;vertical-align:middle!important;padding-bottom: 2px;display:inline-block;} .ms-rtePasteFlyout-option:hover {background-color:rgb(223, 237, 250) !important;opacity:1 !important;} .ms-rtePasteFlyout-option {padding:8px 4px 8px 4px;outline:none;} .ms-cui-menusection {float:left; width:85px;height:24px;overflow:hidden}.wf {speak:none; font-weight:normal; font-variant:normal; text-transform:none; -webkit-font-smoothing:antialiased; vertical-align:middle; display:inline-block;}.wf-family-owa {font-family:'o365Icons'}@font-face {  font-family:'o365IconsIE8';  src:url('https://r4.res.outlook.com/owa/prem/16.0.288.10/resources/styles/office365icons.ie8.eot?#iefix') format('embedded-opentype'),         url('https://r4.res.outlook.com/owa/prem/16.0.288.10/resources/styles/office365icons.ie8.woff') format('woff'),         url('https://r4.res.outlook.com/owa/prem/16.0.288.10/resources/styles/office365icons.ie8.ttf') format('truetype');  font-weight:normal;  font-style:normal;}@font-face {  font-family:'o365IconsMouse';  src:url('https://r4.res.outlook.com/owa/prem/16.0.288.10/resources/styles/office365icons.mouse.eot?#iefix') format('embedded-opentype'),         url('https://r4.res.outlook.com/owa/prem/16.0.288.10/resources/styles/office365icons.mouse.woff') format('woff'),         url('https://r4.res.outlook.com/owa/prem/16.0.288.10/resources/styles/office365icons.mouse.ttf') format('truetype');  font-weight:normal;  font-style:normal;}.wf-family-owa {font-family:'o365IconsMouse'}.ie8 .wf-family-owa {font-family:'o365IconsIE8'}.ie8 .wf-owa-play-large:before {content:'\e254';}.notIE8 .wf-owa-play-large:before {content:'\e054';}.ie8 .wf-owa-play-large {color:#FFFFFF/*$WFWhiteColor*/;}.notIE8 .wf-owa-play-large {border-color:#FFFFFF/*$WFWhiteColor*/; width:1.4em; height:1.4em; border-width:.1em; border-style:solid; border-radius:.8em; text-align:center; box-sizing:border-box; -moz-box-sizing:border-box; padding:0.1em; color:#FFFFFF/*$WFWhiteColor*/;}.ie8 .wf-size-play-large {width:40px; height:40px; font-size:30px}.notIE8 .wf-size-play-large {width:40px; height:40px; font-size:30px}.notIE8 .wf-owa-triangle-down-small:before {content:'\e052';}.ie8 .wf-owa-triangle-down-small:before { content:'\e052';}.ie8 .wf-owa-triangle-down-small {color:#666666/*$WFGreyColor*/;}.wf-size-x20 {font-size: 20px!important;}--></style>
</head>
<body dir="ltr">
<div id="OWAFontStyleDivID" style="font-size:10pt;color:#000000;background-color:#FFFFFF;font-family:Tahoma, Geneva, sans-serif;">
<p>Hi,<br>
</p>
<p><br>
</p>
<p>I am trying to get values from a specific location from my global WRF-ARW that is using the lat-lon projection.</p>
<p><br>
</p>
<p>When I use the wrf_user_ll_to_ij function, the generated grid points are invalid for the variable I am trying to use.</p>
<p><br>
</p>
<p>For example, I attempted a conversion and got these invalid points:</p>
<p><br>
</p>
<p>(0)&nbsp;&nbsp; &nbsp;Requested xlat = 36<br>
(0)&nbsp;&nbsp; &nbsp;Requested xlon = -79<br>
(0)&nbsp;&nbsp; &nbsp;Calculated xlat = -56<br>
(0)&nbsp;&nbsp; &nbsp;Calculated xlon = 89<br>
<br>
</p>
<p><br>
</p>
<p>Has anyone had better luck with this WRF projection?</p>
<p><br>
</p>
<p>Thanks,<br>
</p>
<div>
<p><br>
</p>
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px"><font style="font-family:Courier New" size="2"><font face="Tahoma"><font style="font-family:Courier New" size="2"><font face="Tahoma"><b><font size="2"><font size="2"><span style="font-size:10pt">Warren Pettee<br>
Undergraduate - Meteorology<br>
</span></font></font></b><font size="1"><span style="font-size:10pt">Department of Geography and Earth Sciences<br>
University of North Carolina at Charlotte<br>
9201 University City Blvd, Charlotte, NC 28223<br>
wpettee@uncc.edu</span></font><b><font size="2"><font size="1"><br>
</font></font></b></font></font></font></font><font color="000000" size="1"><font size="1"><font size="1"></font></font></font></div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>