This is a rather painful piece of code that gets wind data from NOAA's servers. Node.js/Async.js. You're welcome.

grads.js

/**
 *
 * fnstraj | GrADS Functions
 * Copyright 2011-2012 Hotchkissmade
 * Released under the GPL
 *
 * grads.wind - return wind speed and direction.
 *
 */

exports.wind = function( longitude, latitude, altitude, time, model, parentCallback ) {
    var lev, u_ext, v_ext;
    var baseURL = "http://nomads.ncep.noaa.gov:9090/dods/";



    ///////////////////////////
    // Date-Time Corrections //
    ///////////////////////////
    // awk fixme
    time = new Date(); // override given date
    time = time.setHours( time.getHours() - 2 ); // lies
    
    now    = new Date( time );
    year   = now.getUTCFullYear();
    month  = ( now.getUTCMonth() < 10 ) ? "0" + ( now.getUTCMonth() + 1 ) : ( now.getUTCMonth() + 1);
    date   = ( now.getUTCDate() < 10 ) ? "0" + now.getUTCDate() : now.getUTCDate();    
    hour   = ( now.getUTCHours() < 10 ) ? "0" + now.getUTCHours() : now.getUTCHours();
    minute = Math.round(( now.getUTCMinutes() / 60) * 18 );
    // endawk fixme


 
    ///////////////////////////////////
    // Coordinate Mapping (to Model) //
    ///////////////////////////////////
    if ( model === "rap" ) {
        //
        // Investigate an *actual* formula for this, champ. Not linear.
        // 
        latitude  = Math.floor(( ( latitude - 16.281 ) / ( 58.02525454545 ) ) * 226 ); // WRONG.
        longitude = Math.floor(( ( -139.85660300000 - ( longitude + 57.69083517955 )) / -139.85660300000 ) * 427 ); // WRONG.

        modelURL = "rap/rap" + year + month + date + "/rap_f" + hour + ".ascii?";
    } else if ( model === "gfs" ) {

    } else if ( model === "gfshd" ) {

    }



    //////////////////////////////////
    // Altitude Level Determination //
    //////////////////////////////////
    if ( altitude < 12000 ) {
        level = Math.round(( altitude / 12000 ) * 36);

        u_ext = "ugrdprs[" + minute + "][" + level + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrdprs[" + minute + "][" + level + "][" + latitude + "][" + longitude + "]";
    } else if ( altitude >= 12000 && altitude < 14000 ) {
        u_ext = "ugrd180_150mb[" + minute + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrd180_150mb[" + minute + "][" + latitude + "][" + longitude + "]";
    } else if ( altitude >= 14000 && altitude < 15000 ) {
        u_ext = "ugrd150_120mb[" + minute + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrd150_120mb[" + minute + "][" + latitude + "][" + longitude + "]";
    } else if ( altitude >= 15000 && altitude < 17000 ) {
        u_ext = "ugrd120_90mb[" + minute + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrd120_90mb[" + minute + "][" + latitude + "][" + longitude + "]";
    } else if ( altitude >= 17000 && altitude < 19000 ) {
        u_ext = "ugrd90_60mb[" + minute + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrd90_60mb[" + minute + "][" + latitude + "][" + longitude + "]";
    } else if ( altitude >= 19000 && altitude < 24000 ) {
        u_ext = "ugrd60_30mb[" + minute + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrd60_30mb[" + minute + "][" + latitude + "][" + longitude + "]";
    } else if ( altitude >= 24000 ) {
        u_ext = "ugrd30_0mb[" + minute + "][" + latitude + "][" + longitude + "]";
        v_ext = "vgrd30_0mb[" + minute + "][" + latitude + "][" + longitude + "]";
    }



    ///////////////////////////////////
    // Get Wind Files (Concurrently) //
    ///////////////////////////////////
    async.parallel({
        u_wind: function( callback ) {            
            u_url = url.parse(baseURL + modelURL + u_ext);
            u_res = ""; 
            
            u_req = http.get({
                hostname: u_url.hostname, 
                path: u_url.path
            }, function( response ) {
                response.setEncoding('utf8');
                
                response.on("data", function( data ) {
                    u_res += data
                });
                
                response.on("end", function() {
                   callback(null, u_res);
                });
            }).on("error", function() {
                callback(true, null); 
            });
        },

        v_wind: function( callback ) {            
            v_url = url.parse(baseURL + modelURL + v_ext);
            v_res = "";
            
            v_req = http.get({
                hostname: v_url.hostname, 
                path: v_url.path
            }, function( response ) {
                response.setEncoding('utf8');
                
                response.on("data", function( data ) {
                    v_res += data
                });
                
                response.on("end", function() {
                   callback(null, v_res);
                });
            }).on("error", function() {
               callback(true, null); 
            });
        }
    }, function( error, results ) {
        if ( error ) {
            console.log(data);
                
            //parentCallback( error, null );
        } else {
            /////////////////////////////////////////////////////
            // Transform U & V Components to Wind Vector (m/s) //
            /////////////////////////////////////////////////////
            u_wind = results.u_wind.substring( u_res.indexOf("[0],") + 5, u_res.indexOf("\n", 30));
            v_wind = results.v_wind.substring( results.v_wind.indexOf("[0],") + 5, results.v_wind.indexOf("\n", 30));
            u_wind = u_wind.trim();
            v_wind = v_wind.trim();
            
            cache[u_ext] = u_wind;
            cache[v_ext] = v_wind;
            
            heading = Math.atan2( v_wind, u_wind ) * degrees;
            speed = Math.sqrt( Math.pow(Math.abs(v_wind), 2) + Math.pow(Math.abs(u_wind), 2) );
            
            parentCallback(null, { speed: speed, heading: heading }, parentCallback);
        }
    });
}