Yahoo weather API giving errors for certain US lat/lng locations

Question

I am creating pages about parks. For each park, there is a lat/lng and for most parks, I am able to use the Yahoo weather API

But for some reason, some pages return errors like this:

Invalid Input /forecastrss?w=2347563

After a call that I make like this to the Yahoo weather API:

http://www.geomojo.org/cgi-bin/reversegeocoder.cgi?long=-121.433098&lat=40.509312

Any idea how I can resolve these sorts of errors?

Here is my code:

$url = 'http://www.geomojo.org/cgi-bin/reversegeocoder.cgi?long='.$lng.'&lat='.$lat;


// Calls the url to get the zip code and woeid
$webpage = file_get_contents($url);
//echo $webpage;
try
{
     $xml = new SimpleXMLElement($url, 0, true);

     // Gets the woeid to look up the weather in that specific place dynamically.
     $woeid= $xml->woeid; // Displays "Text"
     $zip =  $xml->name; // Displays "Text"

    // URL to send to yahoo weather to get weather RSS
        $yahoo_url = 'http://weather.yahooapis.com/forecastrss?w='.$woeid;

    $xml = file_get_contents($yahoo_url);
    $yahoo_response = new SimpleXMLElement($xml , 0, false);

    $weather_description = $yahoo_response->channel->item->description;

    $splitdata = explode('<a', $weather_description);
    echo '<p>'.$splitdata[0].'</p>';
}
catch  (Exception $e)
{
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}

Here is a url of an example where this doesn't work. See the weather section on the left side:

http://www.comehike.com/outdoors/parks/park.php?park_id=86

Answer 1

This geocoding call

http://www.geomojo.org/cgi-bin/reversegeocoder.cgi?long=-121.433098&lat=40.509312

is only returning a state, California.

If I had to make a wild guess, I'd say the weather API needs a more specific location than that. This may be because some parks are so remote (or the nearest town so small) that the geocoder can't find a city for the coordinates you're passing.