For tenths of an hr and displays in hrs and minutes when last updated.
<td><a href="forecast.txt">Forecast Model</a></td>
<?php list($stat,$age,$data) = explode("\t",check_file('forecast.txt',60*1440+30)); ?>
<td align="center"><?php echo $stat; ?></td> <td align="right"><?php echo round($age / 60 / 60, 2); ?></td>
<td><?php echo $data; ?></td>