Sorry you’re having issues with the update to V3 
I’d suggest changing the forecast URL of
$SITE['NWSforecasts'] = array( // for the advforecast2.php V3.xx version script
// use "Zone|Location|Point-printableURL", as entries .. first one will be the default forecast.
"INZ087|Newburgh|http://forecast.weather.gov/MapClick.php?lat=37.943935120058626&lon=-87.3962801904297",
to
$SITE['NWSforecasts'] = array( // for the advforecast2.php V3.xx version script
// use "Zone|Location|Point-printableURL", as entries .. first one will be the default forecast.
"INZ087|Newburgh|http://forecast.weather.gov/MapClick.php?lat=37.94449&lon=-87.40528649999999&unit=0&lg=english&FcstType=text&TextType=2",
as that is the point-printable forecast link you need to use. You can also remove the rest of the entries
"CAZ513|Los Gatos|http://forecast.weather.gov/MapClick.php?CityName=Los+Gatos&state=CA&site=MTR&textField1=37.2267&textField2=-121.974&e=0&TextType=2",
"CAZ513|Cupertino|http://forecast.weather.gov/MapClick.php?CityName=Cupertino&state=CA&site=MTR&textField1=37.3231&textField2=-122.031&e=0&TextType=2",
"CAZ513|Sunnyvale|http://forecast.weather.gov/MapClick.php?CityName=Sunnyvale&state=CA&site=MTR&textField1=37.3689&textField2=-122.035&e=0&TextType=2",
"CAZ513|Santa Clara|http://forecast.weather.gov/MapClick.php?CityName=Santa+Clara&state=CA&site=MTR&textField1=37.3542&textField2=-121.954&e=0&TextType=2",
"CAZ513|San Jose|http://forecast.weather.gov/MapClick.php?CityName=San+Jose&state=CA&site=MTR&textField1=37.3394&textField2=-121.894&e=0&TextType=2",
"CAZ508|Mountain View|http://forecast.weather.gov/MapClick.php?CityName=Mountain+View&state=CA&site=MTR&textField1=37.3861&textField2=-122.083&TextType=2",
"CAZ529|Santa Cruz|http://forecast.weather.gov/MapClick.php?CityName=Santa+Cruz&state=CA&site=MTR&textField1=36.9742&textField2=-122.03&e=0&TextType=2",
"CAZ006|San Francisco|http://forecast.weather.gov/MapClick.php?CityName=San+Francisco&state=CA&site=MTR&textField1=37.775&textField2=-122.418&e=0&TextType=2",
since I doubt your visitors will be interested in my Northern California forecasts 
The logo centering can be done by changing header.php from
<a href="index.php" title="Browse to homepage"><img src="tristate1.jpg" alt="Tristate-Weather.com" border="none" /></a>
to
<a href="index.php" title="Browse to homepage"><img src="tristate1.jpg" alt="Tristate-Weather.com" style="border-style: none; margin-left: 50px;" /></a>
The 50px is one half the difference between the width of the page in narrow aspect (800px) and the width of your image (700px) … it won’t be centered if you allow use of the wide aspect with this method.
For your MWWN.php page, I see an error
Fatal error: Call to undefined function curl_fetch_file() in /virtual/users/e15346-16062/web/MWWN.php on line 58
… The MWWN doesn’t use cUrl at all, so it must be the code on the MWWN page itself. I suggest you change it to something like
<?php
$doPrintMWWN = false;
include("MWWN-mesomap.php");
print $MWWN_CSS; ?>
somewhere before the part of the page, and
<table width="99%">
<tr><td align="center">
<table width="620">
<tr><td style="text-align:left">
<?php print $MWWN_MAP; ?>
</td></tr>
<tr><td>
<?php print $MWWN_TABLE; ?>
</td></tr>
</table>
</td></tr>
</table>
as the content between the
…
tags.
Hope this helps…
Best regards,
Ken