Check the links to the forecast. I don't think the printable forecast link is being used.
Looks like this is in the settings for Tulsa:
http://forecast.weather.gov/MapClick.php?CityName=Tulsa&state=OK&site=MTR&textField1=36.0400&textField2=-95.980&e=0&TextType=2
This is the corrected URL when viewing the page source:
http://forecast.weather.gov/MapClick.php?lat=36.0400&lon=-95.980&unit=0&lg=english&FcstType=text&TextType=2
Checking the URL's:
//URL below --MUST BE-- the Printable Point Forecast from the NOAA website
//
//Not every area of the US has a printable point forecast
//
//This script will ONLY WORK with a printable point forecast!
//
//To find yours in your area:
//
//Go to www.weather.gov
//Put your city, state in the search box and press Search
//Scroll down to the "Additional Forecasts & Info" on the page displayed
//Click on Printable Forecast
// copy the URL from your browser into the $fileName variable below.