The CWSU National Map that was hosted on wrh.noaa.gov was removed. The Mesowest database was becoming outdated and less reliable, and without 24/7 technical support. You can always get current conditions on AWC's METAR page. Hover capability is under the Configure drop down above the map. Another option is the Weather Hazards and Data Viewer hosted by the NWS Western Region.
Try installing the latest version of Java and add "www.aviationweather.gov" to the exception list in the Java security tab (control panel → Java). The Flight Path Tool (FPT) was developed several years ago when the use of Java was more widely accepted. Most of the problems today are with the upgrades of Java to version 7 and 8 as well as changes to the security within Java. This can affect Windows 10, Mac, and some Linux operating platforms. As such, we've migrated almost all of our web away from Java with the exception of FPT. We are exploring options for a different service, but they have not yet been completed. In the meantime, you might be able to get FPT to work by setting an exception for apps coming from www.aviationweather.gov.
You can use the feedback page to submit a bug, a suggestion for improvements or a general comment. There are some new features and there will be some initial bugs. Please don't hesitate to let us know. We run a deployment of functionality upgrades every month. Critical bugs will be fixed as soon as possible. To submit feedback, go to: /contact.
Request additional TAF sites through the NextGen Aviation Weather Request Form.
For those with older browsers or slow network connections, it's recommended to toggle off the GIS interactive maps. This is done through the User Settings page.
A brief tutorial is available at /help/tutorial. Please check it out.
It depends on the data type:
NOTAMs are managed by the FAA, and can be viewed via the PilotWeb Site: PilotWeb.
This is a great recourse: Jetstream - An Online School of Weather.