Although the main site is now back up again:
https://www.aviationweather.gov/adds/metars/
The METAR API service is still not returning any current data. For example:
Returns the correct XML response but with an empty list of METARs.
Increasing the time window to the last 24 hours:
Returns the correct XML response but with a METAR that is 20 hours old.
The METAR API service has been available and responding to requests throughout the period of outage, but does not have current data available. This problem started somewhere between 1450Z and 1520Z yesterday as seen from the time of the EGLL METAR that they are still returning from the URL above:
EGLL 201450Z AUTO 35005KT 310V040 9999 SCT036 09/03 Q1021 NOSIG
Garmin Pilot is one service that is still serving current METARs so must use a source that is independent of NOAA/ADDS.
Use Chrome or Firefox to view the XML data at the URLs above, Safari may not display it correctly.
Aviation tools (android.)is not updated either.
Many thanks for posting that detail, dnj.
It will be interesting if they end up changing the website, because most of the free aviation wx sites just parse the HTML, and break if there is a font spec etc added.
Autorouter’s wx info works, but it only gives old data. The most recent info appear to be from yesterday at 1450Z.
I use this feed
http://www.aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz
and it has not stopped working.
That’s a great find 
Only about 300k and you get the lot, and easy to parse too.
I also found the fairly obvious re-name:
http://www.aviationweather.gov/adds/dataserver_current/current/tafs.cache.xml.gz
but that has tafs only for big airports.
Aeroplus Aviation Weather is serving current data again
That’s probably because ADDS has just been fixed. This is fresh from my private site which uses ADDS
Peter wrote:
That’s probably because ADDS has just been fixed
Thank goodness for that, getting TAF METAR has been a nightmare.
The only site (that I use) that was not affected was …. skyvector.com
quatrelle wrote:
The only site (that I use) that was not affected was …. skyvector.com
The various services run by national CAAs (like aro.lfv.se) should not have been affected either.
