I get the same problem. Sometimes the meteo is tehre, sometine not. I saw the same error. Our config are really look alike.
weather:location.home.name= home
weather:location.home.latitude=xx.xxxxx
weather:location.home.longitude=-yy.yyyyy
#weather:location.<locationId1>.woeid=
weather:location.home.provider=Wunderground
weather:location.home.language=fr
weather:location.home.updateInterval=15
If you go to your account on the wunderground website you can have some info on how many call you do per day. I got 2 day without the same amount. Can be an additional tool to troubleshoot.