Once you have obtained a personal weather station account, enter the PWS ID and Key/ Password on the WUHU main screen.
The password for your weather station is no longer the same as the password for your wunderground.com account. It is now a separate key that is generated specifically for each Weather Underground station ID. You can find the station key/password associated with each weather station in your list of weather stations here:
The Observation button was added to the main screen that will allow you to upload weather observations to Weather Underground only. The observations are optional and will have no effect on uploading weather data to Weather Underground or CWOP.
To enter a report, simply click the Observation button. There are two sections, one for reporting clouds and the other is for reporting weather phenomena. Select the conditions for each area then click the ‘Create Report’ button. If the ‘Report’ edit box is not blank, that information will be uploaded to Weather Underground.
You may report both cloud layer observations and weather observations simultaneously. You need not report weather phenomena if there is no such condition.
The reports will be uploaded for a period of one hour. After one hour, the report is no longer uploaded. This auto-expiration of the report is done to keep the information timely. Otherwise, if you reported a thunderstorm and did not update the observation, it would remain indefinitely.
Please refrain from uploading any remarks that do not comply with the Metar data specification (use correct terminology).
In the file section of the yahoo group, you can find the Metar data specification.