Unfortunately, Wunderground.com does not offer unrestricted access to the data of a PWS. API Keys are basically limited in use as follows:

• A maximum of 1500 calls per day
• A maximum of 30 calls per minute

If the limit is exceeded, the Wunderground.com server returns obsolete or no data to myPWS. The limit can not be bypassed or deactivated.

The current consumption can be viewed in the Wunderground.com account under API Keys >>> Show Usage.