The Over Cardiff and related Twitter feeds should now only issue warnings when the weather is fine. This has been achieved using Yahoo! Weather’s RSS API, which returns the weather for each location when the script checks for visible ISS passes.
In case you don’t know, Over Cardiff is one of a collection of Twitter feeds designed to alert users local to an area of upcoming visible passes by the ISS and Hubble. More info found on a previous blog post.
If the weather is deemed either clear, fair or partly cloudy then the Twitter feeds will still report an upcoming transit from that location. They will no longer send alerts when the weather is said to be mostly cloudy, overcast or other inclement conditions such as fog, snow and rain.