IOS – keep apple appstore revenue with apple for longer time

Unfortunately no: if you didn't submit it yourself there's no access to the keywords. They don't show up in the official RSS feeds nor in the scrape-able web pages. Searches in iTunes on a computer or mobile device are performed entirely on Apple's servers, so the keywords aren't exposed on the clients.

I recommend the Weather Underground app. I use it a lot for weather information (for which it seems to have the most conclusive collection, and I also use it's excellent alerts.

One can choose any combination, from a complete list of warnings, which alerts to be notified of. You can also limit alerts to only notify you between certain times of the day.

I just confirmed, however, that it doesn't have an exclusive "Freeze Warning" alert that can be turned off and on. It has "Special Weather Statements", and "Winter Advisories", which would probably function that way. However, the "Winter Advisories" indicates that it is for accumulation type wintry precipitation.

It is a free app and very easy to configure those notifications. It has ads which can be disabled with a subscription, but those are irrelevant to push alerts.