With severe storm season right around the corner, here are some helpful FAQs to review from NWS SPC when you have time...


This one in particular is good, which helps explain why there can be a thunderstorm, but no NWS weather alerts get issued.

How does the NWS define a severe thunderstorm? 

A severe thunderstorm refers to a thunderstorm producing hail that is at least 1 inch in diameter or larger, and/or wind gusts of 58 mph or greater, and/or a tornado. Although lightning can be deadly, the NWS doesn't use it to define a severe thunderstorm. If it did, every thunderstorm would be severe, by definition. Also, excessive rainfall may lead to deadly flash flooding, but heavy rain is not a severe criterion either. The flood threat is handled through a separate set of watches and warnings from your local NWS office.

The part I highlighted in red is what WDT Support would educate users with once they confirmed that no NWS alerts were issued for a customer’s location, for when the customer complained they didn’t get any alert despite stormy winds, thunder, heavy rain at their location.

For us, WSI will still have to confirm for us the alerting part first, but once we know that, you can use this info in your customer replies if you’re not already, while WSI doesn’t have the capability to show a screenshot of user’s location on a map with/without any NWS polygon.