When a tornado touched down, the weather radar was offline
Meteorologists are trying to figure out why
The outage happened amid storms that produced heavy rainfall, hail and even a tornado in the St. Louis region.

ST. LOUIS — Meteorologists at 5 On Your Side were left in the dark Monday night during a critical moment.
As a storm system brought heavy rainfall, hail and even a tornado to the St. Louis region overnight, the National Weather Service's (NWS) radar went dark. Chief Meteorologist Scott Connell and Meteorologist Garry Frank were forced to track the storm's movement by lightning strikes alone late Monday into Tuesday morning.

https://www.ksdk.com/article/weather/severe-weather/nationwide-weather-radar-outage-st-louis-severe-storms/63-8a10be28-1972-46a7-a6c3-16da530bbe55