SKYWARN and REACT spotters warn communities of approaching tornados and other severe weather.
Spotters play a vital role in the NWS reporting system because radar cannot detect tornados. Doppler radar detects air circulations that may spawn tornados. Tornados often form before a Doppler radar signature is detected.
TORNADOLERT improves a spotter's tornado detection capability. It detects tornados within a 10 mile range 24 hours a day, in good and bad weather. No missed detections, no false alarms, and 100% reliable.