Indianapolis National Weather Service Forecast Office – Spotter Information Page – http://www.weather.gov/ind/spotter
NWS Weather Spotter’s Field Guide – https://www.weather.gov/media/bis/Weather_Spotter_Field_Guide.pdf
2021 NWS IND Spotter Talk presentation - https://www.weather.gov/media/ind/spottertraining/SpotterTalk2021withNot...
UCAR/COMET Online Spotter Training Course – https://www.meted.ucar.edu/training_course.php?id=23
NWS Jetstream Online Weather School – https://www.weather.gov/jetstream/