Citizen Science Forecasting Observations

CHAT: The Colorado Hail Accumulation from Thunderstorms Project

  • By Katja Friedrich, Robinson Wallace, Bernard Meier, Nezette Rydell, Wiebke Deierling, Evan Kalina, Brian Motta, Paul Schlatter, Thomas Schlatter, and Nolan Doesken
  • Jul 31, 2023

Deep hail accumulations, sometimes up to 50 cm in depth, have occurred frequently enough to catch the attention of the National Weather Service (NWS), the general public, and social/digital media outlets.

Despite the extreme nature of these storms, adequate reports or measurements of accumulated hail depth are currently not collected or archived, and products to track or forecast these events do not exist, preventing guidance from being issued to emergency responders, transportation departments, and the general public.

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