{"date":"1964-06-21","county":"Boulder","state":"Colorado","page":"https://www.myhailscore.com/storm/1964-06-21/boulder-county-co","license":"Free to cite with attribution to HailScore (myhailscore.com). Underlying weather data: NOAA (public domain).","disclaimer":"Hail exposure record, not a damage determination. MESH is tuned so that roughly 75% of measured hail comes in at or below the radar estimate; read a size as a class (within about one tier), not as a measurement.","status":"verified","source":"NOAA Storm Events Database (NCEI)","maxHailSizeInches":1.75,"eventCount":1,"firstEventUtc":"1964-06-22T00:55:00.000Z","lastEventUtc":"1964-06-22T00:55:00.000Z","events":[{"noaaEventId":"9989130","hailSizeInches":1.75,"timeUtc":"1964-06-22T00:55:00.000Z","lat":40.08,"lon":-105.08}],"dataCurrentAsOf":"2026-10-10T10:59:16.154Z"}