{"date":"1973-09-09","county":"Jefferson","state":"Colorado","page":"https://www.myhailscore.com/storm/1973-09-09/jefferson-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. Radar-estimated sizes carry roughly a ±0.25 inch margin versus ground measurements.","status":"verified","source":"NOAA Storm Events Database (NCEI)","maxHailSizeInches":1.75,"eventCount":1,"firstEventUtc":"1973-09-09T23:25:00.000Z","lastEventUtc":"1973-09-09T23:25:00.000Z","events":[{"noaaEventId":"9989326","hailSizeInches":1.75,"timeUtc":"1973-09-09T23:25:00.000Z","lat":39.92,"lon":-105.17}],"dataCurrentAsOf":"2026-07-11T23:29:10.053Z"}