This is the project info page for collecting reports of hail accumulations from thunderstorms (e.g., deep hail on 5 June 2015). The project will collect reports of extreme hail events. This page will show you what data we need and how to get the data to us.
Data collected (click links for further instructions): Location of hail, Time/Duration of hail, Hail depth, Hail size, Pictures & videos
Submit the data via (see the following links for further instructions): Google Forms or NOAA Storm Report or Email or Facebook or Twitter (google form, facebook, and twitter will require a pre-existing account)
Further instructions on how to draft the report:
Google Maps Instructions: 1) Open Google Maps to the location, 2) Right click on the location you observed hail and click “What’s here?”, 3) Log Latitude and Logitude for the report
Time / Duration
the most useful. Example: Hail started falling at 3:35 pm and ended at 3:55 pm Mountain Standard Time
Example: The average of 10 measurements provided a depth of 3 inches.
other length measuring device is not available, give your best estimate. You can
use common relations to estimate size, coin sizes (dimes, nickel, quarter, half
dollar) or sports equipment (golf ball, baseball). Look for not only the
maximum hail size, but the smallest hail size and what appears to be the
average hail size. Be clear about reporting hail radius or diameter.
Helpful links: Hail size comparison chart; Hail size description chart; Hail reporting
Example: The largest hail stone found was 1 inch in diameter, the smallest, 0.25 inches in diameter, and what appeared to be the average size was 0.5 inches in diameter.
Sample Tweets:(151 characters with spaces)
@NWSBoulder #deephail 5 miles south of CR5 & CR 10 from 3:35 to 3:55 pm. Average depth: 3 inches. Max size: 1 inch, min size: 0.25 inch, avg size: 0.5 inch.
(136 characters with spaces) @NWSBoulder #deephail at Lat: 40.001, Long: 105.254. Average depth: 3 inches. Max size: 1 inch, min size: 0.25 inch, avg size: 0.5 inch.
Example: 5 miles south of CR 5 & CR 10 from 3:35 to 3:55 pm on 5/21. Average depth: 3 inches. Max size: 1 inch, min size: 0.25 inch, avg size: 0.5 inch.
NOAA Storm Report