NOAA SPC Storm Reports

NOAA SPC Storm Reports

NOAA's Storm Prediction Center (SPC) publishes daily preliminary tornado, hail and damaging-wind reports for the continental US as CSV files and web listings, alongside its convective and fire-weather outlooks. Distinct from nws-api (api.weather.gov forecasts and alerts).

Coverage

Continental US preliminary severe weather reports. SPC's about page says: "For each 24 hour period beginning at 1200 UTC on the valid day, a graphic and listing of all continental U.S. preliminary severe weather reports that SPC received is available." and "Reports are binned into three categories: tornado, hail, and damaging winds." The reports page notes: "All Reports Are Considered Preliminary". History start: Not stated.

Verdict

Daily CSV files and web listings of preliminary US tornado, hail and wind reports from NOAA's Storm Prediction Center. SPC's about page says: "The Storm Prediction Center (SPC) is part of the National Weather Service (NWS) and the National Centers for Environmental Prediction (NCEP)." Licensed Custom (NWS public-domain terms): the NWS disclaimer says: "The information on National Weather Service (NWS) Web pages are in the public domain, unless specifically noted otherwise, and may be used without charge for any lawful purpose so long as you do not: 1) claim it is your own (e.g., by claiming copyright for NWS information -- see below), 2) use it in a manner that implies an endorsement or affiliation with NOAA/NWS, or 3) modify its content and then present it as official government material." Caveat from SPC: "Since the logging process is automated, missing or improperly formatted reports from local NWS offices will not get into the database." Rate limits: Not stated (static files). Signal Lab links only.