Here's a list of resources I use to make my maps. If you see anything in my maps that I don't have listed here, shoot me an email and ask where I got it from. If it's freely available, I'll be happy to send along a link or point you in the right direction.
Some of the files (like the WPC's percentile forecasts) are listed in .grb format, which requires the National Weather Service's tkdegrib program to convert into a usable file. The link is at the very bottom of this page.
SEVERE WEATHER
SPC OUTLOOKS
Current Watches/Warnings (IEM)
SPC Storm Report Archive (IEM)
U.S. Tornadoes (1950-2019, SPC)
Canada Tornadoes (1980-2009, ECCC)
SATELLITE IMAGERY
NOAA has an archive of GOES-16 and GOES-17 data hosted on Amazon AWS. This data is free to download and the files (NetCDF, .nc) can be ingested into GIS software as rasters.
The files are organized in folders using years, Julian dates (February 1 = 32, July 19 = 200, and so on), and times in UTC.
GOES-16:
GOES-17:
