Saw this come across too....
Space Weather Message Code: WARPC0
Serial Number: 83
Issue Time: 2017 Sep 10 2342 UTC
EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 82
Valid From: 2017 Sep 10 1630 UTC
Now Valid Until: 2017 Sep 11 2359 UTC
Warning Condition: Persistence
NOAA Space Weather Scale descriptions can be found at
NOAA Space Weather Scales | NOAA / NWS Space Weather Prediction Center
Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights.
Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation
Storm conditions when assessing overall impact.