Predicted ionosphere disturbance scale: I1 - Disturbed
Predicted start time (UTC): 2016-05-18T11:30:00 (+/-12 hours)
Predicted Ionosphere Forecast TEC maps up to 24 hours in advance. The onset of disturbances in the ionosphere can be forecasted about 30 minutes in advance.
Current Ionosphere Current and one hour forecasted TEC maps, provided by SWACI.
Predicted geomagnetic disturbances: expected minimum Kp: 4
Predicted geomagnetic disturbances: expected maximum Kp: 7
Expected Hazards Impacts on high frequency (HF) radio propagation expected. Influence on positioning and navigation is possible.
Influenced geographic area: not specified
Probability of incidence:30%

Source: SWACI Service at German Aerospace Center - DLR

Corresponding solar warning message issued by SIDC Belgium 2016-05-17T10:16:36 (UTC):

Event type: CME_arrival
Latest Presto Message: LATEST PRESTO FROM SIDC - RWC BELGIUM