Here is the current forecast discussion on space weather and...

Here is the current forecast discussion on space weather and geophysical activity, issued 2017 May 27 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low. Region 2659 (N13W57, Dai/beta) exhibited consolidation and growth of its leader spot while a decrease in area was observed in the trailer spot. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to continue at very low levels with a chance for C-class flare activity over the next three days (27-29 May).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels with a peak flux of 13,700 pfu observed at 26/1610 UTC. The greater than 10 MeV proton flux was steady at background levels.

Forecast: The greater than 2 MeV electron flux is expected to decrease to moderate levels on days one and two (27-28 May) due to enhanced geomagnetic field activity associated with the anticipated arrival of the 23 May CME. Moderate to high electron fluxes are expected to return by day three (29 May) as CME influence subsides.

The greater than 10 MeV proton flux is expected to persist at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters, as measured by the DSCOVR spacecraft, indicated nominal conditions. Total magnetic field strength remained below 5nT. Solar wind speeds were steady between 290-325 km/s. Phi angle was predominantly in the negative sector with the exception of a brief transitions to the positive sector between approximately 26/1800-2200 UTC.

Forecast: Solar wind parameters are expected to be enhanced late on days one and two (27-28 May) due to the anticipated arrival of the slow-moving 23 May CME. Near-background solar wind values are expected to return by day three(29 May) as CME influence subsides.

Geospace

24 hr Summary: The geomagnetic field was quiet under a background solar wind environment.

Forecast: The geomagnetic field is likely to reach active levels late on day one (27 May) and unsettled levels on day two (28 May) due to the anticipated arrival of the 23 May CME. Generally quiet conditions are expected on day three (29 May) with the return to a nominal solar wind regime.

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