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Here is the current forecast discussion on space weather and geophysical activity, issued 2015 Nov 28 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was at very low levels. Region 2459 (N04E25, Hrx/alpha) produced the only flare of the period, a B4 at 27/1342 UTC. Slight growth was observed in the intermediate and trailing spots of Region 2458 (N08W00, Cao/beta). The rest of the spotted regions were stable. No Earth-directed coronal mass ejections were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be at very low levels with a chance for C-class flares over the next three days (28-30 Nov).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux was at normal levels while the greater than 10 MeV proton flux remained at background levels throughout the period.

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels over the next three days (28-30 Nov). The greater than 10 MeV proton flux is expected to persist at background levels for the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters were at mostly ambient conditions with slightly enhanced magnetic field strength. Solar wind speeds averaged around 320 km/s with total field strength between 5 nT and 14 nT. The Bz component was mostly positive ranging from 14 nT to -11 nT. Phi angle was oriented in a negative (towards) sector.

Forecast: A recurrent positive polarity coronal hole high speed stream (CH HSS) is likely to become geoeffective late on day three (30 Nov). Last rotation, solar wind speeds reached the mid 700 km/s range, however there was likely an embedded transient that could have caused some enhancement. STEREO A Plastic data had similar speeds occurring around midday on 18 November as the CH HSS passed the spacecraft. Although there has been some weakening with the coronal hole, apparent in SDO/AIA 193 imagery, solar wind speeds reaching 600 km/s are possible.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be at quiet to unsettled levels through late on day three (28-30 Nov). By late on day three, a positive polarity CH HSS is expected to become geoeffective causing unsettled to active periods.

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