[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2019 May 31 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2019 May 31 1230 UTC.

Solar Activity

24 hr Summary: Solar activity remained very low under a spotless disk. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to remain at very low levels on 31 May-02 Jun. Old Region 2741 (N05, L=272) is due to return on late 31 May into early 01 Jun.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels with a peak flux of 1,766 pfu observed at 30/1800 UTC. The greater than 10 MeV proton flux remained at background levels.

Forecast: The greater than 2 MeV electron flux is expected to be at moderate to high levels all three days (31 May - 02 Jun). The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters reflected waning influence of a negative polarity CH HSS. Total field ranged between 1-6 nT while the Bz component varied between +4 nT to -5 nT. Solar winds gradually decreased from near 525 km/s to approximately 430 km/s. The phi angle was oriented predominately in the negative solar sector.

Forecast: Negative polarity CH HSS influence is expected to continue to wane over the next two days (31 May - 01 Jun). A return to background conditions is expected by day three (02 Jun).

Geospace

24 hr Summary: The geomagnetic field was at quiet levels.

Forecast: Field conditions are expected to be at quiet to unsettled levels under waning negative polarity CH HSS influence over the next two days (31 May - 01 Jun). A return to quiet conditions is anticipated on 02 Jun as CH HSS activity wanes.

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