Space Weather Forecast Discussion
| Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center |
| Issued: 2018 May 26 0030 UTC |
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| Solar activity was very low with only weak B-class flare activity
observed from both Regions 2711 and 2712. Region 2710 (N17, L=223)
decayed to plage. Region 2711 (N06W55, Cso/beta) indicated decay in its
intermediate and trailer spots. Region 2712 (N14E56, Cao/beta) exhibited
weak leader spot development. No CMEs were observed in available
satellite imagery. |
| Solar activity is expected to remain very low with a chance of C-class
flares all three days (26-28 May). |
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| The greater than 2 MeV electron flux was at normal to moderate levels
while the greater than 10 MeV proton flux remained at background levels. |
| The greater than 2 MeV electron flux is expected to remain at normal to
moderate levels all three days (26-28 May). |
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| Solar wind parameters were indicative of waning influence from a weak
positive polarity CH HSS. Solar wind speed decreased from about 440 km/s
to speeds approaching 350 km/s by periods end. Total field strength
ranged between 1-4 nT while the Bz component varied weakly between +/-2
nT. The phi angle was oriented in a steady positive sector. |
| Solar wind parameters are expected to be at nominal levels on days one
and two (26-27 May). Weak enhancements are expected by day three (28
May) due to weak influence from a positive polarity, southward extension
from the northern crown CH HSS. |
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| The geomagnetic field was at quiet levels. |
| The geomagnetic field is expected to be quiet on days one and two
(26-27 May) under a nominal solar wind environment. By day three (28
May), quiet to unsettled conditions are expected due to weak influence
from a positive polarity, southward extension from the northern crown CH
HSS. |
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