Space Weather Forecast Discussion
Forecast Discussion
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Issued: 2018 May 26 0030 UTC

Solar Activity
.24 hr Summary...
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.
.Forecast...
Solar activity is expected to remain very low with a chance of C-class flares all three days (26-28 May).

Energetic Particle
.24 hr Summary...
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.
.Forecast...
The greater than 2 MeV electron flux is expected to remain at normal to moderate levels all three days (26-28 May).

Solar Wind
.24 hr Summary...
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.
.Forecast...
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.

Geospace
.24 hr Summary...
The geomagnetic field was at quiet levels.
.Forecast...
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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