[ips-sf] SWS Summary Forecast for 17 May - issued 2340UT/16-May-2017 [SEC=UNCLASSIFIED]

[rwc]

Solar activity was very low today (UT day 16 May). Due to the
continued effect of a positive polarity recurrent coronal hole, solar
wind stream stayed strong today. Solar wind speed is expected to stay
enhanced over the next 3 days due to the effect of the currently
geoeffective coronal hole and due to a possible effect of the CME
observed on 13 May. Very Low levels of solar activity are expected for
the next three days (17 to 19 May). Despite a strong solar wind
stream, geomagnetic conditions did not rise to the expected levels on
16 May. Geomagnetic activity may rise to minor storm levels on 17 May
with some possibility of major storm periods. Geomagnetic activity is
expected to gradually decline to lower levels on the following two
days (18 and 19 May). Minor to mild MUF depressions were observed in
the low- and mid-latitude regions today (16 May). Minor to mild MUF
enhancements were observed in the mid- to high-latitude regions on
this day. Minor to moderate MUF depressions and degradations in HF
conditions may be expected from 17 to 18 May due to expected continued
rise in geomagnetic activity levels on these days. MUFs and HF
conditions are expected to gradually recover to mostly normal levels
on 19 May.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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