Product: Weekly Highlights and Forecasts:Issued: 2008 Aug 26 2251 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
18 - 24 August 2008
Solar activity was very low. No flares were detected. The visible
disk was spotless.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during 19 - 24 August.
Geomagnetic field activity ranged from unsettled to minor storm levels on 18 August with major to severe storm periods observed at high latitudes. Activity decreased to predominantly quiet to
unsettled levels during 19 - 21 August, though active to major storm periods were observed at high latitudes on 19 August. Activity decreased to quiet levels during 22 - 24 August. ACE solar wind data indicated a recurrent coronal hole high-speed stream commenced on 18 August. Velocities increased to a maximum of 660 km/sec at 18/1353 UTC, then gradually decreased during the rest of the period with a minimum of 297 km/sec at 24/2309 UTC. Interplanetary magnetic field changes associated with the onset of the high-speed stream included
increased Bt (maximum 12 nT at 18/1040 UTC) and intermittent periods of southward Bz (minimum -10 nT at 18/1013 UTC).
Forecast of Solar and Geomagnetic Activity
27 August - 22 September 2008
Solar activity is expected to be very low.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels during 07 - 12 September and 15 - 22 September.
Geomagnetic field activity is expected to be at quiet levels during 27 August - 04 September. Activity is expected to increase to active levels on 05 September due to a recurrent coronal hole high-speed stream. Activity is expected to decrease to quiet to unsettled levels during 06 - 07 September as the high-speed stream subsides. Quiet conditions are expected during 08 - 11 September. Activity is expected to increase to unsettled levels during 12 - 13 September.
Activity is expected to increase to active to minor storm levels on 14 September due to a recurrent coronal hole high-speed stream. Activity is expected to decrease to unsettled levels during 15 - 16 September as the high-speed stream subsides. Quiet conditions are
expected during 17 - 22 September.
Product: 27-day Space Weather Outlook Table 27DO.txt:Issued: 2008 Aug 26 2252 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2008 Aug 26
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2008 Aug 27 66 5 2
2008 Aug 28 66 5 2
2008 Aug 29 66 5 2
2008 Aug 30 66 5 2
2008 Aug 31 66 5 2
2008 Sep 01 66 5 2
2008 Sep 02 66 5 2
2008 Sep 03 66 5 2
2008 Sep 04 66 5 2
2008 Sep 05 66 18 4
2008 Sep 06 66 12 3
2008 Sep 07 66 8 3
2008 Sep 08 66 5 2
2008 Sep 09 66 5 2
2008 Sep 10 66 5 2
2008 Sep 11 66 5 2
2008 Sep 12 66 8 3
2008 Sep 13 66 8 3
2008 Sep 14 66 20 5
2008 Sep 15 66 10 3
2008 Sep 16 66 8 3
2008 Sep 17 66 5 2
2008 Sep 18 66 5 2
2008 Sep 19 66 5 2
2008 Sep 20 66 5 2
2008 Sep 21 66 5 2
2008 Sep 22 66 5 2
(NOAA)
