A CME will arrive during daylight at dawn tomorrow plus or minus 7 hours. May be worth following the usual planetary and Boulder kp meters to see if the kp approaches 7 and might be seen in Utah. Kp 6 is iffy in Utah, Kp 7 is visible in Utah. If someone has a Spaceweather phone alert account and gets a signal in the wee hours of the morning, please the alert post here. - Kurt Summary from Spaceweather.com Moving at an estimated speed of 1950 km/s, this CME is expected to sweep up two earlier CMEs already en route. Analysts at the GSFC Space Weather Lab say the combined cloud should reach Earth on August 5th at 13:55 UT plus or minus 7 hours: "The impact on Earth is likely to be major. The estimated maximum geomagnetic activity index level Kp is 7 (Kp ranges from 0 - 9). The flanks of the CME may also impact STEREO A, Mars and Mercury/MESSENGER." High-latitude sky watchers should be alert for auroras. ------------- Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY BULLETIN #11- 1 2011 August 04 at 10:58 a.m. MDT (2011 August 04 1658 UTC) **** GEOMAGNETIC STORM EXPECTED **** Space Weather Bulletin August 4, 2011 NOAA Region 1261, very active over the past few days, produced the third of a sequence of Coronal Mass Ejections (CMEs) and Solar Radio Blackout Events early today. The net effect of that activity is convergent CMEs expected to disturb the geomagnetic field in the early hours, Universal Time (UTC) of August 5. G3 (Strong) Geomagnetic Storm conditions are likely as well as a distinct chance of S2 (Moderate) Solar Radiation Storm levels being surpassed. NOAA 1261 is still in a prime position, relative to Earth, for more geoeffective activity in the next few days. New Solar Cycle 24 is in its early phase now, and this level activity is typical for this time interval. Expect increased space weather activity over the next few years as the Sun erupts more frequently. --------------- Links for kp Planetary kp http://www.swpc.noaa.gov/rt_plots/ Costello index (prediction) http://www.swpc.noaa.gov/rpc/costello/pkp_15m_24h.html NOAA POES Auroral Activity http://www.swpc.noaa.gov/pmap/ Boulder Magnetometer real time http://www.swpc.noaa.gov/rt_plots/bou_12h.html --------------