The main wave is not set to hit until am tomorrow morning. If anyone subscribes to www.spaceweather.com phone alerts and you get an alert of current aurora, please post a notice here regardless of the hour. Note the phrase "with a chance for major storm levels beginning midday on 05 August" in the attached NWS solar forecast for today. For one historical aurora that did not reach to SLC's latitude - but that was over the U.S. Canadian border in Montana - I was able to see a curtain wall from SLC with binoculars low to the horizon. - Kurt NWS Space Weather Prediction Center http://www.swpc.noaa.gov/today.html NWS 3-day Solar-Geophysical Forecast issued Aug 04 22:00 UTC . . . . Geophysical Activity Forecast: Geomagnetic field activity is expected to be at unsettled to active levels until midday on day 1 (05 August). [Kurt Note - that is 4 or 5am tomorrow morning.] Activity is forecast to increase to active to minor storm levels with a chance for major storm levels beginning midday on 05 August due to the expected arrival of a CME associated with a large filament disappearance on 01 August. Activity is expected to decrease to unsettled to minor storm levels on day 2 (06 August) as the CME passage continues. A further decrease to quiet to unsettled levels is expected on day 3 (07 August). Other utilities NOAA POES map http://www.swpc.noaa.gov/pmap/ To be seen in Utah, the Kp-index has to be 6 or higher. NOAA Costello Geomagnetic Activity Index (3 hour prospective predictor of global Kp-index) http://www.swpc.noaa.gov/rpc/costello/pkp_15m_24h.html USGS Boulder Magnetometer (Real Time Region Kp) http://www.swpc.noaa.gov/rt_plots/bou_12h.html and of course - http://spaceweather.com/