------------------------------------------------------------------------------ Virgin Islands ------------------------------------------------------------------------------ Date SST HotSpot DHW Alert Level ------------------------------------------------------------------------------ 02/08/2003 26.8 0.0 0.0 No Stress 08/16/2003 28.6 0.1 0.0 Bleaching Watch 11/21/2003 28.1 0.0 0.0 No Stress 08/21/2004 28.9 0.3 0.0 Bleaching Watch 10/09/2004 29.5 1.0 0.5 Bleaching Warning 10/12/2004 29.3 0.7 0.5 Bleaching Watch 10/16/2004 29.6 1.1 1.0 Bleaching Warning 10/26/2004 29.3 0.7 2.0 Bleaching Watch 11/06/2004 28.5 0.0 2.0 No Stress 11/08/2004 28.7 0.2 2.0 Bleaching Watch 11/16/2004 28.3 0.0 2.0 No Stress 01/01/2005 26.9 0.0 2.0 No Stress 05/24/2005 29.1 0.6 0.0 Bleaching Watch 07/26/2005 28.5 0.0 0.0 No Stress 08/02/2005 28.9 0.4 0.0 Bleaching Watch 08/22/2005 29.5 1.0 0.5 Bleaching Warning 09/06/2005 29.3 0.8 2.0 Bleaching Watch 09/09/2005 29.6 1.1 2.6 Bleaching Warning 09/19/2005 30.1 1.6 4.7 Bleaching Alert Level 1 10/08/2005 29.9 1.4 8.2 Bleaching Alert Level 2 10/22/2005 29.4 0.9 10.3 Bleaching Watch 11/18/2005 28.5 0.0 9.3 No Stress 08/22/2006 28.6 0.1 0.0 Bleaching Watch 08/25/2006 28.4 0.0 0.0 No Stress 09/01/2006 29.0 0.5 0.0 Bleaching Watch 09/23/2006 29.7 1.2 0.6 Bleaching Warning 10/09/2006 29.2 0.7 2.7 Bleaching Watch 11/17/2006 28.5 0.0 2.7 No Stress 11/27/2006 28.6 0.1 2.7 Bleaching Watch 12/02/2006 28.5 0.0 2.7 No Stress 06/14/2007 28.6 0.1 0.0 Bleaching Watch 06/21/2007 28.5 0.0 0.0 No Stress 08/02/2007 28.8 0.3 0.0 Bleaching Watch 08/20/2007 28.5 0.0 0.0 No Stress 08/27/2007 28.6 0.1 0.0 Bleaching Watch 11/05/2007 28.3 0.0 0.0 No Stress ------------------------------------------------------------------------------ Information contained in the alerts for a reef site were extracted from 50 km water pixels surrounding or close to the reef site. The center coordinates of the satellite pixel for monitoring this reef site is: SST Pixel latitude: 18.0N SST Pixel longitude: 65.0W A map showing this particular reef site and its satellite pixel is accessible at http://www.osdpd.noaa.gov/PSB/EPS/CB_indices/virg0map.htm ------------------------------------------------------------------------------ This summary of past alerts includes the dates of issuance and their alert levels along with the sea surface temperature, bleaching HotSpot anomaly, and Degree Heating Week values at the time of issuance. The summarized alerts are available starting from February 8, 2003. The SBA became operational on July 24, 2005 and earlier alerts were produced retrospectively. Note: The alert is sent out only when there is a change in the coral bleaching alert level at the site. Definitions of alert levels: --No Stress: No thermal stress (HotSpot <= 0) --Watch: Low-level thermal stress (0 < HotSpot < 1) --Warning: Thermal stress is accumulating (HotSpot >= 1 and 0 < DHW < 4) --Alert Level 1: Bleaching expected (HotSpot >= 1 and 4 <= DHW < 8) --Alert Level 2: Significant bleaching expected (HotSpot >= 1 and DHW >= 8) In the summary table above, if a "*" is shown next to a DHW value, that particular DHW is a record breaking value exceeding the previous maximum DHW at the site since 1985. If the alert level at the time of the record breaking is the same as the previous alert, a special e-mail was issued for announcing the record breaking DHW event. Otherwise, the announcement for the record breaking event was included in the normal alert for the change in thermal stress level. ------------------------------------------------------------------------------ NOAA Coral Reef Watch's Satellite Bleaching Alert (SBA) system website: http://coralreefwatch-satops.noaa.gov/SBA.html Additional information from Coral Reef Watch for this reef site: Coral Bleaching Indices web site: http://www.osdpd.noaa.gov/PSB/EPS/CB_indices/coral_bleaching_indices.html SST and DHW Time Series and SBA archives: http://coralreefwatch.noaa.gov/satellite/current/sstdhwsba_series_24reefs.html All Coral Reef Watch's satellite monitoring products: http://coralreefwatch.noaa.gov/satellite ------------------------------------------------------------------------------ NOAA Coral Reef Watch Last update: 24 July 2008 EDT