Original sentence: In April 2010  Al Gore posted a Twitter message  quoting a NOAA source which stated that April 2010 had the lowest snow cover on record; blogger for National Reivew online noted heavy snowfall in Colorado and Wyoming shortly afterward
Edited sentence: In April 2010 a Twitter message of Al Gore  quoting a NOAA source claiming April 2010 having the lowest snow cover on record was met with heavy snowfall in Colorado and Wyoming shortly afterward