Radar shows the storms passing through about 06.50 UTC
128km Radar Loop for Dampier, 04:00 21/02/2011 to 12:00 21/02/2011 UTC
256km Radar Loop for Port Headland, 00:00 21/02/2011 to 12:00 21/02/2011 UTC
There are three soundings from Port Hedland which give a great insight into the conditions.