Hi MattW and welcome to the forums,
I don't believe there are weatherproof cameras of this specification. Olympus has a few but they all have fairly pedestrian 36-108mm lenses. Do you need a large zoom range or a just a wider starting focal length? 35mm is the average but more and more cameras are coming out with focal lengths of 30mm and under. Panasonic has a nice selection of compacts with wide-angle lenses. The LZ10
starts at 30mm and is relatively inexpensive.
Most compacts have a poor high ISO performance and whether ISO1600 is usable or not is very much up to you. If you ask me, it's not pretty.