Well, to get a Tx output of anything like 10kW you'd need a whacking great old-fashioned microwave tube, e.g. a TWT, Magnetron, CFA etc., which would certainly cook you nicely...
I might be wrong but I think the WXR-2100 is a phased array system equipped with solid-state Tx/Rx modules which tend to produce a much lower power, certainly along the lines of the quoted 150W peak.
Added to the tiny pulse width, you have a very low average power. Still not a good idea to stand in front of one IMO, but there again I want to err on the side of safety so I can have kids when the time's right...
Microwave tubes tend to be a thing of the past these days, all solid-state now.
Funny how it's always the same folk who post on radar threads...
Smithy