It may sound a bit pedantic but I think you'll find the C152 max demonstrated cross wind limit is 15mph not knots (ie 12kts or so).
It would make for an interesting insurance claim if the TAF/METARs exceeded the max demonstrated limit and an aircraft was damaged - even if it wasn't as a result of the cross wind.
Years ago someone reckoned on another forum the max demonstrated cross wind limit was set on the day of the FAA-observed flight test so could only be as much as the wind was blowing on the day - doh!