Here is an excerpt from an AOM from a 737-800 operator
Crosswind Limitations
Dry - 35 kts
Wet - 30 kts
Note: Limits reduce by 1 kt/metre for runway widths less than 45 metres.
Gusts must be factored as follows:
- 50% of the total gust plus the mean crosswind component value
- the sum of the value (above) must not exceed crosswind limitation.