With regards to the crosswind at 90 degrees to the runway; bear in mind the following:

--the wind direction may vary up to but (but not including??) 60 degrees without this being reportable in a metar. A left direct crosswind of 10G20 could veer up to 30 degrees, which would yield a HWC of 5G10, legally without any mention of this in the metar. It could also back bu the same amount, yielding a max TWC of 5G10. Ie total shear in headwind could be .... 10G20!

-- when crabbing on final in a direct crosswind (compared to the runway), the wind is not directly across compared to you, i.e. the gust would have a headwind component.

-- gusts tend to veer compared to the mean wind direction in the northern hemisphere

-- gusts that are the result of showers or mechanical turbulence may just as likely change direction as intensity.

Tell me about it....I need a payrise now you mention it:suspect: