I know this isn't quite the answer you're looking for, but when I am recording outside on very windy days I always reach for a pair of omnis. Directional mics are more sensitive to wind gusts; even gentle HVAC breezes indoors can sometimes turn into deep bass rumbling. The very best windscreens help a lot, but not as much as switching to omnis.
sideways OT- the bolded part above reminds me to tell you good windscreens can be useful in more than just outdoor situations. I have had a few indoor recordings affected by fan noise either wall or ceiling mounted behind a bar or near a balcony overhang where I had mics placed. My lesson is to almost always run at least a small set of screens indoors (and lately we just run the large BAS Shures indoors as well as out- for loud RnR they don't noticeably affect freq response)
So, buy the best screens you can afford is my advice. (Omnis are not a bad advice too, and Voltronic knows of what he speaks)
When I use my CM3s indoors where I have offending breezes, I use the stock thin foam screens and they are plenty to take care of the gentle gusts without killing the treble.
It's also very helpful to listen with headphones that have very deep bass response to see if you have any of this creeping into your recordings. I thought my old Grados were full-range. Nope. Now when I go back and listen with my sealed Sennheisers, I will hear all kinds of subsonic rumbling in certain recordings. I used to think it was structural, but later came to realize it was wind noise. And it's worth noting that I never get any of this noise on my (indoor) omni tracks.
Recently on GS, one of the pro classical people there posted a blind shootout between a pair of AB omnis and a M/S pair. Even though the omnis have much lower bass response, I only heard the LF rumbling on the M/S tracks. All 4 mics were flown, but none had windscreens.
So yes, get the very best windscreens you can, no matter what mics you're using. But if it's
really windy, you are fighting a difficult battle with directional mics. That's why things like the Rycote Cyclone exist, and there's a reason they're that expensive.