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jims said..
Yeah, but A) it's hard to pass up a 20-30mph day on my favorite board (a little 71L fin board), and B) by the time it's in the mid/upper-20's, I'm on my 4.3 sail on my fin board, and my smallest sail is a 3.6, which I fear would be too much got m on the foil in strong winds right now.
I agree with you. After a couple of hundred foil sessions, I still prefer to windsurf when the wind picks up to mid-20s or more.
There are a couple peculiarities about OBX that support your decision even more. One is the nature of the chop there. Due to the water being shallow (even in areas where you can foil, I can often touch the ground), the chop is not very high, but it's very tightly spaced, and often slightly chaotic. That does affect the foil, making rides slower and less fun that in either flat conditions, or with higher chop that's more widely spaced.
The other issue is that mid-20 readings from iWindsurf meters in OBX often feel a lot stronger than mid-20s at most other places. That does not seem to make much sense, but I got this impression on pretty much every single on of my ~ 20 trips to OBX (261 sessions). Up to low 20s, the readings are comparable to typical reading in Cape Cod or Texas, but above, it often seems that I should use a sail size smaller in OBX. Eventually, I realized that the difference is probably due to the meter location and elevation. In OBX, I rely on mostly on the Real Slicks and the Avon Sound meters, which are on the water, about 5 meters above the water. Most other iWindsurf meters I use are on buildings, about 10 meters above ground (this is just about onshore wind directions where all meters have a good fetch). There is a considerable gradient in wind strength which depends on the surface roughness, which remains the same for on-shore meters, but varies a lot for the OBX on-water meters. In 15-20 mph, the water in OBX tends to be nice and flat. That means the wind speed gradient is
lower than on shore, and the readings at 5 meter show about the same numbers as 10 m on-shore readings for Cape Cod and Texas. But when OBX reading show 25+ mph, you have considerable chop; at the long distance races, I'd usually switch from slalom gear to FSW gear when it was that windy. The higher chop increases the surface roughness, and therefore the wind gradient, reducing the measurements at 5 meters. So when the Avon Sound or the Real Slicks meter reads 25 mph in a SW wind, the meter at Kalmus may well read 28-30 mph.
So have fun on the slapper!