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Matt_Cohn

  • Karma: +0/-0
OT: wind adjustment formula
« on: February 21, 2023, 08:23:17 PM »
A friend just suggested a formula to adjust for downwind/into the wind. Into the wind, you add 1% of the yardage for every MPH of wind. Downwind, you subtract 0.5% of the yardage for every MPH.


So into a 12 MPH wind, 150 yards would play 150+(0.01)(150)(12)=168
Down a 12 MPH wind, 150 yards would play 150-(0.005)(150)(12)=141


Anyone heard of this or have any thoughts? Obviously it doesn't account for trajectory...

Erik J. Barzeski

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #1 on: February 21, 2023, 09:00:09 PM »
I think it's close. Close enough for the simplicity of the calculations.

The real question is almostÖ how do you know what 10 MPH is? Or 14? Or 22?
Erik J. Barzeski @iacas
Author, Lowest Score Wins, and Lifetime Student of the Game

Daryl David

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #2 on: February 21, 2023, 09:25:30 PM »
https://www.amazon.com/s?k=anemometer&gclid=CjwKCAiA9NGfBhBvEiwAq5vSywr-eZZaTU4wFeJ3Aj_govgiigr4RFHfwNdIxdpGIpdVfqpVxOF3sxoCilsQAvD_BwE&hvadid=616863167925&hvdev=c&hvlocint=9033665&hvlocphy=9122070&hvnetw=g&hvqmt=e&hvrand=8913477501895808535&hvtargid=kwd-29218596&hydadcr=24665_13611781&tag=googhydr-20&ref=pd_sl_9b30yjg5f7_e


I played with a guy once that had one of these in his bag. Pretty funny when he whipped it out, took a wind reading and then used his range finder. Calculated everything in his head and the pulled a club. Then dumped it short into the pond.  ;D

Pete_Pittock

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #3 on: February 21, 2023, 10:16:28 PM »
https://www.amazon.com/s?k=anemometer&gclid=CjwKCAiA9NGfBhBvEiwAq5vSywr-eZZaTU4wFeJ3Aj_govgiigr4RFHfwNdIxdpGIpdVfqpVxOF3sxoCilsQAvD_BwE&hvadid=616863167925&hvdev=c&hvlocint=9033665&hvlocphy=9122070&hvnetw=g&hvqmt=e&hvrand=8913477501895808535&hvtargid=kwd-29218596&hydadcr=24665_13611781&tag=googhydr-20&ref=pd_sl_9b30yjg5f7_e


I played with a guy once that had one of these in his bag. Pretty funny when he whipped it out, took a wind reading and then used his range finder. Calculated everything in his head and the pulled a club. Then dumped it short into the pond.  ;D


Serves him right for breaking a rule of golf. Is there a formula for how much drag is produced by a fronting water feature or bunker?

Charlie Goerges

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #4 on: February 21, 2023, 11:23:02 PM »
The rule of thumb I was taught was one club for every ten miles per hour of wind into you. As for knowing the wind speed, itís just practice. For me, if itís feeling windy, itís probably 10mph. If Iím raising my voice to talk to others, itís about 20, if flags are ironed out flat, pushing 30, etc.


At my level of golfing skill, thereís no point in getting much more granular than that, and I donít know how anyone is accurate to 1 mph without an anomometer.
Severally on the occasion of everything that thou doest, pause and ask thyself, if death is a dreadful thing because it deprives thee of this. - Marcus Aurelius

Tim Leahy

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #5 on: February 22, 2023, 02:30:41 AM »
The rule of thumb I was taught was one club for every ten miles per hour of wind into you. As for knowing the wind speed, itís just practice. For me, if itís feeling windy, itís probably 10mph. If Iím raising my voice to talk to others, itís about 20, if flags are ironed out flat, pushing 30, etc.


At my level of golfing skill, thereís no point in getting much more granular than that, and I donít know how anyone is accurate to 1 mph without an anomometer.
+1 for me, but Mr. Cohn might be one of those golfers that could might need the wind calculated down to 1 yard. :D
I love golf, the fightin irish, and beautiful women depending on the season and availability.

Niall C

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #6 on: February 22, 2023, 06:19:58 AM »
A friend just suggested a formula to adjust for downwind/into the wind. Into the wind, you add 1% of the yardage for every MPH of wind. Downwind, you subtract 0.5% of the yardage for every MPH.


So into a 12 MPH wind, 150 yards would play 150+(0.01)(150)(12)=168
Down a 12 MPH wind, 150 yards would play 150-(0.005)(150)(12)=141


Anyone heard of this or have any thoughts? Obviously it doesn't account for trajectory...


Matt


I'd suggest it doesn't account for a lot of things and at the end of the day a gut feel based on experience and imagination would count for more.


Niall

astavrides

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #7 on: February 22, 2023, 07:46:51 AM »
There are some books on golf physics, and I remember the part that the OP references about gaining less distance from wind at your back than you lose if you are going into the wind.

Tony_Muldoon

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #8 on: February 22, 2023, 07:59:11 AM »
Agree experience and feel


The other problem is the end is rarely parallel with the hole you are playing,  so if you have to ride the wind how far must the ball travel?




I also find the first 10mph doesn't have much effect on a well struck shot. After that its effect starts to grow exponentially. I can't control my trajectory so ballooning becomes more and more of a problem.
Into the wind if 20mph is 2 clubs, 25 needs 3 and anything above 28 needs 4 or more.


Downwind it's more like 15mph before you can club down and it very much depends on the turf. Once it gets above 25, with the wind right behind no club rises much higher than any other and it's all a matter of feel.  I recall playing from rough well behind the green on the Last par 5 on the Eden. I'd picked a 5iron when 235 from the pin - about 5 clubs less than normal. Without the rough it might still be travelling...
Let's make GCA grate again!

Cliff Hamm

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Re: OT: wind adjustment formula
« Reply #9 on: February 22, 2023, 08:49:10 AM »
https://www.wkbn.com/weather/weather-for-kids-how-to-use-a-flag-to-find-the-wind-speed/#:~:text=If%20the%20flag%20flaps%20lightly,is%2032%20to%2037%20mph.

keep in mind size and weight of flag will have an effect...so a golf flag will be out right before a heavy flag.  Also, wind above the tree line is of most import....

Tim Martin

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #10 on: February 22, 2023, 10:30:54 AM »
Playing uphill adds another dimension to the calculation as Iíve always gone by adding one club for every fifteen feet of elevation or roughly one story. Very difficult to judge when factoring in both elevation change and wind speed.

Sven Nilsen

  • Karma: +0/-0
Re: OT: wind adjustment formula
« Reply #11 on: February 22, 2023, 11:22:49 AM »
High ball hitters need to add more. 


Wind adjustment is highly subjective.
"As much as we have learned about the history of golf architecture in the last ten plus years, I'm convinced we have only scratched the surface."  A GCA Poster

"There's the golf hole; play it any way you please." Donald Ross

Jeff_Brauer

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Re: OT: wind adjustment formula
« Reply #12 on: February 22, 2023, 11:42:15 AM »
You can trust the wind about as much as a riverboat gambler, but I agree the basic formula is about right.  I mean, you have to do something to take wind into account, and when in doubt, add yet another club in a headwind.
Jeff Brauer, ASGCA Director of Outreach

Tim Gavrich

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Re: OT: wind adjustment formula
« Reply #13 on: February 22, 2023, 12:01:17 PM »
I hit a stock 7 iron about 170 yards and a stock 6 iron about 180. On the hypothetical example of a 150-yard shot into a 12mph wind that is "playing" 168, in the last couple of years, I've noticed that that situation calls for a ~170 shot, but with a 6 iron instead of 7.


In other words, into that wind I'm trying to hit a 170-yard shot, but with the 180-yard club. That approach helps me hit it pin-high into the wind more often, FWIW.
Senior Writer, GolfPass

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