I have some reasonable open space near and around my home and it should be in a place where it catches a good percentage of the wind from most directions other than from E/NE direction. On windy days where the local readings are gusts in the 30-40mph range I never scratch a reading above maybe 20-22mph. I've had days where the gusts are 50-60 during crazy wind and front situations. I still don't see things beyond the low/mid 20mph range indicated by my 3-1 sensor.
I've resigned myself that these simply don't capture accurate wind readings. Just wondering if any of you, whether 3-1 or 5-1 owners, feel you never really capture accurate wind readings.
That said, you'd have to understand the layout of my land and location of my sensor. Today was 43 degrees in the upper midwest which is 13 degrees above the norm and this warmer air was brought in by these strong south winds. My sensor will almost fully catch south winds. Those trees are not blocking the wind as they are catching the same wind as sensor is. That building you see in the background is south of me but is a full 200 yards behind my fence and there is nothing south of it for another full mile. If anything strong winds flowing over a flat roof like that will have an accelerated down draft as it clears and pushes down the back of the building. While I didn't necessary expect to register 30mph wind gusts consistently, given the direction of the wind and location of my sensor I should have picked up a few readings where my sensor caught a full gust of wind of 30 mph or at least 25 mph at some point across the day. In fact, I'm sure it hit that level near the ground based on what I felt walking out in my backyard. I didn't even register anything higher than 16mph all day when there were mid 30 mph gusts through much of the day.
I'd like to know from anyone out there if they believe they get accurate wind speeds on their 3-1 or 5-1. Maybe I'm being unrealistic about it but I'm questioning the general accuracy of the wind sensor.
I have several davis weather instruments -- the size of the cup matters -- some are good for higher speeds others at lower speeds. I think even a few feet away can make a difference in wind speed --- that's what I find -- I have 7 different anemometer sensors on my roof -- that don't all match up wind speed-wise
When comparing your weather station data against another local source, it's important to compare against a weather station that is using a sensor positioned at the same exact mounting height as yours. Note that professional weather stations are typically mounted 30 feet high, or more. When you are comparing your wind speed readings to your local readings they are typically mounted out in the middle of an open field with no obstructions around them for several 100 feet. Living in a residential area we understand not all of our customers are able to do that. You are probably seeing the correct wind speed reading for your location. We have included a chart to show you how much it can make a difference. Please let us know if there is anything further we can assist you with. Enjoy your day!
Separately, but likely related, here is something interesting. Again, south winds the other day and I was seeing a peak of 14mph on my monitor. However, the reading for my location on WeatherUnderground was showing 24mph! And the MyAccurite app also had my 3-1 with a 24mph reading. Why would my monitor be showing something that is as much as 40% off from what the 3-1 is delivering to WU or to MyAccurite?? The 3-1 is the source for reporting to all three places - the displays, WU, and MyAccurite app. Why wouldn't my "peak" wind for the last 30 minutes not be showing 24mph??
While I don't expect my unit placed at 15 feet to necessarily capture fully peak winds often it should happen at least sometimes. The fact that on a crazy windy day - like 40-50+ mph conditions - my unit NEVER captures anything the mid-high 20s. Certainly there are a few times during the day when my unit would get slammed with 40 mph winds at 15ft. One of these days I'm going to extend my unit off my chimney which will be above the recommended 33 feet. I can almost guarantee it still won't represent peak winds accurately.