[TowerTalk] WX Sensor Placement

[Bob W5RN]

I found the following links with a quick Google search plus the 
Stevenson screen link which I had bookmarked some time ago.

Stevenson Screen
https://jimboombaweather.com/station/stevenson.html

Proper Siting
https://www.weather.gov/coop/sitingpolicy2

Installing your Personal Weather Station
https://www.wunderground.com/weatherstation/installationguide.asp

The Weather Wunderground seems to be a pretty good sumary.

Bob W5RN

On 3/3/2019 10:37 AM, Gedas wrote:
> This made me wonder about sensor placement. I have had a number of 
> different wx stations and the instructions most provide for the 
> placement of the outdoor temperature sensor is to simply mount it on 
> the north side of the house just under the eaves. This kind of makes 
> sense as it will be away from direct sunlight but what about the heat 
> from the house?
>
> How many do this and does it work for you? Do your temperature 
> readings match those or come very close to an "official" local temp 
> like at an airport.
>
> Has anyone else noticed just how critical the placement of this sensor 
> really is? I have 2-3 outside sensors in different locations and they 
> all read differently, sometimes as much as a 4F delta. I made sure 
> they were all calibrated inside the house to read the same then 
> installed them outside. Once the sun goes down my readings stabilize 
> and my readings are within a degree of the "official" airport 
> temperatures. During the day, esp summer time the readings can be all 
> over the place.
>
> I know enough to keep them out of the sun, away from objects that can 
> absorb & retain heat, off the ground at least 10' or so, not above 
> concrete, etc......and yet I see big differences. So my question is 
> where and how do people mount their temperature sensors?
>
> Also does anyone know where and how the "official" temperature sensors 
> used by the NWS are mounted in places like airports?
>
> Gedas, W8BYA
>
> Gallery at http://w8bya.com
> Light travels faster than sound....
> This is why some people appear bright until you hear them speak.
>
> On 3/3/2019 1:19 PM, Michael Forinash wrote:
>> I bought a Davis Weather Station for my wife, who is a Weatherbird, 
>> seven years ago. As I recall, it was a six hundred dollar unit. In 
>> the past seven years, the only maintenance I have performed on it is 
>> remove a seed (from my neighbor’s tree) that blocks the flow of 
>> moisture through its self-emptying range gauge. It has a solar panel 
>> that recharges the unit’s rechargeable batteries. I have yet to 
>> change them.
>>
>> The unit is attached to a twelve-foot pole.
>>
>> The installation instructions are a little vague on various points, 
>> but that’s the only criticism I can make of this package. Not a cheap 
>> station, but one my wife has been happy with, as the base unit sits 
>> on a end table by her chair in our living room. She checks the base 
>> station five or six times a day when she’s not monitoring the Weather 
>> Channel or the ND DOT online.
>>
>> 73,
>> Mike
>> KB0RIA
>>
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