Author Topic: Resource For Interpreting Graphs  (Read 157 times)

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Offline modean987

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Resource For Interpreting Graphs
« on: September 16, 2020, 11:15:10 AM »
Moderator: Please move to proper sub-forum if this is not the correct place to ask about this.

I've got my GW10002 up-n-running, made my WU and Ecowitt accounts, and an now seeing graphed data. While the graphs are easy enough to figure out, there's some weird things in them that I don't understand and would appreciate any links to reference materials that will teach me how to better interpret these graphs.

For example, yesterday 15 September 2020, I got these wind readings. Wind direction starts out consistent and then for several hours it looks like an old Pong game! Also, the wind gusts seem to be consistently, well, gusting. Is that normal?

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Then there's the UV/Solar graphs. Looks good... goes up and up and up as the day progresses and then comes down as evening arrives. But what's up with those sharp drops at 12:30 pm and during 4-4:30pm. Is that normal?

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Inquiring minds want to know why! :grin:

Ecowitt: GW1002, WH41, WH57
ecowitt.net, pwsweather.com, wunderground.com

Offline Autofill

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Re: Resource For Interpreting Graphs
« Reply #1 on: September 16, 2020, 11:20:17 AM »
the sharp drops could be a cloud or something (i.e. plane, bird etc.) creating shade momentarily. Normal if its actually something blocking the sun.

Gust is wind that sustained for 20 seconds or less. Wind is more constant (i.e. > 20 seconds). Looks normal to me (including the direction).

Wind is very very local, i.e. the wind you experience is probably not the same wind your neighbor experiences.
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Online Rover1822

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Re: Resource For Interpreting Graphs
« Reply #2 on: September 16, 2020, 11:25:29 AM »
It would help a bit if you provided a "wide" photo / image that shows your station and the surroundings.
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EcoWitt: GW1000 x3,WH31 x2,WH57,WH51 x8, WH40,WH5360B
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Offline modean987

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Re: Resource For Interpreting Graphs
« Reply #3 on: September 16, 2020, 11:34:09 AM »
the sharp drops could be a cloud or something (i.e. plane, bird etc.) creating shade momentarily. Normal if its actually something blocking the sun.

I was hoping it was something like that. We did have several large clouds forming yesterday. It was probably one of those. Now I know what to expect in that regard.

Gust is wind that sustained for 20 seconds or less. Wind is more constant (i.e. > 20 seconds). Looks normal to me (including the direction).

Good to know. I had no clue if the gusting dots were normal or not. I was hoping it wasn't because the unit was bouncing around -- the mount is temporary but shouldn't bounce in the calm breezes we're having. I plan to get a more permanent solution in place today or tomorrow.

Wind is very very local, i.e. the wind you experience is probably not the same wind your neighbor experiences.

I noted this when reviewing other local stations. My concern was how the direction bounced back and forth between the 0 and 360 degree areas..... ahhhhhhhh! It wasn't really bouncing back and forth.... it's a circle and 360 is just the other side of zero! #-o

Needless to day, I'm a real newbie at this and worry about whether my gear is A) working properly and B) mounted properly to preclude false data readings. Thanks for helping me figure it out!

Ecowitt: GW1002, WH41, WH57
ecowitt.net, pwsweather.com, wunderground.com

Offline modean987

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Re: Resource For Interpreting Graphs
« Reply #4 on: September 16, 2020, 11:49:11 AM »
It would help a bit if you provided a "wide" photo / image that shows your station and the surroundings.

The mount is temporary at this point. It's secure enough not to wobble about in the calm breezes we've had but won't stand up to real gusts. I'm going to the hardware store today to get the permanent mounting hardware. I'll post a photo once I get the permanent mount done.

Basically, I'm going to try to "kennel clip" two 5 or 6 foot lengths of galvanized pipe to a 2-3/4 chain link fence corner post (rock solid). That'll get it above the shed and mesquites and the 5 foot of bottom pipe secured to the fence post should ensure there's minimum sway at the top. I should be able to unscrew the pipe sections to do maintenance on the unit. We'll see -- the best laid schemes o' mice an' men gang aft agley

As for my wind questions, being the newb I am, I equated the linear graph with the weather vane ping-ponging back and forth between zero and 360 and now realize 0 and 360 are next to each other on a circle.  :lol:
Ecowitt: GW1002, WH41, WH57
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Offline kenthcwx

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Re: Resource For Interpreting Graphs
« Reply #5 on: September 16, 2020, 06:07:24 PM »
Quote

For example, yesterday 15 September 2020, I got these wind readings. Wind direction starts out consistent and then for several hours it looks like an old Pong game! Also, the wind gusts seem to be consistently, well, gusting. Is that normal?

Wind direction like that is perfectly normal, nice & mostly clumped together & not completely all over the place. Mine is usually all over the place due to houses in the way. Yours is positioned much better!  :grin:


Quote
Then there's the UV/Solar graphs. Looks good... goes up and up and up as the day progresses and then comes down as evening arrives. But what's up with those sharp drops at 12:30 pm and during 4-4:30pm. Is that normal?

Yes, it's either a bit of cloud or something else blocking the sun from hitting the station. Could be a building, etc.

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Offline modean987

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Re: Resource For Interpreting Graphs
« Reply #6 on: September 16, 2020, 06:25:17 PM »
Quote
Then there's the UV/Solar graphs. Looks good... goes up and up and up as the day progresses and then comes down as evening arrives. But what's up with those sharp drops at 12:30 pm and during 4-4:30pm. Is that normal?

Yes, it's either a bit of cloud or something else blocking the sun from hitting the station. Could be a building, etc.

Thanks for that observation. Yesterday, the downward spike happened at 12:54pm. Today, there was a smaller one at about 1:19pm. I don't think they're related, so I'm going with it being a cloud shadow. Just the same, I'll watch the graph and to see if there's a recurring pattern.
Ecowitt: GW1002, WH41, WH57
ecowitt.net, pwsweather.com, wunderground.com

 

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