Author Topic: Old Fashioned Weather Station  (Read 51715 times)

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Offline alexstaar

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Re: Old Fashioned Weather Station
« Reply #125 on: May 09, 2016, 12:06:33 AM »
Any wind data before it was destroyed? My highest wind speed recorded was a nighttime heat burst from decaying TS. 1:30 AM June 20th, temperature shot up and recorded 62 mph wind.

Just checked your archives on WU. This "heat burst" you describe could have been a bore passage. Bores are wave like features that occur at night within a stable boundary layer through which they propagate. It's passage mixes the boundary layer and mixes warmer air aloft down to the surface. What's interesting is that the temp then fell pretty quickly after it's sharp rise. I'll have to look at some radar data to see what was going on in the area at the time. Whatever this boundary was may not have been a bore, but could have been enough to have this same mixing effect.
-Alex

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Offline ValentineWeather

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Re: Old Fashioned Weather Station
« Reply #126 on: May 09, 2016, 12:26:43 AM »
Thanks Alex. One of the North Platte meteorologist thought it may of been a heat burst. All I remember was there was TS activity in area and looks like a frontal boundary possible with the drop in temperatures and pressure rise at same time.  I'll include graphs for others. It still stands as my highest wind speed and the house shook pretty good.   
Randy

Offline Jim's Weather

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Re: Old Fashioned Weather Station
« Reply #127 on: May 09, 2016, 09:53:58 AM »
No wind speeds were recorded during the event. Thunderstorms were training over the area and the previous one knocked power out to the site. It did come back online by itself once power was restored. It just wasn't providing very good data.  :lol: Everything had to be replaced except the RPU electronics, temperature/humidity sensor and the RM Young sensor.

I did talk to the farmer whose field is behind the tower and asked him about the wind speed. He said he had no idea but that he was home and it scared the <blank> out of him.  :lol: I said well that satisfies my curiosity enough. I walked his field and noticed most of the tall plants, grasses were heavily leaning towards the north. The tower fell towards the north. I drove a few miles south and noticed most of the tall grasses, plants were leaning south. Almost in a flattened state.
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Offline miraculon

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Re: Old Fashioned Weather Station
« Reply #128 on: May 09, 2016, 11:13:54 AM »
No wind speeds were recorded during the event. Thunderstorms were training over the area and the previous one knocked power out to the site. It did come back online by itself once power was restored. It just wasn't providing very good data.  :lol: Everything had to be replaced except the RPU electronics, temperature/humidity sensor and the RM Young sensor.

I did talk to the farmer whose field is behind the tower and asked him about the wind speed. He said he had no idea but that he was home and it scared the <blank> out of him.  :lol: I said well that satisfies my curiosity enough. I walked his field and noticed most of the tall plants, grasses were heavily leaning towards the north. The tower fell towards the north. I drove a few miles south and noticed most of the tall grasses, plants were leaning south. Almost in a flattened state.

Interesting. I was trying to make sense out of the wind load chart on the Glen Martin MF-1331 web page. The square feet (allowed?) at the various speeds "max projected area" seem to indicate that only 1 sq. ft. is OK at 110 mph. I suspect that the NEMA box alone is larger than that. I don't know what all of the mast items add up to but that tower might be good up to 100 mph or so, depending on the area.

I am glad to hear that the RM Young survived. One tough bird!

Greg H.


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Offline Jim's Weather

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Re: Old Fashioned Weather Station
« Reply #129 on: May 09, 2016, 12:37:14 PM »
Someone once told me that tower wind load was based on what was on top the tower in sq ft. I was going to try calculate the sq ft on the tower to come up with a probable wind speed. Then I had this thought that allowed sq ft would probably increase at a particular wind speed as you go down the tower. My thinking is that the NEMA box would put much more wind load on the tower at 30 feet than it does at 5 feet. Then it got complicated enough that I didn't care anymore to figure it out.  :lol:
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Offline alexstaar

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Re: Old Fashioned Weather Station
« Reply #130 on: May 09, 2016, 10:32:11 PM »
Thanks Alex. One of the North Platte meteorologist thought it may of been a heat burst. All I remember was there was TS activity in area and looks like a frontal boundary possible with the drop in temperatures and pressure rise at same time.  I'll include graphs for others. It still stands as my highest wind speed and the house shook pretty good.

Very interesting indeed. How often do you archive data locally (1 min, 5 min, 10 min...)? Would be interesting to see the higher resolution data. Sorry for going off topic again!
-Alex

Davis 6153 VP2 with 24-hour FARS/
Davis 6250 Vantage Vue
WU: KNJMOUNT68/KSCGREER81
CWOP: FW5135/EW6390
www.uah-mcthornmoracres-weather.com

Offline Jim's Weather

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Re: Old Fashioned Weather Station
« Reply #131 on: May 09, 2016, 10:43:31 PM »
Thanks Alex. One of the North Platte meteorologist thought it may of been a heat burst. All I remember was there was TS activity in area and looks like a frontal boundary possible with the drop in temperatures and pressure rise at same time.  I'll include graphs for others. It still stands as my highest wind speed and the house shook pretty good.

Very interesting indeed. How often do you archive data locally (1 min, 5 min, 10 min...)? Would be interesting to see the higher resolution data. Sorry for going off topic again!

No prob! Interesting stuff. I'll have to see if I can find the video I took of my Weather Monitor II console recording a 112 mph wind in a derecho. I didn't even know it had 3 digits for wind on the LCD.  :lol:
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Offline alexstaar

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Re: Old Fashioned Weather Station
« Reply #132 on: May 09, 2016, 10:54:54 PM »
Thanks Alex. One of the North Platte meteorologist thought it may of been a heat burst. All I remember was there was TS activity in area and looks like a frontal boundary possible with the drop in temperatures and pressure rise at same time.  I'll include graphs for others. It still stands as my highest wind speed and the house shook pretty good.

Very interesting indeed. How often do you archive data locally (1 min, 5 min, 10 min...)? Would be interesting to see the higher resolution data. Sorry for going off topic again!

No prob! Interesting stuff. I'll have to see if I can find the video I took of my Weather Monitor II console recording a 112 mph wind in a derecho. I didn't even know it had 3 digits for wind on the LCD.  :lol:

Wow, that must have been a bit scary to witness!  :shock:
-Alex

Davis 6153 VP2 with 24-hour FARS/
Davis 6250 Vantage Vue
WU: KNJMOUNT68/KSCGREER81
CWOP: FW5135/EW6390
www.uah-mcthornmoracres-weather.com

Offline ValentineWeather

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Re: Old Fashioned Weather Station
« Reply #133 on: May 10, 2016, 04:20:01 AM »
Thanks Alex. One of the North Platte meteorologist thought it may of been a heat burst. All I remember was there was TS activity in area and looks like a frontal boundary possible with the drop in temperatures and pressure rise at same time.  I'll include graphs for others. It still stands as my highest wind speed and the house shook pretty good.

Very interesting indeed. How often do you archive data locally (1 min, 5 min, 10 min...)? Would be interesting to see the higher resolution data. Sorry for going off topic again!

I do now every 30 seconds but not back then.
Randy

Offline Jim's Weather

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Re: Old Fashioned Weather Station
« Reply #134 on: May 10, 2016, 12:14:55 PM »
Apparently I made someone happy this morning.  :lol:

She does have her own visibility and present weather sensor on her PWS so those readings are not from the airport.

« Last Edit: March 09, 2017, 09:46:04 PM by kcidwx »
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Offline rlund

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Re: Old Fashioned Weather Station
« Reply #135 on: April 25, 2019, 07:58:46 AM »
I am interested in purchasing your Heathkit IDW-2090 Digital Barograph kits, either or both. I live in Alaska and these would make wonderful addition to my weather station! Best Regards, Richard