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Personal Weather Station Links / Re: Nimbus MMTS, Davis 7714, Davis DIY FARS compare
« Last post by CW7491 on Yesterday at 10:42:59 PM »
It is crazy. Did you notice the picture of the RAWS site they disqualified? I can’t speak to the instrumentation, but the siting looks exceptional. I’ve been waiting, for years now, on the 130°F Death Valley temp. The climate extremes committee are looking at one from 2020 and 2021. Still nothing out. Speculation that they might be considering decertifying the 134°F record.
https://stormbruiser.com/chase/2023/11/29/the-death-valley-temperature-record-is-being-fought-over/

In any case, the Furnace Creek station used the CS215 temp/rh probe which utilizes the SHT75. It’s crazy to me they were using that sensor (in a tiny, poorly sited passive shield) at a climate station with that kind of public interest.

At least Dr Baker and Campbell Scientific seem to have a serious interest …
https://www.campbellsci.com/blog/death-valley-collaboration-update
https://stormbruiser.com/chase/2022/09/06/detailed-afternoon-temperature-comparisons-at-furnace-creek-in-death-valley-in-july-2021/

But I digress …
12
Ambient Weather and Ecowitt and other Fine Offset clones / Re: Will the real pressure please stand up?
« Last post by Mattk on Yesterday at 10:14:32 PM »
Quote from: CW2274 on Yesterday at 09:47:23 PM
Quote from: Mattk on Yesterday at 09:38:44 PM
Quote from: CW2274 on Yesterday at 07:53:51 PM
.... Aviation had to get it right. It's used for vertical separation from other aircraft and terrain below 18,000' (FL180).

But QNH and associates are not set and forget, an aircraft requests/sets QNH to take off, then an area QNH, then the local QNH prior to landing.
Please explain to me this relevance to a PWS owner.

Exactly, so why did you actually raise or mention it then? PWS owners are not interested in Aviation matters why did you even mention it?
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Personal Weather Station Links / Re: Nimbus MMTS, Davis 7714, Davis DIY FARS compair
« Last post by ValentineWeather on Yesterday at 09:47:26 PM »
WOW, I can't believe they accepted the UTAH record High from that location. Notice the FARS read about a degree lower, so they thought it was all good. WHAT? That location doesn't meet siting guidelines for temperature or rainfall.
And that's a block fence, they get hotter than hell. And so close to the house.
I don't get it at all.
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Ambient Weather and Ecowitt and other Fine Offset clones / Re: Will the real pressure please stand up?
« Last post by CW2274 on Yesterday at 09:47:23 PM »
Quote from: Mattk on Yesterday at 09:38:44 PM
Quote from: CW2274 on Yesterday at 07:53:51 PM
.... Aviation had to get it right. It's used for vertical separation from other aircraft and terrain below 18,000' (FL180).

But QNH and associates are not set and forget, an aircraft requests/sets QNH to take off, then an area QNH, then the local QNH prior to landing.
Please explain to me this relevance to a PWS owner.
15
Ambient Weather and Ecowitt and other Fine Offset clones / Re: Will the real pressure please stand up?
« Last post by Mattk on Yesterday at 09:38:44 PM »
Quote from: CW2274 on Yesterday at 07:53:51 PM
.... Aviation had to get it right. It's used for vertical separation from other aircraft and terrain below 18,000' (FL180).

But QNH and associates are not set and forget, an aircraft requests/sets QNH to take off, then an area QNH, then the local QNH prior to landing. I just wisthpeople wouldn't keep on confusing people with such stuff that is really not relevant to the normal everyday weather station user. 
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Davis Instruments Weather Stations / Re: Weather Observer's Handbook 2nd Ed
« Last post by saratogaWX on Yesterday at 08:37:45 PM »
Even the Kindle version is expensive (but I pre-ordered it).  Got to feed the weather itch :)
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Weather Website PHP/AJAX scripting / Re: Warning: Undefined array key "properties" in advforecast2.php on line 2412
« Last post by saratogaWX on Yesterday at 08:33:50 PM »
Good... also change ORZ008 to ORZ118 and KEC42 to ORC039 for the NWS alerts too in Settings.php
Quote
$SITE['NWSalertsCodes'] = array(
    "Southern Willamette Valley|ORZ008|KEC42"
//  "Santa Clara Valley|CAZ513|CAC085",
//  "Santa Cruz Mtns|CAZ512|CAC081|CAC085|CAC087",
//  "Santa Cruz|CAZ529|CAC087",
//  "Monterey|CAZ530|CAC053",
//  "South/East Bay|CAZ508|CAC081",
//  "San Mateo Coast|CAZ509|CAC081",
//  "San Francisco|CAZ006|CAC075"
);
to
Quote
$SITE['NWSalertsCodes'] = array(
    "Southern Willamette Valley|ORZ118|ORC039"
//  "Santa Clara Valley|CAZ513|CAC085",
//  "Santa Cruz Mtns|CAZ512|CAC081|CAC085|CAC087",
//  "Santa Cruz|CAZ529|CAC087",
//  "Monterey|CAZ530|CAC053",
//  "South/East Bay|CAZ508|CAC081",
//  "San Mateo Coast|CAZ509|CAC081",
//  "San Francisco|CAZ006|CAC075"
);
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Personal Weather Station Links / Re: Nimbus MMTS, Davis 7714, Davis DIY FARS compair
« Last post by CW7491 on Yesterday at 08:22:57 PM »
Yeah, that's just not right. To be honest, it's not that surprising considering the NWS is using equipment manufactured by a company that went defunct nearly 15 years ago. It comes down to cost I assume. Lots more user friendly technology available now with the ability for better siting. The issues with the current MMTS system have been documented. Although the radiation shield seems to work well. Even Davis published a study in comparison around 2007 and ran into problems https://ams.confex.com/ams/87ANNUAL/techprogram/paper_118190.htm

I was also surprised they accepted this COOP MMTS tying of the Utah state temperature record on siting alone ...
https://www.ncei.noaa.gov/monitoring-content/extremes/scec/reports/20220708-Utah-Maximum-Temperature.pdf

ASOS isn't immune either though as I posted elsewhere a really interesting video from NWS Lexington KY documenting the extremely lax tolerances. At least a fix there is in the works ...
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Ambient Weather and Ecowitt and other Fine Offset clones / Re: Will the real pressure please stand up?
« Last post by CW2274 on Yesterday at 07:53:51 PM »
Quote from: gszlag on Yesterday at 07:29:05 PM
I guess the point I was making (or trying to make) is the term “sea level pressure” applies to both Altimeter setting and SLP. SLP is called sea level pressure (Aviation Weather Center) - that's what S-L-P stands for, but Altimeter is also “sea level pressure.” In other words, both are converted down to sea level.

I think the aviation industry got it right; QNH = QNH and QFF = QFF. No confusion there and no head scratching about sea level pressure, barometric pressure, etc, etc.
I get what's trying to be conveyed. Problem is, they're not the same. I think a lack of further explanation here (by whomever) has some people thinking that they actually are. For instance, my altimeter right now 29.82, but my SLP is 29.62. Quite the difference.

Aviation had to get it right. It's used for vertical separation from other aircraft and terrain below 18,000' (FL180).
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Weather Website PHP/AJAX scripting / Re: Warning: Undefined array key "properties" in advforecast2.php on line 2412
« Last post by staze on Yesterday at 07:51:42 PM »
Hey @saratogaWX,

Thank you! I thought I confirmed it was still 008 yesterday, but maybe I looked in wrong place.

Can confirm that fixes the error!

Thank you again!
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