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I've been using Energizer Ultimates but, according to Consumer Reports, Energizer Advanced lithiums are better. So far I haven't tried them though. https://youtu.be/lR8Wqlez9Og
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CoCoRaHS / Re: SnowByWeight
« Last post by CW2274 on Today at 07:54:26 PM »
Somewhat similar, but whenever I calibrate a rain gauge, I always use volume to get me close, then weight as a fine tune. With a calibrated and precise enough scale, always more accurate than volume.
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CoCoRaHS / Re: SnowByWeight
« Last post by WheatonRon on Today at 07:53:44 PM »
I have used weighing the exterior CoCo gauge for years and it works perfectly. First, weigh the gauge empty, excluding the inner tube and the top—make sure it is clean from debris. In my situation, it weighs 460 grams. When measuring precipitation in the gauge, snow or rain, weigh it. Then deduct the weight of the gauge itself and the result is then divided by 201 to get inches of water. For example, I get up in the morning and get the CoCo gauge, bring it inside, snow and all, then weigh it. If it weighs 500 grams, subtract the weight of the gauge itself (460 grams) results in 40 grams of water content in the CoCo gauge. Divide the 40 by 201 gives you .199 inches of water, rounded, .20. This works year round and is quite simple to calculate.
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CoCoRaHS / SnowByWeight
« Last post by PaulMy on Today at 07:29:00 PM »
Winter season is upon us, so away with the inner tube and on to SWE measuring.

I've been sending to CoCoRaHS since February 2014 and have always used the melting of snow in the outer cylinder to get SWE.
More recent I have just let the snow melt in the outer tube and then submit the results.  This can sometimes take over half an hour.
In a recent emailing CoCoRaHS provided a link to the weighing method SnowbyWeight_v1.0.ppt (cocorahs.org) so decided to get a cheap scale and try it.  This is a scale to 0.5 gram precision and this should be fine as 1 gram = 0.126 mm and the metric precipitation is at 0.2 mm increment.

I've used the weight method the past 3 days and then also continued with the melting to make a comparison.  This seemed fine as both methods were within 0.2 mm.  If you are doing the snow measuring and SWE what is your preference?

Enjoy,
Paul
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Windy.com / Re: Different forecast models within Windy
« Last post by PaulMy on Today at 06:44:36 PM »
I have been posting a daily forecast, including a 5-day forecast... and the results - Today Wednesday:
High temp 3.9°C and Low -3.3°C
Light rain late afternoon.


Quote
Davis VP2+ forecast:
Increasing clouds with little temperature change. Precipitation possible within 24 to 48 hours

Sager forecast:
Fair weather; Wind diminishing, or moderating somewhat if current winds are fresh to strong. North or Northeast winds.

EC forecast:
Today: A mix of sun and cloud. Becoming cloudy near noon. 30 percent chance of rain or drizzle late this afternoon. Wind up to 15 km/h. High plus 5. Wind chill minus 5 this morning. UV index 1 or low.
Tonight: Cloudy with 60 percent chance of rain or drizzle. Wind becoming southwest 30 km/h gusting to 50 late this evening. Temperature steady near plus 4.

The 5-day Forecast for London/Middlesex, Ontario, Canada
Made on Friday for: Wednesday - Considerable cloudiness. Highs 0 to 2C and lows -3 to -1C.
Made on Saturday for: Wednesday - Rain/snow showers in the afternoon. Highs 2 to 4C and lows 1 to 3C.
Made on Sunday for: Wednesday - Rain/snow showers in the afternoon. Highs 2 to 4C and lows 0 to 2C.
Made on Monday for: Wednesday - Rain mixed with snow during the afternoon. Highs 2 to 4C and lows 1 to 3C.
Made on Tuesday for: Wednesday - Chance of afternoon showers. Highs 2 to 4C and lows 1 to 3C.
Made on Wednesday for: Wednesday - Afternoon showers. Highs 3 to 5C and lows 1 to 3C.

Made on Saturday for: Thursday - Showers possible. Highs 5 to 7C and lows -1 to 1C.
Made on Sunday for: Thursday - Showers possible. Highs 5 to 7C and lows -3 to -1C.
Made on Monday for: Thursday - Showers possible. Highs 5 to 7C and lows -2 to 0C.
Made on Tuesday for: Thursday - Showers possible. Highs 8 to 10C and lows -2 to 0C.
Made on Wednesday for: Thursday - Light rain in the morning. Highs 7 to 9C and lows -2 to 0C.

Made on Sunday for: Friday - Mostly cloudy. Highs 1 to 3C and lows -4 to -2C.
Made on Monday for: Friday - Snow showers possible. Highs 1 to 3C and lows -4 to -2C.
Made on Tuesday for: Friday - Mostly cloudy. Highs 1 to 3C and lows -4 to -2C.
Made on Wednesday for: Friday - Snow showers early. Highs 1 to 3C and lows -2 to 0C.

Made on Monday for: Saturday - Snow showers possible. Highs 0 to 2C and lows -6 to -4C.
Made on Tuesday for: Saturday - Chance of a few snow showers. Highs 2 to 4C and lows -5 to -3C.
Made on Wednesday for: Saturday - Cloudy. Highs 1 to 3C and lows -5 to -3C.

Made on Tuesday for: Sunday - Periods of snow. Highs -1 to 1C and lows -5 to -3C.
Made on Wednesday for: Sunday - Mix of rain and snow. Highs 1 to 3C and lows -2 to 0C.

Made on Wednesday for: Monday - Chance of a few snow showers. Highs 0 to 2C and lows -6 to -4C.

Enjoy,
Paul
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Windy.com / Re: Different forecast models within Windy
« Last post by ocala on Today at 06:10:39 PM »
Try the HRRR. It's updated every hour but only goes out 18 hours.

Isn't anything further into the future just Witchcraft?

One of the biggest trends I see in forecasts is the 5 day may be reasonably accurate as to content but it usually ends up not happening until the next day. The 5 day forecast is really the 6th day forecast by the time it happens. I don't think you can make final decision for a weather dependant event much more than 24 hours in advance.

I use HRRR a lot.
Agree 100% The rest is just fictional weather entertainment. However I will give the folks at the TPC kudo's for their track guidance. They have become very good tracking tropical disturbances.
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Hi,

I am thinking about buying a PWS. After some research I conclude that HP2553 (Ultrasonic ) and HP3501 might be a good option.

In order of interest, it would be HP3501, as it has a WS 68 anemometer - conventional - what is unfavorable is the wind reporting time: it is only 16 Seconds from the sensor to the console while on the HP 2553 the sensor reporting interval is smaller: 4.7 Seconds
I have some doubts about the reliability of the HP2553 because it is ultrasonic and also the need to use heating if temperatures drop a lot, to avoid errors. Perhaps the WS 68 anemoter seems less of a problematic. :?:

But now another question arises, since data is sent to the WU every 60s, is it important to have a gap of 4.7seconds ?
I know that the vast majority of PWS have update times between 12 and 16sseconds.

The models I mentioned above, in addition they send data to WU, WeatherCloud/WOW, will they be able to send to a website that I create on a WIX  server or similar?
Thanks for your attention and help.

https://ecowittstore.com/collections/wi-fi-weather-station/products/hp2553-tft-large-display-wi-fi-weather-station-with-ultrasonic-anemometer-sensor-package-and-rain-gauge-sensor

https://ecowittstore.com/collections/wi-fi-weather-station/products/hp3501-tft-wi-fi-weather-station-with-solar-powered-wireless-anemometer-uv-light-sensor-self-emptying-rain-collector

ManP
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Windy.com / Re: Different forecast models within Windy
« Last post by davidmc36 on Today at 05:36:03 PM »
Try the HRRR. It's updated every hour but only goes out 18 hours.

Isn't anything further into the future just Witchcraft?

One of the biggest trends I see in forecasts is the 5 day may be reasonably accurate as to content but it usually ends up not happening until the next day. The 5 day forecast is really the 6th day forecast by the time it happens. I don't think you can make final decision for a weather dependant event much more than 24 hours in advance.

I use HRRR a lot.
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Meteohub/Meteobridge / Re: Meteobridge NanoSD endlessly resetting
« Last post by Mattk on Today at 04:18:36 PM »
See some discussion here regard power requirements https://forum.meteohub.de/viewtopic.php?f=56&t=13795
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Windy.com / Re: Different forecast models within Windy
« Last post by ocala on Today at 04:17:32 PM »
Try the HRRR. It's updated every hour but only goes out 18 hours.
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