Hi John, The only problem with the funnel is that it complicates the math. The large aperature to smaller measuring helps keep some of the evaporation from being a factor. Since these are typically checked daily by the pros, it is more about saying that the method can get better resolution of fractions.
I have never heard of a better method than the 5-gallon bucket ( not used by pros for the reason above )- but there may be one. It might also make calibration of the cylinder easier, with a well-measured and waterproof stick. If expense were not an issue, you could use a large clear-glass beaker and ignore the curved bottom. Then 'unwanted critters' could clearly be seen. You might consider putting the brick on either end of the handle of that pail, if you consider that it absorbs a little water. 73 de KB0MNM- Jon BTW- We *used* Davis anemometers for wind speed and direction. They work fine with new bearings replaced annually for precision. The direction can last for a few years. I have no financial interest in Davis, and this situation for my previous employer ( MnDOT/NWS/DHS ) may have changed. ----- Original Message ----- From: "John Parmalee via BVARC" <[email protected]> To: [email protected] Cc: [email protected] Sent: Wednesday, August 30, 2017 11:53:36 AM Subject: Re: [BVARC] Hurricane Harvey Rainfall I think part of an accurate reading is an large aperture. If i recall one on Mt Wilson was about 10" in diameter and had what looked like a foot of snow fence about 18" above and around it to at least have the droplets coming straight down at the funnel. I recall the catch container was 1/10th of the diameter of the funnel and they had a yard stick that was calibrated in very expanded inches. I like the idea of the graduated cylinder, that would work with my funnel on the roof contraption. What is the problem with the funnel? John Parmalee [email protected] 281-380-3811 K5VGM WI2XLJ In a message dated 8/30/2017 11:42:49 AM Central Standard Time, [email protected] writes: The funnel complicates the issue I think.. K5 HEC Sent from my iPad On Aug 30, 2017, at 11:39 AM, John Parmalee via BVARC < [email protected] > wrote: <blockquote> Well here in Hockley I put a five gallon bucket with a brick in it in the middle of the yard. I had to empty it once and almost again for a total of 26.5" I took the brick out to measure. I have always thought I would like to have a funnel on the roof and a tube leading to a calibrated container in the house. John Parmalee [email protected] 281-380-3811 K5VGM WI2XLJ In a message dated 8/30/2017 11:10:15 AM Central Standard Time, [email protected] writes: <blockquote> I have the same setup. The Vantage Pro 2 is complete with instruments and wireless display. The instruments are mounted on the tower at about 20 feet. The display is in the office. I also bought the Vantage VUE wireless display, which works with the Pro. It is located in the shack. I have the Internet cable so I can see what is happening while out of town: http://www.weatherlink.com/user/kdutson/index.php?view=main&headers=1 Click the Summary tab to see the storm rainfall total. It reads a bit less than two other manual rain gauges here. Davis says that is likely caused by being mounted close to a tower leg. I am looking for a stand-off bracket to make the reading more accurate. 73, Keith NM5G -----Original Message----- From: BVARC [ mailto:[email protected] ] On Behalf Of Michael Mustachia via BVARC Sent: Wednesday, August 30, 2017 10:49 AM To: BRAZOS VALLEY AMATEUR RADIO CLUB < [email protected] > Cc: Michael Mustachia < [email protected] > Subject: Re: [BVARC] Hurricane Harvey Rainfall I have two weather stations. Davis Vantage Pro $459.99 and Davis Vantage Vue $269.99. I bought them from Scientific Sales Inc. I think they are in New Jersey. If I am remembering correctly no tax and no freight. They both are very good. The one think to realize about the rain gauge is very accurate in a steady rain. I have compared with Channel 2. However in a heavy or blowing rain the design of all of the gauges will now allow them to keep up with the actual amount of rainfall or the rate. The collector depends on a sort of seesaw with cups on each end. Mike Mustachia KF5PHA -----Original Message----- From: D. Howard Bingham via BVARC Sent: Wednesday, August 30, 2017 1:19 AM To: BRAZOS VALLEY AMATEUR RADIO CLUB Cc: D. Howard Bingham ; [email protected] Subject: Re: [BVARC] Hurricane Harvey Rainfall Anywhere LOCAL where one can find good quality rain gauges, not the small plastic jobs sold at home improvement stores.? Used to be AESHAM used to carry several pages of weather gear in their annual catalog (That I sorely MISS.) 73 Howard Bingham, Deer Park, TX No water in the House, but was wall to wall lake last Saturday morning. --- On 8/29/2017 8:05 AM, Leslie via BVARC wrote: > I am at approximately 32" in League City. No water in the house, > still have power, etc. > Be safe all. > 73 > Leslie , ad5wb > >> On Aug 29, 2017, at 7:33 AM, "Allen F. Mattis via BVARC" >> < [email protected] > wrote: >> >> As of 7:40 AM Aug 29, 2017 I have measured 22.84 inches of rain from >> Hurricane Havey. >> >> Allen N5AFV >> >> >> _ _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Message delivered to [email protected] _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Message delivered to [email protected] _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Message delivered to [email protected] </blockquote> <blockquote> _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Message delivered to [email protected] </blockquote> _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Message delivered to [email protected] </blockquote> _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Message delivered to [email protected]
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