[wxqc] Madis Check... CW6709

Wed Nov 1 23:33:56 CST 2006

Hey Deb,

In your example, you would raise the pressure by 00.15 inches (not 
milimeters or mm) of Mercury (Hg).  When dealing with altimeter, it is a 
pressure reduced pressure and does not need additional elevation info.

OK, 9 meter (30 foot) MSL elevation and its impact on pressure 
reduction?  Actually, not much.  You can estimate that pressure will 
decrease 00.001 inch of Mercury (Hg) per foot change in elevation near 
sea level. 

Dave
CW0351

Debbie Brooks wrote:

>Thanks Dave, Hows tonight treatin' ya?   Boy, I liked my LaCross station 
>better, than the one I have now-previously-the manual included calibrations 
>and such. I am so non-tech*l* just love the weather, but need my records to 
>reflect accurate conditions - The LaCross station allowed manually setting 
>the altitude into the base-Im at 9 meters above SL, what effect would that 
>have on this -4 mm from normal- Plym is at 29.96mmHg, Marshfield @ 
>29.95mmHg-mines @29.80Hgmm, look forward to hearing more from you*s*
>debs
>
>
>  
>
>>From: Dave Helms <dshelms at comcast.net>
>>Reply-To: Discussion of weather data quality 
>>issues<wxqc at lists.gladstonefamily.net>
>>To: Discussion of weather data quality issues 
>><wxqc at lists.gladstonefamily.net>
>>Subject: Re: [wxqc] Madis Check... CW6709
>>Date: Wed, 01 Nov 2006 20:38:27 -0500
>>
>>Hi Debbie,
>>
>>Here is your station's quality monitoring page:
>>http://weather.gladstonefamily.net/site/C6709
>>
>>The page shows your "average barometric error is 4.1 millibars".  In
>>other words, when you station's (altimeter) pressure and the surrounding
>>station's pressures are averaged together, your station's pressure is
>>4.1 miilibars lower than the neighborhood pressure average.  Ah, but are
>>your neighbors in a conspiracy to deceive you into setting your pressure
>>incorrectly?  Maybe!  The sure thing to do is monitor the nearby airport
>>reports (ASOS and AWOS stations) which have calibrated altimeter
>>pressure reports.  In your case, KPYM (Plymouth Municipal Airport) and
>>KGHG (Marshfield Airport) are the stations you should try to match
>>(during calm winds, not during a storm).
>>
>>You can retreive the latest airport reports using this web page:
>>http://adds.aviationweather.gov/metars/
>>
>>I suggest raising your pressure 4.1 millibars (or 0.12 inches of
>>Mercury, if that is the pressure unit your station console is set to)
>>and see what the QC statistics say about your reports after a week or so.
>>
>>Hope this helps,
>>
>>Dave
>>CW0351
>>
>>Debbie Brooks wrote:
>>
>>    
>>
>>>Hi Dave
>>>
>>>My no. is CW6709, Kingston MA
>>>your email has definately helped-now that my brain is fully caffinated!
>>>Thanks for your timely assistance
>>>justdebs
>>>
>>>
>>>
>>>
>>>      
>>>
>>>>From: Dave Helms <dshelms at comcast.net>
>>>>Reply-To: Discussion of weather data quality
>>>>issues<wxqc at lists.gladstonefamily.net>
>>>>To: Discussion of weather data quality issues
>>>><wxqc at lists.gladstonefamily.net>
>>>>Subject: Re: [wxqc] Madis Check
>>>>Date: Tue, 31 Oct 2006 20:28:37 -0500
>>>>
>>>>For Bunky:
>>>>
>>>>Your pressure is consistently about 9.0 millibars too high:
>>>>http://weather.gladstonefamily.net/site/C5347
>>>>
>>>>... if you lower you pressure by 9.0 millibars (or 0.81 inches of
>>>>Mercury) on your WS2310 console, then your station will get a green
>>>>check and thumbs up (after a few days).
>>>>
>>>>Deb:  Can't help you since I don't know your CW #.
>>>>
>>>>Hope this helps,
>>>>
>>>>Dave
>>>>CW0351
>>>>
>>>>
>>>>Debbie Brooks wrote:
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>>>Bunky
>>>>>
>>>>>me, also I've been reading all the email concerning this madis check,
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>what
>>>>
>>>>
>>>>        
>>>>
>>>>>it is what it's not-but my question is the same as yours
>>>>>Deb CW, no head for remembering numbers*l*
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>>>From: "Bunky  K8SWR" <bunky1267 at gmail.com>
>>>>>>Reply-To: Discussion of weather data quality
>>>>>>issues<wxqc at lists.gladstonefamily.net>
>>>>>>To: wxqc at lists.gladstonefamily.net
>>>>>>Subject: [wxqc] Madis Check
>>>>>>Date: Mon, 30 Oct 2006 15:01:30 -0500
>>>>>>
>>>>>>Hello All I'm new to this group and I have Weather station Lacrosse
>>>>>>WS2310 Weatherstation and i use Weather diplay lite (free Version)  I
>>>>>>run station CW5347   On the Madis Rating I got 2 Thumbs down for my
>>>>>>Barometer reading,,,   Does someone know how to fix this
>>>>>>
>>>>>>--
>>>>>>Bunky  K8SWR
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>>>>>>            
>>>>>>
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