REC: 2025-08-24 08:50:00 EDT (1756039800) 'altimeter': '30.029532326429237', 'appTemp': '72.57562147734592', 'barometer': '29.981221699640386', 'cloudbase': '2929.6889799923492', 'dateTime': '1756039800', 'dewpoint': '63.31536848803366', 'ET': 'None', 'heatindex': '68.495', 'humidex': '78.03578397157159', 'inDewpoint': '54.71694388930514', 'inHumidity': '61', 'inTemp': '68.72', 'interval': '5', 'maxSolarRad': '315.9994602721425', 'outHumidity': '85', 'outTemp': '68.0', 'pressure': '28.058911365', 'rain': '0.0', 'rainRate': '0.0', 'usUnits': '1', 'windchill': '68.0', 'windDir': 'None', 'windGust': '0.0', 'windGustDir': 'None', 'windrun': '0.0', 'windSpeed': '0.0' LOOP: 2025-08-24 08:51:41 EDT (1756039901) 'altimeter': '30.029532326429237', 'appTemp': '72.82860931324616', 'barometer': '29.98054422916703', 'cloudbase': '2930.511265697056', 'dateTime': '1756039901', 'dewpoint': '63.49175043093296', 'ET': 'None', 'heatindex': '68.69300000000001', 'humidex': '78.34213268284668', 'inDewpoint': '54.71694388930514', 'inHumidity': '61', 'inTemp': '68.72', 'inTempBatteryStatus': '0', 'maxSolarRad': '322.44979536500733', 'outHumidity': '85', 'outTemp': '68.18', 'outTempBatteryStatus': '0', 'pressure': '28.058911365', 'rain': 'None', 'rainBatteryStatus': '0', 'rainRate': '0.0', 'rxCheckPercent': '100', 'usUnits': '1', 'windBatteryStatus': '0', 'windchill': '68.18', 'windDir': 'None', 'windGust': '0.0', 'windGustDir': 'None', 'windrun': 'None', 'windSpeed': '0.0'
On Saturday, August 23, 2025 at 7:11:17 PM UTC-4 [email protected] wrote: > Unfortunately your LaCrosse model has been "retired" and from looking at a > number of posts at wxforum.net it appears that your absolute pressure > value is not user adjustable. Therefore, we can try using WeeWX to > modify/re-calibrate your absolute pressure/pressure. > > Restore the station altitude back to 1865 ft Try putting in a calibration > offset of -1.79 inHg. in your weewx.conf file (see below). Restart WeeWX > then run another LOOP to obtain the three pressures; "pressure", > "altimeter" and "barometer" to see iif barometer and altimeter seem to be > more accurate. When you are comparing pressure values from your weather > station to an airport you must ensure tht both you and the airport you > are comparing with is in the same pressure system, i.e, the same high > pressure or low pressure system, KPSK is considered to be a close-by > airport 15 miles/25 km so chances are you should be in the same pressure > system. Any other airport farther away gets a bit trickier. > > If you wish to read a bit more about barometer set-up, configuration and > troubleshooting, check out the barometer wiki at > www.barometer-wiki.ca/barometer. > > Good luck! > > [StdCalibrate] > [[Corrections]] > pressure = pressure - 1.79 > > On Friday, August 22, 2025 at 9:18:07 AM UTC-4 kufuu wrote: > >> Thanks >> >> On Friday, August 22, 2025 at 8:22:25 AM UTC-4 [email protected] wrote: >> >>> EDIT: Sorry. I meant to say station pressure calculator not station >>> elevation calculator >>> You can use this station pressure calculator: >>> https://www.sensorsone.com/elevation-station-qfe-sea-level-qnh-pressure-calculator/?ab=1&v0=1865&f0=ft&f1=inHg0C&f2=inHg0C >>> >>> Note: This calculator uses aviation terms. QFE = station pressure and >>> QNH = altimeter setting. I've already entered in your elevation. All you >>> have to do is enter in the altimeter setting of your airport in the QNH >>> input field and the calculator will calculate your QFE (station pressure). >>> --- >>> >>> On Thursday, August 21, 2025 at 2:49:01 PM UTC-4 [email protected] >>> wrote: >>> >>>> Given: >>>> >>>> Aug 20 6:35 pm >>>> >>>> Altitude (true) = 1865 ft >>>> WeeWX altitude = 70 ft >>>> WeeWX altimeter= 29.86 inHg (rounded)) >>>> WeeWX barometer = 29.85 inHg (rounded) >>>> WeeWX pressure = 29.78 inHg (rounded) >>>> >>>> NOTE: at altitude = 70 ft we are very close to sea level (altitude = >>>> 0). As mentioned in my previous post, all three pressures hypothetically, >>>> should be the same at sea level. We can see that clearly happening at the >>>> 70 ft altitude where the readings start getting closer together. >>>> >>>> Aug 20 18:35 (from mesowest): >>>> >>>> KPSK elevation = 2106 ft >>>> KPSK pressure = 27.74 >>>> KPSK altimeter = 29.95 >>>> >>>> EXAMPLE station elevation calculation: >>>> >>>> LaCrosse true altitude = 1865 ft >>>> KPSK altimeter= 29.95 inHg >>>> >>>> Solving for LaCrosse "pressure" = 27.99 inHg >>>> >>>> As reported LaCrosse "pressure" = 29.78 inHg >>>> >>>> It looks like your current pressure of 29.78 is much too high. >>>> >>>> In order to calculate altimeter, at a location with a 1865 ft altitude, >>>> your relative pressure on your console should always be reading 1.96 Hg >>>> higher than your current live absolute pressure ("pressure"). >>>> >>>> To re-calibrate your display console: >>>> >>>> 1. Calculate your station pressure (follow the example above) and then >>>> add 1.96 to this number to get your corrected relative pressure. Modify >>>> the >>>> existing relative pressure in your display console. >>>> 2. Your pressure is wrong and you will have to fix it. I was unable to >>>> find a way to modify your absolute pressure from your manual. You may have >>>> to contact LaCrosse and see how this may be done. >>>> 3. Alternatively, I believe there is a way to add a pressure >>>> calibration offset in the WeeWX config file. >>>> 4. Once you fixed your absolute pressure and relative pressure,, >>>> don'forget to put back your correct station altitude of 1865 ft. >>>> --- >>>> >>>> On Wednesday, August 20, 2025 at 7:11:02 PM UTC+4 kufuu wrote: >>>> >>>>> Correction , I have weewx set at 70ft elevation to try and match >>>>> another weather station, sorry about that. >>>>> >>>>> >>>>> On Wednesday, August 20, 2025 at 6:50:00 PM UTC-4 kufuu wrote: >>>>> >>>>>> Im about 15 miles away >>>>>> >>>>>> On Wednesday, August 20, 2025 at 6:47:42 PM UTC-4 kufuu wrote: >>>>>> >>>>>>> My actual elevation is 1865ft , weewx is set to 0 >>>>>>> >>>>>>> Using configuration file /etc/weewx/weewx.conf >>>>>>> REC: 2025-08-20 18:35:00 EDT (1755729300) 'altimeter': >>>>>>> '29.856197863702114', 'appTemp': '84.16620032955495', 'barometer': >>>>>>> '29.850973617639387', 'cloudbase': '1750.7310847902036', 'dateTime': >>>>>>> '1755729300', 'dewpoint': '69.42478322692313', 'ET': 'None', >>>>>>> 'heatindex': >>>>>>> '77.86800000000002', 'humidex': '91.66911741879971', 'inDewpoint': >>>>>>> '56.232061622715676', 'inHumidity': '56', 'inTemp': >>>>>>> '72.86000000000001', >>>>>>> 'interval': '5', 'maxSolarRad': '192.36417227192797', 'outHumidity': >>>>>>> '78', >>>>>>> 'outTemp': '76.82000000000002', 'pressure': '29.778039395', 'rain': >>>>>>> '0.0', >>>>>>> 'rainRate': '0.0', 'usUnits': '1', 'windchill': '76.82000000000002', >>>>>>> 'windDir': 'None', 'windGust': '0.0', 'windGustDir': 'None', 'windrun': >>>>>>> '0.0', 'windSpeed': '0.0' >>>>>>> >>>>>>> LOOP: 2025-08-20 18:35:44 EDT (1755729344) 'altimeter': >>>>>>> '29.856197863702114', 'appTemp': '84.16620032955495', 'barometer': >>>>>>> '29.850973617639387', 'cloudbase': '1750.7310847902036', 'dateTime': >>>>>>> '1755729344', 'dewpoint': '69.42478322692313', 'ET': 'None', >>>>>>> 'heatindex': >>>>>>> '77.86800000000002', 'humidex': '91.66911741879971', 'inDewpoint': >>>>>>> '56.232061622715676', 'inHumidity': '56', 'inTemp': >>>>>>> '72.86000000000001', >>>>>>> 'inTempBatteryStatus': '0', 'maxSolarRad': '189.6877965534115', >>>>>>> 'outHumidity': '78', 'outTemp': '76.82000000000002', >>>>>>> 'outTempBatteryStatus': '0', 'pressure': '29.778039395', 'rain': >>>>>>> 'None', >>>>>>> 'rainBatteryStatus': '0', 'rainRate': '0.0', 'rxCheckPercent': '100', >>>>>>> 'usUnits': '1', 'windBatteryStatus': '0', 'windchill': >>>>>>> '76.82000000000002', >>>>>>> 'windDir': 'None', 'windGust': '0.0', 'windGustDir': 'None', 'windrun': >>>>>>> 'None', 'windSpeed': '0.0' >>>>>>> >>>>>>> KPSK dublin VA >>>>>>> >>>>>>> >>>>>>> *Current conditions at* Dublin / New River Valley (KPSK) *Lat: * >>>>>>> 37.13°N*Lon: *80.68°W*Elev: *2106ft. >>>>>>> >>>>>>> Mostly Cloudy >>>>>>> >>>>>>> 76°F >>>>>>> >>>>>>> 24°C >>>>>>> >>>>>>> *Humidity* >>>>>>> 76% >>>>>>> *Wind Speed* >>>>>>> E 7 mph >>>>>>> *Barometer* >>>>>>> 29.95 in >>>>>>> *Dewpoint* >>>>>>> 68°F (20°C) >>>>>>> *Visibility* >>>>>>> 10.00 mi >>>>>>> *Heat Index* >>>>>>> 77°F (25°C) >>>>>>> *Last update* >>>>>>> 20 Aug 6:35 pm EDT >>>>>>> >>>>>>> *More Information:* >>>>>>> >>>>>>> Local Forecast Office <https://www.weather.gov/rnk>More Local Wx >>>>>>> <http://forecast.weather.gov/obslocal.php?warnzone=VAZ013&local_place=2%20Miles%20N%20Dublin%20VA&zoneid=EDT&offset=14400>3 >>>>>>> >>>>>>> Day History >>>>>>> <http://forecast.weather.gov/data/obhistory/KPSK.html>Hourly >>>>>>> Weather Forecast >>>>>>> <https://forecast.weather.gov/MapClick.php?lat=37.1333&lon=-80.6833&unit=0&lg=english&FcstType=graphical> >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wednesday, August 20, 2025 at 6:00:53 PM UTC-4 [email protected] >>>>>>> wrote: >>>>>>> >>>>>>>> The three pressures on your LOOP was "altimeter", "barometer" and >>>>>>>> "pressure". >>>>>>>> If you set station altitude = 0 then you are telling your weather >>>>>>>> station's barometer that it is located at sea level. >>>>>>>> Therefore all three pressures shouldl read the same. >>>>>>>> >>>>>>>> "pressure" is just your local atmospheric pressure at your >>>>>>>> location's altitude.. >>>>>>>> "altimeter" is a sea level pressure that factors in your altitude >>>>>>>> above sea level and "corrects" your local pressure (station pressure) >>>>>>>> and >>>>>>>> calculates an equivalent pressure at sea level. >>>>>>>> "barometer" is also a sea level pressure except it factors in your >>>>>>>> station pressure "(pressure" in WeeWX) , local temperature and >>>>>>>> humidity >>>>>>>> and "corrects" it to an equivalent pressure at sea level. >>>>>>>> >>>>>>>> I took a quick look at your weather station's manual and it appears >>>>>>>> that your display console reads "relative pressure" only. So in your >>>>>>>> case >>>>>>>> if you set station altitude = 0 in WeeWX, WeeWX's SLP correction will >>>>>>>> calculate a correction = 0. It makes sense because you told WeeWX you >>>>>>>> are >>>>>>>> located at sea level so there is no need to correct your "pressure" to >>>>>>>> sea >>>>>>>> level - you are already at sea level! Therefore "pressure" = >>>>>>>> "barometer" at >>>>>>>> sea level ( altitude = 0). >>>>>>>> >>>>>>>> I am not familiar with LaCrosse barometer operations- but I'll try >>>>>>>> to help. Other LaCrosse owners can certainly jump in... >>>>>>>> >>>>>>>> Things to check. >>>>>>>> >>>>>>>> 1. What have you entered as your station altitude in WeeWX? Did you >>>>>>>> ensure that the station altitude you entered in WeeWX is the altitude >>>>>>>> of >>>>>>>> the barometric sensor (total height above sea level?) How did you >>>>>>>> calculate >>>>>>>> your station altitude? >>>>>>>> >>>>>>>> 2. Your weather station manual makes no mention of sea level >>>>>>>> pressure calculations, entering an altitude or elevation in your >>>>>>>> display >>>>>>>> console.or using an offset. The manual implies that the console only >>>>>>>> displays relative pressure? Can you confirm that? >>>>>>>> >>>>>>>> 3. How close are you to an official weather station at an airport? >>>>>>>> Can you provide the ICAO code for it? Or the name of the airport? >>>>>>>> >>>>>>>> 4. Your July 31 LOOP altimeter and barometer readings appear to be >>>>>>>> unseasonably high for typical summertime weather. >>>>>>>> >>>>>>>> 5. WeeWX is calculating altimeter correctly but WeeWX barometer >>>>>>>> seems high compared to the Starpath online SLP calculator using the >>>>>>>> same >>>>>>>> input parameters. WeeWX "barometer" should be close to be the same or >>>>>>>> less >>>>>>>> than "altimeter" at the temperatures you reported. >>>>>>>> >>>>>>>> 6. Does your weather station use PC software from the manufacturer? >>>>>>>> If so, what is it reporting currently for absolute pressure and >>>>>>>> relative >>>>>>>> pressure? Can you adjust your absolute pressure? >>>>>>>> >>>>>>>> 7. Can you do another LOOP and give us the three pressures >>>>>>>> (altimeter, barometer, and pressure)? >>>>>>>> >>>>>>>> At the same time you do a LOOP ,can you obtain the altimeter >>>>>>>> setting of a close-by airport. And finally, can you obtain the >>>>>>>> elevation of >>>>>>>> that airport. >>>>>>>> >>>>>>>> Summing up, we need: your station altitude, your weather station's >>>>>>>> absolute pressure, relative pressure and the current WeeWX LOOP >>>>>>>> pressure >>>>>>>> values (altimeter, barometer, and pressure) and the LOOP outside >>>>>>>> temperature. In order to make some pressure comparisons and accuracy >>>>>>>> checks. We would also need , the name(s) of any close-by airport(s) >>>>>>>> and how >>>>>>>> close you are to these airports. lus we need the airport altimeter >>>>>>>> setting >>>>>>>> reading and elevation. As Tom mentioned in the wiki, you have to be >>>>>>>> careful >>>>>>>> about comparing your relative pressure on your display console with >>>>>>>> the >>>>>>>> WeeWX "barometer" calculation. They could be two different things. >>>>>>>> >>>>>>>> Michael's advice is I think, correct. You probably need to >>>>>>>> re-calibrate or at least verify if your station pressure/absolute >>>>>>>> value is >>>>>>>> accurate. >>>>>>>> >>>>>>>> On Wednesday, August 20, 2025 at 1:33:38 AM UTC+4 >>>>>>>> [email protected] wrote: >>>>>>>> >>>>>>>>> >>>>>>>>> Which obs_type "reads what is on the display", when altitude is >>>>>>>>> set to 0? pressure, altimeter or barometer or all three? (It should >>>>>>>>> be all >>>>>>>>> three) When setting your altitude, pressure should always "read what >>>>>>>>> is on >>>>>>>>> the display", altimeter and barometer will change with the altitude >>>>>>>>> you >>>>>>>>> configure. >>>>>>>>> >>>>>>>>> You should calibrate your station to the real pressure provided by >>>>>>>>> a reliable station near you, which is located at the same altitude. >>>>>>>>> Then >>>>>>>>> configure the altitude of the station in weewx, then choose the >>>>>>>>> obs_types >>>>>>>>> you want to have displayed in your report. Depending on what you >>>>>>>>> choose, >>>>>>>>> the may or may not "read what is on the display", which is perfectly >>>>>>>>> fine >>>>>>>>> for altimeter and barometer. >>>>>>>>> kufuu schrieb am Dienstag, 19. August 2025 um 21:09:21 UTC+2: >>>>>>>>> >>>>>>>>>> If I put 0 altitude in weewx config then it reads what is on the >>>>>>>>>> display, is there any way to correct or just leave it 0 ? >>>>>>>>>> >>>>>>>>>> On Thursday, July 31, 2025 at 9:29:40 AM UTC-4 kufuu wrote: >>>>>>>>>> >>>>>>>>>>> It can wait till then and good luck, >>>>>>>>>>> >>>>>>>>>>> On Thursday, July 31, 2025 at 9:06:30 AM UTC-4 kufuu wrote: >>>>>>>>>>> >>>>>>>>>>>> Let me redo this and put the dates in order, >>>>>>>>>>>> LOOP: 2025-07-31 08:45:20 EDT (1753965920) 'altimeter': >>>>>>>>>>>> '31.994965595814566', 'appTemp': '82.83203424777768', 'barometer': >>>>>>>>>>>> '31.942483641883886', 'cloudbase': '2805.6732703464695', >>>>>>>>>>>> 'dateTime': >>>>>>>>>>>> '1753965920', 'dewpoint': '70.70103761047554', 'ET': 'None', >>>>>>>>>>>> 'heatindex': >>>>>>>>>>>> '76.113', 'humidex': '90.81599237942409', 'inDewpoint': >>>>>>>>>>>> '55.52280883736111', 'inHumidity': '58', 'inTemp': '71.06', >>>>>>>>>>>> 'inTempBatteryStatus': '0', 'maxSolarRad': '357.687499228319', >>>>>>>>>>>> 'outHumidity': '87', 'outTemp': '74.84', 'outTempBatteryStatus': >>>>>>>>>>>> '0', >>>>>>>>>>>> 'pressure': '29.919783335', 'rain': '0.0', 'rainBatteryStatus': >>>>>>>>>>>> '0', >>>>>>>>>>>> 'rainRate': '0.0', 'rxCheckPercent': '100', 'usUnits': '1', >>>>>>>>>>>> 'windBatteryStatus': '0', 'windchill': '74.84', 'windDir': 'None', >>>>>>>>>>>> 'windGust': '0.0', 'windGustDir': 'None', 'windrun': 'None', >>>>>>>>>>>> 'windSpeed': >>>>>>>>>>>> '0.0' >>>>>>>>>>>> REC: 2025-07-31 08:45:00 EDT (1753965900) 'altimeter': >>>>>>>>>>>> '31.994965595814566', 'appTemp': '82.83203424777768', 'barometer': >>>>>>>>>>>> '31.942483641883886', 'cloudbase': '2805.6732703464695', >>>>>>>>>>>> 'dateTime': >>>>>>>>>>>> '1753965900', 'dewpoint': '70.70103761047554', 'ET': 'None', >>>>>>>>>>>> 'heatindex': >>>>>>>>>>>> '76.113', 'humidex': '90.81599237942409', 'inDewpoint': >>>>>>>>>>>> '55.52280883736111', 'inHumidity': '58.0', 'inTemp': '71.06', >>>>>>>>>>>> 'inTempBatteryStatus': '0.0', 'interval': '5.0', 'maxSolarRad': >>>>>>>>>>>> '351.7781598061274', 'outHumidity': '87.0', 'outTemp': '74.84', >>>>>>>>>>>> 'outTempBatteryStatus': '0.0', 'pressure': '29.919783335', 'rain': >>>>>>>>>>>> '0.0', >>>>>>>>>>>> 'rainBatteryStatus': '0.0', 'rainRate': '0.0', 'rxCheckPercent': >>>>>>>>>>>> '97.5', >>>>>>>>>>>> 'usUnits': '1', 'windBatteryStatus': '0.0', 'windchill': '74.84', >>>>>>>>>>>> 'windDir': 'None', 'windGust': '0.0', 'windGustDir': 'None', >>>>>>>>>>>> 'windrun': >>>>>>>>>>>> '0.0', 'windSpeed': '0.0' >>>>>>>>>>>> Traceback (most recent call last): >>>>>>>>>>>> File "/usr/share/weewx/weewx/reportengine.py", line 248, in >>>>>>>>>>>> run >>>>>>>>>>>> obj.start() >>>>>>>>>>>> File "/usr/share/weewx/weewx/reportengine.py", line 465, in >>>>>>>>>>>> start >>>>>>>>>>>> self.run() >>>>>>>>>>>> File "/usr/share/weewx/weewx/reportengine.py", line 621, in >>>>>>>>>>>> run >>>>>>>>>>>> ncopy += weeutil.weeutil.deep_copy_path(path, html_dest_dir) >>>>>>>>>>>> File "/usr/share/weewx/weeutil/weeutil.py", line 1811, in >>>>>>>>>>>> deep_copy_path >>>>>>>>>>>> shutil.copy(path, d) >>>>>>>>>>>> File "/usr/lib/python3.9/shutil.py", line 418, in copy >>>>>>>>>>>> copyfile(src, dst, follow_symlinks=follow_symlinks) >>>>>>>>>>>> File "/usr/lib/python3.9/shutil.py", line 264, in copyfile >>>>>>>>>>>> with open(src, 'rb') as fsrc, open(dst, 'wb') as fdst: >>>>>>>>>>>> PermissionError: [Errno 13] Permission denied: >>>>>>>>>>>> '/var/www/html/weewx/seasons.css' >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -- You received this message because you are subscribed to the Google Groups "weewx-user" group. 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