*Current conditions at* Dublin / New River Valley (KPSK) *Lat: *37.13°N *Lon: *80.68°W*Elev: *2106ft.
Overcast 67°F 19°C *Humidity* 88% *Wind Speed* SW 3 mph *Barometer* 30.02 in *Dewpoint* 64°F (18°C) *Visibility* 10.00 mi *Last update* 24 Aug 8:35 am EDT On Sunday, August 24, 2025 at 8:56:35 AM UTC-4 kufuu wrote: > 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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