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6 minutes ago, psv88 said:

@BucksCO_PA

take a look at the current area temps. All local sites are 90 or above, even on LI. 
 

Central Park is 87, by far the coolest. 
 

do you think that A. The city is a naturally much colder area than the suburbs, or B the sensor is reading too low?

average high temp this month at Central Park - 86.2 degrees, average high this month at LGA - 86.2 degrees

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3 minutes ago, doncat said:

Problem with alot of the pws with the sun shining on the shield....aspirated is the way to go but they are expensive. 

I have a Davis Vantage Vue that reads high too when in full sun. Non aspirated, and well over 10 years old, so that may be part of the issue, but has read high for as long as I remember. 

But regarding aspiration, not a single temp/rh sensor (66 in total) operated by the NJWxNet is aspirated, but they don't have that problem. Aspiration is good, but not essential; perhaps has more to do with sensor design or just a biased sensor. 

image.thumb.png.f4ad914c90d7f2be1a9c154d3106a929.png

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13 minutes ago, mgerb said:

I have a Davis Vantage Vue that reads high too when in full sun. Non aspirated, and well over 10 years old, so that may be part of the issue, but has read high for as long as I remember. 

But regarding aspiration, not a single temp/rh sensor (66 in total) operated by the NJWxNet is aspirated, but they don't have that problem. Aspiration is good, but not essential; perhaps has more to do with sensor design or just a biased sensor. 

image.thumb.png.f4ad914c90d7f2be1a9c154d3106a929.png

What type of equipment do they use at those njwxnet stations if you're familiar?  I assume it's just observers with their own pws.

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44 minutes ago, WestBabylonWeather said:

Of course I get the bad ambient. I need to figure out how to calibrate it


.

Do they sell thermometers that can be calibrated?  I know where I work we compare a thermometer for regulatory purposes, we compare the readings to a NIST thermometer and deduct or add the difference.

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2 hours ago, uofmiami said:

It'd be great if we had real time to compare but it'll never happen unfortunately.  Have to go on former location data to current location data.

We can use the 90°day data from 1970 to 1983 when the Central Park thermometer wasn’t under the trees.The comparison is to the much warmer present era from 2010-2023 with tree growth impeding accurate observations. There is no reason other than tree growth for NYC to have the number of 90° days reamain at 19 with how much the climate has warmed since then. Both LGA and EWR show a significant increase in 90° days as the climate has warmed. The Hudson Valley shows the same trend as LGA and EWR. POU has nearly doubled its number of 90° days. Again, there is no reason for POU to have more 90° days now than NYC. So using a proportional 90° day increase similar to  EWR, they would most likely have an around 30 days a year reaching 90° instead of 19 if the site was properly maintained. This would mean the Great Lawn probably sees that # of 90° days since it isn’t in the shade. But an increase similar to LGA and POU would place that number even higher.

 


 

Monthly Number of Days Max Temperature >= 90 for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 2 8 6 2 0 19
1983 0 0 6 14 9 7 0 36
1982 0 0 0 11 0 0 0 11
1981 0 0 2 10 4 0 0 16
1980 0 2 1 11 15 3 0 32
1979 0 2 0 7 8 1 0 18
1978 0 1 2 3 5 0 0 11
1977 1 2 0 11 7 2 0 23
1976 3 0 6 2 4 0 0 15
1975 0 1 1 2 4 0 0 8
1974 0 1 1 10 5 0 0 17
1973 0 0 4 4 6 4 0 18
1972 0 0 0 11 3 1 0 15
1971 0 0 5 6 5 2 0 18
1970 0 2 1 4 8 7 0 22


 

Monthly Number of Days Max Temperature >= 90 for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 3 9 5 2 0 19
2023 2 0 1 5 0 2 M 10
2022 0 2 1 10 11 1 0 25
2021 0 0 8 4 5 0 0 17
2020 0 0 2 14 4 0 0 20
2019 0 0 1 10 3 0 1 15
2018 0 2 3 6 7 3 0 21
2017 0 3 3 5 1 1 0 13
2016 0 2 0 10 7 3 0 22
2015 0 0 1 5 8 6 0 20
2014 0 0 0 3 3 2 0 8
2013 0 2 3 10 1 1 0 17
2012 0 0 5 10 3 1 0 19
2011 0 0 3 14 3 0 0 20
2010 1 1 4 16 12 3 0 37


 

Monthly Number of Days Max Temperature >= 90 for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 2 6 4 2 0 14
1983 0 0 5 11 8 7 0 31
1982 0 0 0 6 0 0 0 6
1981 0 0 2 11 2 0 0 15
1980 0 0 3 8 9 2 0 22
1979 0 2 0 7 7 0 0 16
1978 0 0 0 3 1 0 0 4
1977 0 1 0 9 3 1 0 14
1976 1 0 5 1 3 0 0 10
1975 0 1 1 2 3 0 0 7
1974 0 1 1 9 2 0 0 13
1973 0 0 3 3 7 4 0 17
1972 0 0 0 3 0 1 0 4
1971 0 0 3 3 2 1 0 9
1970 0 2 1 5 9 5 0 22


 

Monthly Number of Days Max Temperature >= 90 for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 4 12 7 2 0 26
2023 0 0 1 10 0 3 M 14
2022 0 3 3 11 13 0 0 30
2021 0 0 9 8 8 0 0 25
2020 0 0 5 19 10 0 0 34
2019 0 0 4 14 5 2 1 26
2018 0 4 4 10 16 4 0 38
2017 0 3 3 8 2 1 0 17
2016 0 3 1 15 10 3 0 32
2015 0 0 3 6 8 3 0 20
2014 0 0 0 3 1 2 0 6
2013 0 2 2 15 1 1 0 21
2012 0 2 6 14 6 0 0 28
2011 0 0 3 14 2 0 0 19
2010 1 2 12 18 11 4 0 48


 

Monthly Number of Days Max Temperature >= 90 for NEWARK LIBERTY INTL AP, NJ
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 3 9 6 2 0 22
1983 0 0 7 15 11 7 0 40
1982 0 0 1 10 1 0 0 12
1981 0 1 4 12 3 1 0 21
1980 0 1 3 8 12 3 0 27
1979 0 2 1 8 9 0 0 20
1978 0 1 3 8 4 0 0 16
1977 1 3 1 14 6 1 0 26
1976 2 0 7 2 4 0 0 15
1975 0 1 3 3 5 0 0 12
1974 1 2 2 10 3 0 0 18
1973 0 0 5 9 12 5 0 31
1972 0 0 0 16 4 1 0 21
1971 0 0 6 7 7 2 0 22
1970 0 2 2 5 8 5 0 22


 

Monthly Number of Days Max Temperature >= 90 for NEWARK LIBERTY INTL AP, NJ
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 2 5 15 8 3 0 33
2023 2 1 1 14 5 4 M 27
2022 0 4 6 20 18 1 0 49
2021 0 4 12 11 13 1 0 41
2020 0 0 5 17 9 0 0 31
2019 0 1 4 14 4 3 1 27
2018 0 4 5 9 14 4 0 36
2017 0 3 5 9 2 3 0 22
2016 0 3 3 16 13 5 0 40
2015 0 2 4 11 13 5 0 35
2014 0 0 2 8 2 3 0 15
2013 0 2 4 15 3 1 0 25
2012 0 2 6 16 7 2 0 33
2011 0 1 4 22 4 0 0 31
2010 1 2 13 21 11 6 0 54


 

Monthly Number of Days Max Temperature >= 90 for Poughkeepsie Area, NY (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 1 6 3 1 0 12
1983 0 0 4 11 7 6 0 28
1982 0 0 0 10 0 0 0 10
1981 0 1 1 5 1 0 0 8
1980 0 0 3 6 6 3 0 18
1979 0 2 0 4 5 0 0 11
1978 0 0 1 4 3 0 0 8
1977 0 2 0 12 3 1 0 18
1976 3 0 1 0 0 0 0 4
1975 0 3 3 2 3 0 0 11
1974 0 0 1 5 0 0 0 6
1973 0 0 3 4 8 4 0 19
1972 0 0 0 10 2 0 0 12
1971 0 0 2 3 1 1 0 7
1970 0 0 0 5 7 1 0 13


 

Monthly Number of Days Max Temperature >= 90 for Poughkeepsie Area, NY (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
Year
Apr
May
Jun
Jul
Aug
Sep
Oct
Season
Mean 0 1 3 10 5 2 0 21
2023 2 0 2 7 0 1 M 12
2022 0 3 1 13 16 1 0 34
2021 0 1 9 4 6 0 0 20
2020 0 0 4 17 10 0 0 31
2019 0 0 1 12 2 1 0 16
2018 0 1 3 8 4 4 0 20
2017 0 2 4 3 1 2 0 12
2016 0 4 3 16 6 2 0 31
2015 0 0 0 5 10 6 0 21
2014 0 0 1 4 1 2 0 8
2013 0 3 4 11 0 1 0 19
2012 1 2 5 11 3 0 0 22
2011 0 0 3 10 2 0 0 15
2010 1 2 4 16 5 2 0 30
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12 minutes ago, Dark Star said:

Do they sell thermometers that can be calibrated?  I know where I work we compare a thermometer for regulatory purposes, we compare the readings to a NIST thermometer and deduct or add the difference.

Davis sells NIST equipment.  Not sure if Ambient does.

https://www.davisinstruments.com/pages/nist-traceable-sensors

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38 minutes ago, doncat said:

What type of equipment do they use at those njwxnet stations if you're familiar?  I assume it's just observers with their own pws.

Yup, I'm familiar. I work in the state climate office and sometimes help service the stations. It's mostly a mix of Campbell Scientific EE181 and HC2S3 (more of the former). Then there are 14 stations that use Peet Bros equipment, which is more akin to backyard-type weather stations. With one exception (Harrison) and aside from the Peet Bros stations, we don't pull in any PWS data. We also bring in other professional networks, such as ASOS, AWOS, RAWS, some USGS, and a few others. 

If you go to any station page (e.g., Little Falls here), near the bottom of the page you can see photos of the site and a list of installed equipment. 

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