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Summer Minimum Temperatures & Dew Points; A Brave New World Since The 1990s.


PRINCETON ANGLER
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Been following this site for years. Don’t think I’ve ever posted. First, thanks to whomever created this site. Big step up from American. Also, thanks to all who have posted here in expanding my weather knowledge and awareness.

In regards to the  “wet rag” discussion... my wife was recently saying that the humidity in New Jersey has gotten to the point where she might actually consider a move if it continues. While I know we’ve had warming climate, and that nights have been substantially warmer, is there an easy way to find what dew points have done over the last 30 years?

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1 hour ago, Rainshadow said:

I think the worst part of the way summers are evolving is more about the mins than the maxes here.  That CWSU site all water temps are well into the 70s which was pretty much unheard of this time of year 10, 20 years ago.  Without some steady offshore wind, we just become a wet rag. 

77 degree ocean water temp for June is crazy, has to close if not a record for the month. We had that strong NW wind Sunday & the water temps did drop into the low 60's however that only lasted a day & they're back up close to 74 degrees today. A wind like that back in day would had the water temps in the 50's for a few days this time of year.

292151159_acoceanjune.png.8c6703f62461dac64f1c86bb5d7c0991.png

 

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1 hour ago, PRINCETON ANGLER said:

Been following this site for years. Don’t think I’ve ever posted. First, thanks to whomever created this site. Big step up from American. Also, thanks to all who have posted here in expanding my weather knowledge and awareness.

In regards to the  “wet rag” discussion... my wife was recently saying that the humidity in New Jersey has gotten to the point where she might actually consider a move if it continues. While I know we’ve had warming climate, and that nights have been substantially warmer, is there an easy way to find what dew points have done over the last 30 years?

Princeton,

I don't know of a site that can easily show dew points other than parsing thru LCD(s).  So what this table is showing (for PHL, TTN data is missing for parts of this time) are the number of days in which the minimum temperature was 65 degrees or higher.  It is not perfect, but it could somehow be used as a proxy for the dew point.  If the dew point remains high(er) minimum temperatures stay high(er).  This is from 1980-2019 (top part is cut off).  But most of the since 1980 records have occurred recently and the around summer months (September in particular) are showing the bigger hits. 

1.JPG.0f92ff68b8e9a94fd60c3dd33e707e86.JPG

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3 minutes ago, Rainshadow said:

Princeton,

I don't know of a site that can easily show dew points other than parsing thru LCD(s).  So what this table is showing (for PHL, TTN data is missing for parts of this time) are the number of days in which the minimum temperature was 65 degrees or higher.  It is not perfect, but it could somehow be used as a proxy for the dew point.  If the dew point remains high(er) minimum temperatures stay high(er).  This is from 1980-2019 (top part is cut off).  But most of the since 1980 records have occurred recently and the around summer months (September in particular) are showing the bigger hits. 

1.JPG.0f92ff68b8e9a94fd60c3dd33e707e86.JPG

Before someone says, come on Tony, you are picking an urban spot and urbanization only goes in one direction, the below table is for Atlantic City International Airport, less affected by urban sprawl and one could say more affected by ocean temps given their proximity.  This is for number of days minimum temperatures 60 or greater for their entire POR which started in 1943.  There have been only two years this century that have averaged below the POR mean.

2.JPG.235116e6ce5a5266eb1ae258b1cdc289.JPG

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3 hours ago, Rainshadow said:

Before someone says, come on Tony, you are picking an urban spot and urbanization only goes in one direction, the below table is for Atlantic City International Airport, less affected by urban sprawl and one could say more affected by ocean temps given their proximity.  This is for number of days minimum temperatures 60 or greater for their entire POR which started in 1943.  There have been only two years this century that have averaged below the POR mean.

2.JPG.235116e6ce5a5266eb1ae258b1cdc289.JPG

Can you please plot it for east nantmeal

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8 hours ago, PRINCETON ANGLER said:

Been following this site for years. Don’t think I’ve ever posted. First, thanks to whomever created this site. Big step up from American. Also, thanks to all who have posted here in expanding my weather knowledge and awareness.

In regards to the  “wet rag” discussion... my wife was recently saying that the humidity in New Jersey has gotten to the point where she might actually consider a move if it continues. While I know we’ve had warming climate, and that nights have been substantially warmer, is there an easy way to find what dew points have done over the last 30 years?

Welcome  & great question, last summer I was also wondering about DP levels the past 30 yrs. however I was on the opposite side of the fence believing that they were higher during the summer months during the 1990's than they have been this decade. For the most part I recall the big 2010, "11 & "12 heaters being accompanied by modest DP's, unfortunately for someone that worked outdoor construction at that time the same can't be said for the 1993, "94 & "95 summer torches. 

I dug into the Weather Underground daily data for PHL & they do provide a monthly DP average. Not sure if the #'s are perfect but they certainly seem to correspond with known months & overall summers that had high DP's.

Average summer DP during the 1990's - 63.7

Average summer DP during the 2000's - 63.0

Average summer DP during the 2010's - 62.8

The 1990's are represented very well with the top 2 of 3 overall highest DP's for the climo summer and the top 2 DP's for the months of June & July.

149954884_PHLDP.png.f5aebbfdcae2ca5466aa429ff9baa7ea.png

 

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5 hours ago, Rainshadow said:

blog-antarctica-lifecycle-of-an-iceberg-banner.jpg.b155f47d49df14ad6d9ce9288a71edc1.jpg

Dunno, a lot of mornings > 65 in my part of E. Nantmeal.     Icebergs melted months ago.   Got a lovely 74 DP right now.

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22 hours ago, tombo82685 said:

Can you please plot it for east nantmeal

Below are June-August lows since 1895 for coastal NJ, the state of NJ and SE PA piedmont. Nights are getting warmer region-wide, with coastal NJ leading the way.

 

njsummerlows.png

njstatesummerlows.png

sepasummerlows.png

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22 minutes ago, Chubbs said:

Below are June-August lows since 1895 for coastal NJ, the state of NJ and SE PA piedmont. Nights are getting warmer region-wide, with coastal NJ leading the way.

 

njsummerlows.png

njstatesummerlows.png

sepasummerlows.png

1940-1990 was fairly steady and ever since then the trend (even the trof seasons are higher) stinks.

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On 7/5/2019 at 4:15 PM, Chubbs said:

Below are June-August lows since 1895 for coastal NJ, the state of NJ and SE PA piedmont. Nights are getting warmer region-wide, with coastal NJ leading the way.

 

njsummerlows.png

njstatesummerlows.png

sepasummerlows.png

I was reflecting on this and 75F seems awful warm for the average summer low. Sure enough above are mean temps not the lows. Will correct later today.

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On 7/4/2019 at 12:31 PM, PRINCETON ANGLER said:

Been following this site for years. Don’t think I’ve ever posted. First, thanks to whomever created this site. Big step up from American. Also, thanks to all who have posted here in expanding my weather knowledge and awareness.

In regards to the  “wet rag” discussion... my wife was recently saying that the humidity in New Jersey has gotten to the point where she might actually consider a move if it continues. While I know we’ve had warming climate, and that nights have been substantially warmer, is there an easy way to find what dew points have done over the last 30 years?

I just made a new thread and started with your post, just in case you are wondering how did that happen.  First post, first thread start, congrats! :clap:

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Rutgers site has monthly climate tables for all NJ counties. Period of record goes back to 1895. To follow-up on Charlie's NJ Coastal plot listed below are average min temps for the counties of Atlantic, Cape May, Monmouth & Ocean. Dark red are the record high monthly mins & the lighter shade of red are to the top 5 highest monthly mins. 

https://climate.rutgers.edu/stateclim_v1/nclimdiv/index.php?stn=NJ001&elem=mint

Since 2000 these record high mins have been recorded:

Atlantic County - 10 of the 12 highest monthly mins & 36 of the 60 top 5 highest monthly mins

Cape May County - 7 of the 12 highest monthly mins & 35 of the 60 top 5 highest monthly mins

Monmouth County - 10 of the 12 highest monthly mins & 39 of the 60 top 5 highest monthly mins

Ocean County - 10 of the 12 highest monthly mins & 36 of the 60 top 5 highest monthly mins

Atlantic

47511702_AtlanticMins2000.png.3263615f169e91c2f4878b2d4fd18bc1.png

Cape May

1526197728_CapeMayMins2000.png.d0fc5910f7c49c4c2ac6480d97eae761.png

Monmouth

1263470054_MonmouthMins2000.png.6ec676ed802d8c9708d999666dcaa755.png

Ocean

536002868_OceanMins2000.png.8bf9ac74625067949b6c55bb7b1c7841.png

 

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2 hours ago, colonel_kurtz said:

Rutgers site has monthly climate tables for all NJ counties. Period of record goes back to 1895. To follow-up on Charlie's NJ Coastal plot listed below are average min temps for the counties of Atlantic, Cape May, Monmouth & Ocean. Dark red are the record high monthly mins & the lighter shade of red are to the top 5 highest monthly mins. 

https://climate.rutgers.edu/stateclim_v1/nclimdiv/index.php?stn=NJ001&elem=mint

Since 2000 these record high mins have been recorded:

Atlantic County - 10 of the 12 highest monthly mins & 36 of the 60 top 5 highest monthly mins

Cape May County - 7 of the 12 highest monthly mins & 35 of the 60 top 5 highest monthly mins

Monmouth County - 10 of the 12 highest monthly mins & 39 of the 60 top 5 highest monthly mins

Ocean County - 10 of the 12 highest monthly mins & 36 of the 60 top 5 highest monthly mins

Atlantic

47511702_AtlanticMins2000.png.3263615f169e91c2f4878b2d4fd18bc1.png

Cape May

1526197728_CapeMayMins2000.png.d0fc5910f7c49c4c2ac6480d97eae761.png

Monmouth

1263470054_MonmouthMins2000.png.6ec676ed802d8c9708d999666dcaa755.png

Ocean

536002868_OceanMins2000.png.8bf9ac74625067949b6c55bb7b1c7841.png

 

Compelling data... thanks for sharing

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10 hours ago, Chubbs said:

I found this 2009 PSU climate newsletter which has phl and pit dew point trend plots by month through 2008. Ever upwards particularly Aug in phl.

http://climate.psu.edu/features/newsletter/20090105.newsletter.pdf

Anyone that works outdoors, gardens or golfs can tell you the summers have become hotter and worse more humid.  This pretty much corroborates they speak no lies.

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  • 2 weeks later...
Just now, Chubbs said:

Its everywhere Paul, except your little cool island

Only you would believe that my man....walk away from the heat island.....do not fall into the trap!

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3 minutes ago, Chubbs said:

lol

temp80acy.png

temp80read.png

temp80georg.png

LOL! of course at airports with increasing runways and encroaching development they should and will continue to trend warmer for most years moving forward...how can they not??  However in fairness here in my little slice of coolness I am now about to close my 8th straight month of ABOVE normal temps....ruh roh!!

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