ChescoWx

So I have updated the average number of 90 degree days to include the Philadelphia International Airport and overlaid that analysis over the Chester County data shared yesterday. You can clearly see the impact of the urban heat island (UHI) on the official Philadelphia climate site (the red line is the rapid heat growth). While 90 degrees are declining in Chester County they are rapidly increasing in frequency at the airport. So far in the 2020's PHL is averaging more than 3 weeks of additional 90+ days than here in Chester County. In 1940 when weather observations started at the airport it's footprint was only around 300 acres. Since 1940 the PHL Airport has expanded to over 2,600 acres. That is a staggering 2,078% growth. The significant impact to the official Philadelphia climate data due to this rapid expansion is clearly illustrated below. Especially starting in 1970 when we began to see huge increases in the addition of asphalt, concrete and taxi ways. In 1970 alone the airport added 64% more gates and buildings. Just 2 years later in 1972 runways were expanded to handle 747's. Then 4 new terminals were added in 1977 and parking spaces were increased from 5k to 20k. Rapid increase in asphalt continued in 2002 with an additional 8 miles of pavement added to the site. In 2005 runways were increased and as of today there is now 33,000 feet of asphalt runway at the airport. Next time you see the reporting of 90 degree days on TV.....keep in mind where those figures are coming from - it is not where people live.

0.22" of rain this AM from the thunderstorm...briefly lost power. Should see sun returning today and our warmest day for at least the next couple weeks as temps make a run at the 80's today. By contrast on Friday we will struggle to escape the 50's for high temps. Chester County records for today: High 98 degrees at Phoenixville (1930) / Low 29 degrees at both West Chester and Morgantown (1974) / Rain 2.90" Coatesville 2W (1992)

0.22" of rain this AM from the thunderstorm...briefly lost power. Should see sun returning today and our warmest day for at least the next couple weeks as temps make a run at the 80's today. By contrast on Friday we will struggle to escape the 50's for high temps. Chester County records for today: High 98 degrees at Phoenixville (1930) / Low 29 degrees at both West Chester and Morgantown (1974) / Rain 2.90" Coatesville 2W (1992)

Can we say UHI......totally useless numbers these days from PHL

Always a "trick" when the data fails to support alarmist views.....

No bias in basket of stations they are all available NOAA / AWOS and MADIS sites at our disposal

The below will not be received well by climate alarmist on this site. But with the summer season quickly approaching and the fact I now have access to much more station data then in the past. I went back to the complete Chester County PA data set of 26 stations with some having data back to the 1890's. I wanted to see if the number of hot days as defined by 90 degrees is increasing or decreasing here in Chester County?? I separated the stations by their elevation above sea level as we know with increasing elevation there are far less days that surpass 90 degrees. Of the 26 stations in the data the majority (17) stations are sited below 500 ft above sea level (ASL) While only 9 stations are sited at above 500 ft ASL. Going forward with the data here in the 2020's we will still have the majority of stations (11) that are located at lower elevations while 7 of the current stations are in the relatively higher spots. The data which is analyzed by average number of 90 degree days by decade is quite clear that the number of 90 plus days is decreasing at all elevations. In fact the 2020's to date are trending as the 2nd least 90+ days at the lower spots and at the lowest level in the higher spots. Can you imagine back when we really had hot summers like in the 1930's through 1950's how tough it must have been without air conditioning??

With the summer season quickly approaching and the fact I now have access to much more station data then in the past. I went back to the complete Chester County PA data set of 26 stations with some having data back to the 1890's. I wanted to see if the number of hot days as defined by 90 degrees is increasing or decreasing here in Chester County?? I separated the stations by their elevation above sea level as we know with increasing elevation there are far less days that surpass 90 degrees. Of the 26 stations in the data the majority (17) stations are sited below 500 ft above sea level (ASL) While only 9 stations are sited at above 500 ft ASL. Going forward with the data here in the 2020's we will still have the majority of stations (11) that are located at lower elevations while 7 of the current stations are in the relatively higher spots. The data which is analyzed by average number of 90 degree days by decade is quite clear that the number of 90 plus days is decreasing at all elevations. In fact the 2020's to date are trending as the 2nd least 90+ days at the lower spots and at the lowest level in the higher spots. Can you imagine back when we really had hot summers like in the 1930's through 1950's how tough it must have been without air conditioning??

With the summer season quickly approaching and the fact I now have access to much more station data then in the past. I went back to the complete Chester County PA data set of 26 stations with some having data back to the 1890's. I wanted to see if the number of hot days as defined by 90 degrees is increasing or decreasing here in Chester County?? I separated the stations by their elevation above sea level as we know with increasing elevation there are far less days that surpass 90 degrees. Of the 26 stations in the data the majority (17) stations are sited below 500 ft above sea level (ASL) While only 9 stations are sited at above 500 ft ASL. Going forward with the data here in the 2020's we will still have the majority of stations (11) that are located at lower elevations while 7 of the current stations are in the relatively higher spots. The data which is analyzed by average number of 90 degree days by decade is quite clear that the number of 90 plus days is decreasing at all elevations. In fact the 2020's to date are trending as the 2nd least 90+ days at the lower spots and at the lowest level in the higher spots. Can you imagine back when we really had hot summers like in the 1930's through 1950's how tough it must have been without air conditioning??

Only made it down to 59 degrees here in EN. Today should be the best weather day of the week with sun and temps reaching the mid to upper 70's. Rain chances return by late tonight. Chester County area records for today: High 99 degrees at Phoenixville (1930) / Low 28 at Coatesville (1974) / Rain 2.74" Coatesville (1908)

Only made it down to 59 degrees here in EN. Today should be the best weather day of the week with sun and temps reaching the mid to upper 70's. Rain chances return by late tonight. Chester County area records for today: High 99 degrees at Phoenixville (1930) / Low 28 at Coatesville (1974) / Rain 2.74" Coatesville (1908)

Thanks CW! That is a great question....

Chances of rain will continue each and every day this week. The least chances are today and during the day tomorrow. Best rain chances are Thursday with Wednesday being the warmest day with temps in the 80's. Chester County records for today: High 94 degrees at Phoenixville (1930) / Low 28 degrees at Devault 1W (1954) / Rain 2.90" in Honey Brook (1989)

Chances of rain will continue each and every day this week. The least chances are today and during the day tomorrow. Best rain chances are Thursday with Wednesday being the warmest day with temps in the 80's. Chester County records for today: High 94 degrees at Phoenixville (1930) / Low 28 degrees at Devault 1W (1954) / Rain 2.90" in Honey Brook (1989)

We are up to 0.63" of rain today for a 2 day total of 0.87". We are at the high so far today at 55.3 degrees

Just calming facts over climate alarmists and doomers.....it does thought make them upset!

LOL!! I am far from a climate change denier. In fact forkyfork I am a climate change embracer!!!! Now the fact that this climate change is simply typical cyclical climate change is where we differ. But I would love to debate you since you sound like a climate alarmist and I enjoy showing the facts that all that has happened has of course happened before which clearly gets you fired up!!

Actual climate impact forecasts continue to fall far short on actual verification....

Actual un-adjusted facts over feelings....

Charlie I thought I would go back and run both your Phoenixville site against the other site with continuous data for the period 1893 to 2016 - West Chester. Without those chilling tweaks made to the actual data. We again see nothing alarming here at all. West Chester is mighty flat....Phoenixville with some typical warm vs cold cycles also not very scary at all!

Thanks Charlie!!! 6 of the 10 warmest Aprils are prior to 1985.....and 5 of the 10 starts are before 2000. As always nothing to support climate alarmism.

0.59" of rain since yesterday with 0.35" since midnight. Showers and another chilly day in store with temps staying in the 50's for most spots in the county. Clouds and showers but warmer temps look likely for the entire work week with Tuesday looking like the driest day with maybe even some sun at times. Wednesday looks the warmest with temps near 80 degrees. Chester County records for today: High 94 degrees at Phoenixville (1930) / Low 27 degrees at Phoenixville (1966) / Rain 2.01" at both Nottingham and Warwick Township (2019)

0.59" of rain since yesterday with 0.35" since midnight. Showers and another chilly day in store with temps staying in the 50's for most spots in the county. Clouds and showers but warmer temps look likely for the entire work week with Tuesday looking like the driest day with maybe even some sun at times. Wednesday looks the warmest with temps near 80 degrees. Chester County records for today: High 94 degrees at Phoenixville (1930) / Low 27 degrees at Phoenixville (1966) / Rain 2.01" at both Nottingham and Warwick Township (2019)

0.17" of rain so far today. It is also the chilliest high temperature for today's date across the County in 32 years. High temps across Chesco have ranged from as low as 51.8 in Atglen to 54.6 at West Chester

Chilly weekend ahead with some showers temps will struggle to escape the 50's in most spots. Shower chances look to continue for much of the week ahead. The warmest day should be Wednesday with highs near 80 degrees. We should see a change to cooler than normal weather beginning next weekend and lasting through the mid to late month period. Chester County wide records for today: High 91 degrees at Phoenixville (1928) / Low 26 degrees at Devault 1W (1957) / Rain 2.12" at Coatesville 1SW (1922)