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I was asked to compare PHL Airport vs East Nantmeal Twp. In the western philly burbs of Chester County PA for climate since 2004. (see full panel below) Summer afternoons: PHL’s highs run 5.4–6.3°F warmer from June through September. Against the whole county the gap was mainly at night; against East Nantmeal it’s mainly in the daytime. That fits what the siting check found: your fan-aspirated Davis records cool highs. Elevation adds to it. Overnight lows: PHL is warmer every month, from 2.8°F in April to 5.1°F in August. Rain and snow: Precipitation: East Nantmeal gets 50.35" a year to PHL’s 45.56". It’s wetter in most months, especially July (5.62" vs 4.66"). Snow: East Nantmeal averages 35.8" a season against 22.7" at PHL, about 58% more. EN had more snow than PHL in all 22 seasons. February shows the biggest difference: 13.4" vs 8.4". Is the temperature gap widening? Yes. It has grown about 0.46°F per decade, mostly in daytime highs (+0.64). PHL warmed about 1.0°F per decade over these 22 years, against 0.55 at East Nantmeal. I will post up Chester County as a whole later. Let me know if any questions. Thanks!

I was asked to compare PHL Airport vs East Nantmeal Twp. In the western philly burbs of Chester County PA for climate since 2004. (see full panel below) Summer afternoons: PHL’s highs run 5.4–6.3°F warmer from June through September. Against the whole county the gap was mainly at night; against East Nantmeal it’s mainly in the daytime. That fits what the siting check found: your fan-aspirated Davis records cool highs. Elevation adds to it. Overnight lows: PHL is warmer every month, from 2.8°F in April to 5.1°F in August. Rain and snow: Precipitation: East Nantmeal gets 50.35" a year to PHL’s 45.56". It’s wetter in most months, especially July (5.62" vs 4.66"). Snow: East Nantmeal averages 35.8" a season against 22.7" at PHL, about 58% more. EN had more snow than PHL in all 22 seasons. February shows the biggest difference: 13.4" vs 8.4". Is the temperature gap widening? Yes. It has grown about 0.46°F per decade, mostly in daytime highs (+0.64). PHL warmed about 1.0°F per decade over these 22 years, against 0.55 at East Nantmeal. I will post up Chester County as a whole later. Let me know if any questions. Thanks!

maybe warmer? gw/cc

Spectacular mid fall day today.

I guess a few post-frontal days in the 40's could be considred "cold" if your avg is 52

1877-78 incoming?

Hopefully you miss!

brings down the cool...no cold to be had

clouds over the top of RMNP but not snow

Accuweather long range seems to follow the same curve. As always …….

4.5 hours leaf blowing today , absolute disaster

Is Burt Reynolds with you there?

A warmer Canada is colder than Tolland.

effects of the ssw already being felt, normally models would come out earlier starting the second week of november

Correct - plus all these above average temp months in a row and this abnormally long stretch of spring/summer like weather the last couple of weeks is giving some folks a false sense of security that EL NINO will protect us from the cold and snow well into winter..............

Long range gfs brings down the cold

December is so far away . No one has a clue yet that far. Long range forecasting hasn't been right in years.

Models come out earlier tomorrow

Judah Cohen says the models don't have a handle on this set up yet - he has an interview video which I can't post here for some reason on FOX. He is not sure what might happen yet going into December.

LR ext modeling (Euro and GFS) are starting to show a cool down(significant?) in the last week of November to BN temps. Shoulder season modeling should be taken with a grain of salt FWIW. However, both show winter arriving on time ironically (after all of this warm wx). LR ext modeling was wrong about October being cold, so buyer beware!

Good luck!!

My Dec 22nd first snowfall prediction would line up with that. .

This post from 10/23 is aging well. Per Don post above and looking at LR guidance not seeing much if any chance of CP getting to 32 or below before 3rd week of November and at this point the odds inching up for December,