ChescoWx

This morning’s low of 55.7 was the chilliest morning here in East Nantmeal since the 55.1 reading back on June 4th. The lowest temperature around the county this morning was the 52.3 at the Warwick Township station. The first 2 days of August have averaged around 10 degrees below normal temperatures. Today will continue the below normal start to the month, but we have a quick 2 day warm up on Monday and Tuesday with temperatures not too far from average in the mid 80’s. Starting Wednesday we chill down a bit again with temperatures finishing out the work week a few degrees below normal. There is no rain at all in the forecast for this week.

The PHL Airport recorded 21 days over 90 degrees in July. The average high temperature was 90.5 degrees. Our own little heat island spot at Phoenixville clocked in at a toasty 89.2 average high with 15 such days. The growing disparity between Urban Heat Island stations and more rural stations is best highlighted when looking at the average high temperature comparison looking at the airport since 1970 when the heat island problems began in earnest. Comparing there vs. The Phoenixville Cooperative data vs. All other Chester County average high temperatures since 1970. While Phoenixville (purple line) has shown warming during our current warm climate cycle they are now clearly being surpassed by the PHL Airport (red line). The rest of Chester County (blue line) has warmed much slower than both PHL and Phoenixville.

Hey Cape don't be afraid of the facts and raw unadjusted data....nothing flawed...and nothing to fear - stay calm!! Charlie does not sweat it...he simply tries to explain away the actual raw data with altered/adjusted facts to disprove the actual raw data. It is a healthy debate!

Overall across Chester County PA as if you had to be told it was a hot month! Our average temperature across the county was 77.4 degrees. This is the 10th warmest July on record over the 133 years of climate records beginning in 1894. The top 5 hottest July months were 1999 - 78.6 / 1901 - 78.5 / 2011 - 78.3 / 1955 - 78.2 and 2020 at 78.0. It was also a wet month with an average across the county stations of 6.83" this is the 20th greatest average rainfall in July. The greatest average was way back in 1919 with an average of 11.64" of rain.

Overall across Chester County PA as if you had to be told it was a hot month! Our average temperature across the county was 77.4 degrees. This is the 10th warmest July on record over the 133 years of climate records beginning in 1894. The top 5 hottest July months were 1999 - 78.6 / 1901 - 78.5 / 2011 - 78.3 / 1955 - 78.2 and 2020 at 78.0. It was also a wet month with an average across the county stations of 6.83" this is the 20th greatest average rainfall in July. The greatest average was way back in 1919 with an average of 11.64" of rain.

Yesterday was the 5th chilliest low maximum temperature for the date with highs remaining in the 60's at Atglen, West Grove and East Nantmeal and just past 70 degrees at most other locations. We should remain below normal today but with highs a good 8 to 10 degrees above yesterday. A great weather week ahead with temperatures at or a bit below normal for the first week of August. Low's this morning were in the 50's with the lowest at Warwick Twp. at 54.8 degrees. Lows continue in the 50's the next couple of nights with lows not too far from 60 for the rest of this week. So a great break for all of our A.C.'s.

Yesterday was the 5th chilliest low maximum temperature for the date with highs remaining in the 60's at Atglen, West Grove and East Nantmeal and just past 70 degrees at most other locations. We should remain below normal today but with highs a good 8 to 10 degrees above yesterday. A great weather week ahead with temperatures at or a bit below normal for the first week of August. Low's this morning were in the 50's with the lowest at Warwick Twp. at 54.8 degrees. Lows continue in the 50's the next couple of nights with lows not too far from 60 for the rest of this week. So a great break for all of our A.C.'s.

The West Grove DEOS station recorded 0.72" and 6.99" for the month of July

We finished July with an average temperature of 75.6 here in East Nantmeal this is the 5th warmest in my 22 years at this location. The warmest being back in 2011 at 77.0 degrees. After yesterday's 2.35" of rain we finished the month with 8.86" of rain this was the 3rd wettest July with the most occurring back in 2018 when we recorded 9.54" of rain. We have turned cooler after the frontal passage yesterday and today will be at least 10 degrees below normal for the first day of August. The next week will feature below normal temperatures with the exception of both Monday and Tuesday, which should be about normal for the 1st week of August. Nighttime lows will reach the 50's on each of the next 3 nights.

We finished July with an average temperature of 75.6 here in East Nantmeal this is the 5th warmest in my 22 years at this location. The warmest being back in 2011 at 77.0 degrees. After yesterday's 2.35" of rain we finished the month with 8.86" of rain this was the 3rd wettest July with the most occurring back in 2018 when we recorded 9.54" of rain. We have turned cooler after the frontal passage yesterday and today will be at least 10 degrees below normal for the first day of August. The next week will feature below normal temperatures with the exception of both Monday and Tuesday, which should be about normal for the 1st week of August. Nighttime lows will reach the 50's on each of the next 3 nights.

We have a Flash Flood Watch in effect from 2pm through 6am Friday morning. Rain and storm chances begin to increase as we move into this afternoon and into the night. One to as much as three inches could fall in spots. Following the rain we cool down and clear out by Friday night with a fantastic weather weekend on tap for the entire area. Days mainly in the 70's with nights in the 50's. Pleasant weather looks to continue for much of next week.

We have a Flash Flood Watch in effect from 2pm through 6am Friday morning. Rain and storm chances begin to increase as we move into this afternoon and into the night. One to as much as three inches could fall in spots. Following the rain we cool down and clear out by Friday night with a fantastic weather weekend on tap for the entire area. Days mainly in the 70's with nights in the 50's. Pleasant weather looks to continue for much of next week.

Today should be our last 90-degree day for at least the next 10 or so days. We will see rain chances ramping up tomorrow afternoon into the evening with a cold front. We could see at least an inch of rain in many spots across the area with showers lasting until Friday. On Friday night we see some autumn like weather arrive for the weekend. Highs mostly in the 70's with lows in the 50's. Below normal temperatures look to continue through much of next week.

Today should be our last 90-degree day for at least the next 10 or so days. We will see rain chances ramping up tomorrow afternoon into the evening with a cold front. We could see at least an inch of rain in many spots across the area with showers lasting until Friday. On Friday night we see some autumn like weather arrive for the weekend. Highs mostly in the 70's with lows in the 50's. Below normal temperatures look to continue through much of next week.

Looks hot to me! Even Atglen has almost eclipsed 90....just a tad short at 89.9 - West Grove also so close at 89.7 "only" 88.5 so far in EN but we still have some time.....

Again the detail behind the overall calculation that supports that PHL Airport has over the last 25 years been heating more quickly than Chester County thanks to UHI. I don't think this is a surprise to anyone is it?

Below with the supporting calculations are Phoenixville longest complete data vs. PHL over the last 25 years. The 2 stations are clearly not warming at the same rate....but the trending increasing differences between the 2 stations and Chester County as a whole is due to UHI at the airport.

This is pretty straight forward. I am simply plotting the degree of warming delta for each year at PHL vs each and every station in Chester County. They are not warming at the same rate as PHL. The above analysis across all Chester County stations quite clearly illustrates that Chester County individual stations along with the overall average for Chester County are not warming at the same pace as PHL that is due to the UHI problems at PHL.

PHL vs Longwood Gardens??? you guessed it - are any stations in Chester County warming as fast as our UHI contaminated PHL Airport?

How about that trained spotter station data from East Nantmeal vs PHL - yep you guessed it warming faster at PHL

How about our own little warm spot....Phoenixville vs PHL....again warming faster of course at the PHL UHI problem

Let's look at some individual stations - how about our climate reference network? Avondale 2N vs PHL

Again easy to fact check with the actual data and all stations not cherry picking a few included. To say CHESCO average temps are rising as the same rate as PHL if just false. Trend line paints the real story.

Not politics as both parties have cost our nation and it's taxpayers way too much for programs and studies that will not reduce or increase our temps by even 0.5 degrees.