ChescoWx

We generally saw between 1" to as much as nearly 3" of rain across Chester County last evening and overnight. Some spots like West Bradford received 2.92" of rain with Glenmoore at 2.06" and East Nantmeal with 1.73" of rain. We could see quite a bit more rain later today as a cold front approaches from the west tonight. The NWS has issued a Flash Flood Watch from 2pm through 2am Wednesday. The NWS has a forecast of another 1" to 2" of rain but some of the shorter-range models show even more across some spots. Today will be our warmest day of the week with highs in the upper 80's. We fall back pretty close to normal or a bit below tomorrow with near normal temperatures through Saturday before we warm back to a few degrees above normal by next Sunday. No 90-degree temperatures are expected at least in the higher spots of the county throughout the week.

We generally saw between 1" to as much as nearly 3" of rain across Chester County last evening and overnight. Some spots like West Bradford received 2.92" of rain with Glenmoore at 2.06" and East Nantmeal with 1.73" of rain. We could see quite a bit more rain later today as a cold front approaches from the west tonight. The NWS has issued a Flash Flood Watch from 2pm through 2am Wednesday. The NWS has a forecast of another 1" to 2" of rain but some of the shorter-range models show even more across some spots. Today will be our warmest day of the week with highs in the upper 80's. We fall back pretty close to normal or a bit below tomorrow with near normal temperatures through Saturday before we warm back to a few degrees above normal by next Sunday. No 90-degree temperatures are expected at least in the higher spots of the county throughout the week.

Another warm and humid day with temperatures well up into the 80's. Rain chances are increasing tonight and through tomorrow. Some spots could pick up another 1" to 2" adding on to our rain surplus so far here in 2025. We turn a bit more comfortable with lower humidity and temperatures not far from normal for early July as we head toward the holiday weekend.

Another warm and humid day with temperatures well up into the 80's. Rain chances are increasing tonight and through tomorrow. Some spots could pick up another 1" to 2" adding on to our rain surplus so far here in 2025. We turn a bit more comfortable with lower humidity and temperatures not far from normal for early July as we head toward the holiday weekend.

Yearly rainfall surplus here in Chester County through yesterday is +0.33" - Actual 24.24" vs. Average 23.91"

We picked up just 0.05" of rain last night with the thundershower that rolled through. Today looks sunny and dry with temperatures a few degrees above normal in the mid to upper 80's. We remain humid. Shower chances increase by tomorrow afternoon and evening. We then look dry and mostly sunny for the remainder of the week with highs not too far from average for the start of July with temperatures in the mid 80's. No significant heat with highs in the 90's for at least the next week to 10 days.

We picked up just 0.05" of rain last night with the thundershower that rolled through. Today looks sunny and dry with temperatures a few degrees above normal in the mid to upper 80's. We remain humid. Shower chances increase by tomorrow afternoon and evening. We then look dry and mostly sunny for the remainder of the week with highs not too far from average for the start of July with temperatures in the mid 80's. No significant heat with highs in the 90's for at least the next week to 10 days.

After the fog burns off this morning we should see some sun returning this afternoon before more showers arrive after 8pm this evening. We should be much warmer and humid compared to yesterday's near record low maximum temperatures. We should see readings a few degrees above normal in the mid to upper 80's. Sunnier tomorrow with less humidity and temperatures near today's levels. Next rain chances arrive by Monday night and into Tuesday morning. Sunny weather returns by Wednesday with temperatures next week close to normal levels for early July. No sign of any 90-degree readings across Chester County for at least the next week to 10 days.

After the fog burns off this morning we should see some sun returning this afternoon before more showers arrive after 8pm this evening. We should be much warmer and humid compared to yesterday's near record low maximum temperatures. We should see readings a few degrees above normal in the mid to upper 80's. Sunnier tomorrow with less humidity and temperatures near today's levels. Next rain chances arrive by Monday night and into Tuesday morning. Sunny weather returns by Wednesday with temperatures next week close to normal levels for early July. No sign of any 90-degree readings across Chester County for at least the next week to 10 days.

Yesterday high temps across Chester County ranged from 64.0 at East Nantmeal and 64.6 at Glenmoore to the highest being 69.3 at West Chester. The readings at Glenmoore and East Nantmeal were tied for the 5th coldest high temperature in Chester County weather history since records began in 1893. The top 5 are West Chester 61 (1938) / Coatesville 1SW 63 (1942) / West Chester 63 (1968) / Coatesville 1SW 63 (1968) and Phoenixville 64 (1898). For many spots including Chester Springs / Devault / Glenmoore / Longwood Gardens / KMQS Coatesville, East Nantmeal and KOQN West Chester it was the all-time record for the date.

Only 64.0 for the high temp so far today this is the 5th lowest daily maximum for the date here in Chester County since 1893. Another 0.57" of rain so far here in East Nantmeal our 2 day total has been 1.64"

Only 64.0 for the high temp so far today this is the 5th lowest daily maximum for the date here in Chester County since 1893. Another 0.57" of rain so far here in East Nantmeal our 2 day total has been 1.64"

Thanks Tim!! Was a little lax of late as I just got back yesterday PM from an England/Ireland Trip...a little cooler over there!! The actual departure from normal for me were actually a bit higher at + 13.0 / +13.4 and +9.9 respectively!

Rainfall amounts were pretty variable last night across Chester County. We saw as much as 2.35" at Nottingham and 2.17" at Atglen to as little as 0.17" at Devault. It’s much cooler today with temperatures in the low 70's. Across the higher spots of the County we may not see another 90-degree reading until the middle of July. Rain chances to ramp up a bit again tonight and again on Saturday night. We warm up to the upper 80's on Sunday before we see temperatures near normal in the mid 80's for much of the next week.

Rainfall amounts were pretty variable last night across Chester County. We saw as much as 2.35" at Nottingham and 2.17" at Atglen to as little as 0.17" at Devault. It’s much cooler today with temperatures in the low 70's. Across the higher spots of the County we may not see another 90-degree reading until the middle of July. Rain chances to ramp up a bit again tonight and again on Saturday night. We warm up to the upper 80's on Sunday before we see temperatures near normal in the mid 80's for much of the next week.

Those spots that reached 90 yesterday will see the current "heat wave" end at 4 days with today's temperatures remaining in the 70's. The one exception is our own personal heat island airport at KMQS Brandywine which saw 5 such days including the highest recorded temperature at 100.3 degrees on the 24th. No other station got within 3 degrees of that mark with the next closest being the West Chester MADIS station at 97.3. Of note 4 stations only saw 3 consecutive days exceeding 90 degrees those being Devault, Warwick Township, West Grove and East Nantmeal. For a couple of stations this was their 1st heat wave in at least several years. At West Grove this was their first such occurrence since 2018 and at East Nantmeal since 2020.

Those spots that reached 90 yesterday will see the current "heat wave" end at 4 days with today's temperatures remaining in the 70's. The one exception is our own personal heat island airport at KMQS Brandywine which saw 5 such days including the highest recorded temperature at 100.3 degrees on the 24th. No other station got within 3 degrees of that mark with the next closest being the West Chester MADIS station at 97.3. Of note 4 stations only saw 3 consecutive days exceeding 90 degrees those being Devault, Warwick Township, West Grove and East Nantmeal. For a couple of stations this was their 1st heat wave in at least several years. At West Grove this was their first such occurrence since 2018 and at East Nantmeal since 2020.

High temps so far across Chester County have for the majority of stations been in the low to mid 90s. The hottest of course at KOQN Brandwine Airport at 98.6 degrees. The next warmest station just a few miles away was at the West Chester MADIS station at 95.9 degrees. Other area high temps so far West Grove 92.4 / East Nantmeal 92.1 / Avondale 93.2 / Atglen 93.6/ Glenmoore 93.9 and Chester Springs at 95.6

So far today across Chester County the majority of spots have seen high temperatures in the low to mid 90's. The big exception of course was at KOQN Brandwine Airport with a high so far of 98.6. The next hottest station was at the West Chester MADIS station at 95.9. Other Chester County highs so far - Avondale 93.2 / East Nantmeal 92.1 / West Grove 92.4 / Glenmoore 93.9 / Chester Springs 95.6 and KMQS 95.0

Glenmoore with records back to 2012 has recorded 7 heat waves in the last 13 summers. Those occurring in 2013 / 2016 / 2020/ 2022 and 3 times just last summer in 2024.

Glenmoore with records back to 2012 has recorded 7 heat waves in the last 13 summers with those occurring in 2013 / 2016 / 2020 / 2022 and 3 times just last summer in 2024.

Detail on those other 2 relatively high elevation stations in Chester County where heat waves are so rare. West Grove with data back to 2009 has also only recorded 5 heatwaves - occurring in 2011 /2012 (2x) / 2013 and the last time back in 2018. Also over at Atgen with data back to 2012 - only 3 times in the last 13 summers have they recorded a heat wave - those being in 2013 /2023 and 2024.

More detail on the other Chester County sites where heat waves are rare. At West Grove with data since 2009 there have also only been 5 heat waves. With those occurring in 2011 / 2012 (2x) / 2013 and the last time in 2018. Also over in Atglen with records since 2012 - only 3 heat waves in the last 13 summers occurring in 2013 / 2023 and 2024.

The NWS has the next 5 days here in East Nantmeal with forecast high temperatures over 90 degrees. I have been taking observations here for 22 summers since 2004. I have only experienced a "heat wave" (3 consecutive days of 90+ temps) but 5 times. 2006 / 2008 (2x) / 2010 and the last time in 2020. In each of those years we only saw 3 straight days with 90 plus readings. Other high elevation spots in the county including Atglen and West Grove has also seen very few defined "heat waves". This week sure looks likely to even in these higher spots result in at least 3 straight days of heat.

The NWS has the next 5 days here in East Nantmeal with forecast high temperatures over 90 degrees. I have been taking observations here for 22 summers since 2004. I have only experienced a "heat wave" (3 consecutive days of 90+ temps) but 5 times. 2006 / 2008 (2x) / 2010 and the last time in 2020. In each of those years we only saw 3 straight days with 90 plus readings. Other high elevation spots in the county including Atglen and West Grove has also seen very few defined "heat waves". This week sure looks likely to even in these higher spots result in at least 3 straight days of heat.