ChescoWx

Today will be our last above normal day though Wednesday. Today’s temperature will approach 70 degrees especially the further west you go. Tomorrow temperatures will struggle to escape the lower 50's. We should see some showers along the cold front during the morning tomorrow with between 0.10" to 0.40" of rain possible. By Monday temperatures in the higher spots will likely stay in the 40's with a freeze likely Monday night into Tuesday morning. We start to moderate with temperatures back to several degrees above normal in the low 70's by Friday.

Today will be our last above normal day though Wednesday. Today’s temperature will approach 70 degrees especially the further west you go. Tomorrow temperatures will struggle to escape the lower 50's. We should see some showers along the cold front during the morning tomorrow with between 0.10" to 0.40" of rain possible. By Monday temperatures in the higher spots will likely stay in the 40's with a freeze likely Monday night into Tuesday morning. We start to moderate with temperatures back to several degrees above normal in the low 70's by Friday.

The Devault DEOS station recorded a high of 90.7 yesterday this is the first 90 degree reading at any County station so far this year. None of the other stations reached 90 but upper 80's were common across the valley locations. Today should be 10 to 12 degrees cooler with highs in the mid to upper 70's. This is still 10+ degrees above normal levels. We chill well below normal by Sunday with highs remaining in the low to mid 50's with shower chances increasing. A freeze remains a possibility by Tuesday morning.

The Devault DEOS station recorded a high of 90.7 yesterday this is the first 90 degree reading at any County station so far this year. None of the other stations reached 90 but upper 80's were common across the valley locations. Today should be 10 to 12 degrees cooler with highs in the mid to upper 70's. This is still 10+ degrees above normal levels. We chill well below normal by Sunday with highs remaining in the low to mid 50's with shower chances increasing. A freeze remains a possibility by Tuesday morning.

Warmest day of the year 87.5 for the high in East Nantmeal

As per the World Meteorological Organization (WMO) Current climate normals are calculated using the past 3 complete decades and recalculated every 10 years. So, I went back and calculated what was normal for the last 10 climate normal periods specifically for Chester County PA. The below show what the climate normals were for the 10 years following each calculation with the earliest being 1901-1930 normals and the latest being our current climate normal period of 1991-2020. Averages in red are the warmest and blue the coolest across those periods. Of note our warmest climate normal period was 1931-1960 and our coolest period was 1961-1990.

As per the World Meteorological Organization (WMO) Current climate normals are calculated using the past 3 complete decades and recalculated every 10 years. So, I went back and calculated what was normal for the last 10 climate normal periods specifically for Chester County PA. The below show what the climate normals were for the 10 years following each calculation with the earliest being 1901-1930 normals and the latest being our current climate normal period of 1991-2020. Averages in red are the warmest and blue the coolest across those periods. Of note our warmest climate normal period was 1931-1960 and our coolest period was 1961-1990.

As per the World Meteorological Organization (WMO) Current climate normals are calculated using the past 3 complete decades and recalculated every 10 years. So, I went back and calculated what was normal for the last 10 climate normal periods specifically for Chester County PA. The below show what the climate normals were for the 10 years following each calculation with the earliest being 1901-1930 normals and the latest being our current climate normal period of 1991-2020. Averages in red are the warmest and blue the coolest across those periods. Of note our warmest climate normal period was 1931-1960 and our coolest period was 1961-1990.

Today will be out last day with temperatures in the 80’s with highs in some valley spots getting within a couple degrees of 90. We fall back into the 70’s tomorrow and Saturday before we fall back below normal by Sunday through next Tuesday. Some shower chances later tomorrow and a better chance on Saturday night. We could have some freeze or frost concerns by Monday night into Tuesday morning.

Today will be our last day with temperatures in the 80’s with highs in some valley spots getting within a couple degrees of 90. We fall back into the 70’s tomorrow and Saturday before we fall back below normal by Sunday through next Tuesday. Some shower chances later tomorrow and a better chance on Saturday night. We could have some freeze or frost concerns by Monday night into Tuesday morning.

I remember this well! I was playing in a stickball marathon in philly and received the worst sunburn of my life! memories.....

Here in Chester County so far no climate stations have touched 90 this month. The last time we hit 90 in the month of April in Chesco was April 7, 2010 when it hit 91 at Phoenixville 1E. The earliest 90+ day in County history was way back on March 22, 1948 with a 90 at Phoenixville 1E

We picked up between 0.03" to 0.25" of rain with more across southern areas. Today will be our warmest day of the week and the year so far with temperatures reaching the middle to upper 80's. The record County high for today is 89 degrees set back in 1941 (Phoenixville) and 1896 (Kennett Square). Still unseasonable warm tomorrow through Saturday. We chill back to below normal by Monday and temperatures in some of the higher spots may struggle to escape the unseasonably cold 40's in the afternoon. There will also be a potential for a frost or freeze by Tuesday morning. Below normal temperatures appear increasingly likely for the remainder of April. Best chances of some much-needed rain looks to be Friday with better chances with the cold front on Sunday afternoon.

We picked up between 0.03" to 0.25" of rain with more across southern areas. Today will be our warmest day of the week and the year so far with temperatures reaching the middle to upper 80's. The record County high for today is 89 degrees set back in 1941 (Phoenixville) and 1896 (Kennett Square). Still unseasonable warm tomorrow through Saturday. We chill back to below normal by Monday and temperatures in some of the higher spots may struggle to escape the unseasonably cold 40's in the afternoon. There will also be a potential for a frost or freeze by Tuesday morning. Below normal temperatures appear increasingly likely for the remainder of April. Best chances of some much-needed rain looks to be Friday with better chances with the cold front on Sunday afternoon.

Well above normal temperatures continue through Saturday before we see another pattern change to normal to below average temperatures lasting through much of the rest of the month. The warmest day looks like Wednesday with highs in the mid to upper 80's. Shower chances increase Friday night and especially Saturday night into Sunday with the cold front. Temperatures by next Monday may struggle to escape the mid-50's.