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E PA/NJ/DE Spring 2025 Obs/Discussion


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After our below normal temperature winter across the county we have now seen a much warmer than normal March. Through today we are at the 25th warmest March since 1893. With warmer days before we finish the month we could finish close to a top 10 warm Month. Below is the average temperature trend line for all March months since 1893. Average temperatures have clearly not changed much over the past 132 years across the area.

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Our warmest day since early November is on tap today across the area. Here in East Nantmeal we are already up to 73 degrees here at 1030am. Some valley locations across the area could reach or exceed 80 degrees today! This is nowhere near the County record of 88 degrees back in 1945. A backdoor cold front moving from NE to SW will try to cross the area toward midnight tonight. How far SW this front makes will make a huge difference across our area tomorrow. Currently the National Weather Service has highs tomorrow in the lower 70's here in East Nantmeal. This assumes the front remains NE of our area. However, some of the latest models suggest the front may almost make it to the Mason Dixon line. If this occurs we may see high temperatures, especially across Northern Chester County being at least 10 to 15 degrees lower than the current forecast. A 20-degree difference is possible from the upper 40's to the north to the 70's to the south. Rain chances to increase by Monday morning with some models showing as much as an inch of rain by late Monday night.

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Am actually sitting at 82 at post time.  Last time I had this temp was back on Oct. 22, 2024.  Will have to see if it keeps going up. I was surprised at how fast it shot up this morning (low was 53).  Didn't expect the rise to happen until later.

Current dewpoint is 55 and it is breezy.

14 hours ago, KamuSnow said:

Been getting some rain here off and on for the last few hours. Probably won't be able to see the 12% solar eclipse at sunrise tomorrow morning due to clouds. Liking the rain though!

I had light rain on and off yesterday afternoon but not enough to tip the bucket until sometime before midnight, with 0.01".

My east-viewing is blocked by trees and houses so even though I tried, I couldn't see what would have been just a few minute 11% - 12% sun chomp.  I was actually surprised that the sky wasn't completely overcast as it usually is during celestial events. :lol: There was just some cirrus here this morning so the viewing would have been okay I think.

 

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A very very tough temperature forecast as I mentioned this morning. We reached 82.2 degrees here in East Nantmeal this PM....but a backdoor cold front is on the march from off the relatively very cold mid 40's ocean. The National Weather Service has lowered their low temps to the upper 40's now across NW Chesco....some of the latest models (not a forecast model temps at 11pm tonight from the NAM) have 40's across NE Chesco to still near 70 degrees across SW Chester County. If the NAM model is correct we may never get out of the chilly 50's tomorrow across much of Northern Chesco despite the current NWS Forecast of high temps in the low 70's. Should be interesting!

image.thumb.png.fc30936afcc161584bc53a8ad8c35a1f.png

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3 minutes ago, ChescoWx said:

A very very tough temperature forecast as I mentioned this morning. We reached 82.2 degrees here in East Nantmeal this PM....but a backdoor cold front is on the march from off the relatively very cold mid 40's ocean. The National Weather Service has lowered their low temps to the upper 40's now across NW Chesco....some of the latest models (not a forecast model temps at 11pm tonight from the NAM) have 40's across NE Chesco to still near 70 degrees across SW Chester County. If the NAM model is correct we may never get out of the chilly 50's tomorrow across much of Northern Chesco despite the current NWS Forecast of high temps in the low 70's. Should be interesting!

image.thumb.png.fc30936afcc161584bc53a8ad8c35a1f.png

I'll take that image/map for the rest of the summer...

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