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E PA/NJ/DE Winter 2025-26 Obs/Discussion


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I ended up bottoming out at 17 yesterday morning and hit a high of 26.  Am currently at the same low of 17 with dp 14.

Looks like a warm-up and rain by the end of the week and then another cold shot.  That means that snow piles and plowed mounds will saturate with the rain and then freeze into glaciers. :lol:

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We had quite a few spots with lows in the single digits. The lowest was the 3.8 degrees at Warwick Township. The sun returns today and we should see some melting of the snow but with high temperatures remaining below freezing and the low sun angle it will be limited. Our much colder than normal December continues before we finally warm up to above normal on Thursday and Friday with rain arriving on Thursday night. Expect some fog over the melting snow with this system and most of the snow cover will be gone by Friday morning. Rain amounts could approach an inch in some spots. Looking ahead to Christmas week temperatures look to be not too far from normal for Christmas, but chances of a White Christmas look slim.image.png.b3f9a9fc627f2b37f3f949d5d44bca6f.pngimage.thumb.png.ed1419d7ce505371564d85d918d0ec51.png

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With this week's snow event across Chester County PA we are now up to 9.9" of snow so far this season. Through the end of December our typical average snow total is 7.1". So, what could this mean for our snow totals by the time the final flake falls possibly as late as April? Well to date this is the 36th snowiest December with records back to 1893. Below is all 36 years along with where we ended up for seasonal snow that winter. Of note 25 of the 35 years or 71% of the time we ended up with above average seasonal snowfall. Average seasonal snowfall ranges between 32" to 36" across the county. The overall average snowfall across these 35 years was 48.4" of snow. The greatest seasonal snow was the 95.0" that fell in 1898-1899 and the least was the 17.1" in 1912-1913. For Team Snow you should feel fairly good that we end up with above average snowfall this season.

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1 hour ago, ChescoWx said:

With this week's snow event across Chester County PA we are now up to 9.9" of snow so far this season. Through the end of December our typical average snow total is 7.1". So, what could this mean for our snow totals by the time the final flake falls possibly as late as April? Well to date this is the 36th snowiest December with records back to 1893. Below is all 36 years along with where we ended up for seasonal snow that winter. Of note 25 of the 35 years or 71% of the time we ended up with above average seasonal snowfall. Average seasonal snowfall ranges between 32" to 36" across the county. The overall average snowfall across these 35 years was 48.4" of snow. The greatest seasonal snow was the 95.0" that fell in 1898-1899 and the least was the 17.1" in 1912-1913. For Team Snow you should feel fairly good that we end up with above average snowfall this season.

 

Interesting that when ever we get above average snow in Dec. we never get shut out the rest of the season. 

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How cold has the first half of December been....well here in Chester County PA with 132 years of climate data this December is the 11th coldest start to the final month of the year. Below are the 20 coldest first halfs of December. While we will moderate a bit to near or slightly above normal for the remainder of this month we will still end December with below normal temperatures and finish the 2025 calendar year with 7 of the 12 months averaging below normal temperatures.
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13 hours ago, ChescoWx said:

We had quite a few spots with lows in the single digits. The lowest was the 3.8 degrees at Warwick Township. The sun returns today and we should see some melting of the snow but with high temperatures remaining below freezing and the low sun angle it will be limited. Our much colder than normal December continues before we finally warm up to above normal on Thursday and Friday with rain arriving on Thursday night. Expect some fog over the melting snow with this system and most of the snow cover will be gone by Friday morning. Rain amounts could approach an inch in some spots. Looking ahead to Christmas week temperatures look to be not too far from normal for Christmas, but chances of a White Christmas look slim.image.png.b3f9a9fc627f2b37f3f949d5d44bca6f.pngimage.thumb.png.ed1419d7ce505371564d85d918d0ec51.png

Yea White Christmas is essentially dead outside of Kamu’s lingering snow pile. 
 

I could see some localized street flooding and stream rises from the next system Thursday into Friday. 
 

11 degrees this morning in Media.

Currently 22f with a 12f dewpoint identical numbers from 24 hours ago. Snowpack doing its refrigerator thing. 

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Today will be near to slightly above normal with highs in the middle 40's. We warm a bit more tomorrow into the upper 40's and then the low 50's by Friday. Rain arrives by Thursday night and would expect to see some areas of fog as the snow melt ramps up tomorrow night. We could see 3/4 to an inch of rain. We then turn colder again for the weekend and into the start of Christmas week.

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15 hours ago, Kevin Reilly said:

Yea White Christmas is essentially dead outside of Kamu’s lingering snow pile. 
 

I could see some localized street flooding and stream rises from the next system Thursday into Friday. 
 

11 degrees this morning in Media.

Currently 22f with a 12f dewpoint identical numbers from 24 hours ago. Snowpack doing its refrigerator thing. 

Couldn't think of a better gift for drought guy

 

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My forecast did suggest a slow start. Enjoy the fall weather while you can. Come january you will be wishing for temps above 45 . I expect more mix events than anything else in late nov into mid dec as the pattern sets up for january------- well I was pretty close. We will get 1-2 days this week above 45 degrees.  Thank god it will melt the .50 in of snow equivalent liquid precip with the expected 1-2 inches of rain. That will help the drought somewhat for the stream base flows but the main problem is that the frost in the soil horizon is already pretty deep especially in the LV. The groundwater is likely not going to be recharged at all. You will see real muddy conditions in the yard for a few days as the topsoil is unfrozen, but then back into the deep freeze.
 
I would love to see t storms Thursday night. The snow will quickly disappear with sublimation from fog and from the heavy rain.  The down trees on Friday will be a huge problem from the winds as the soils around the tree roots will soften up just enough to be wind thrown before freezing.  Main concern for me, if it rains hard enough Friday afternoon, the expected winds may not dry our the road surfaces from the excessive ponding and we will have flash freeze conditions Friday evening in many areas. Saturday morning may not be very nice around our region.  
 
Also, my utility bill is doubled from last year according to my usage and I still have have a 15 days to go. Going to be many homeowners wishing they had not spent so much on Christmas gifts come mid January when they get their utility bill.  This chart says it all just posted by Mt Holly.Observed mean temperatures, departures from normal, and coldest since stats for the first half of December 2025, which has been well below normal.
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