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Central PA Summer 2023


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Sterling has a great write up for Monday. CTP has nada. 
 

.LONG TERM /MONDAY THROUGH FRIDAY/...
Monday continues to be shaping up to be a potential impactful
weather day with increasing confidence for severe thunderstorms in
our forecast area. A strong mid-level trough will eject from the
Midwest into the Ohio Valley by Monday. The trough is expected to
strengthen and become neutral to negatively tilted during the day on
Monday. In response, surface low pressure will develop over Southern
Michigan and track into Southern Ontario during the day. Models
differ on the idea of a prefrontal shortwave ahead of the trough,
which may lead to early convection on Monday out ahead of the main
trough. This has led to uncertainty regarding the amount of
destabilization.

Out ahead of the system, the air mass is expected to become very
moist as a result of strengthening southerly winds. Most of the
guidance shows precipitable water values near or exceeding 2” east
of the Blue Ridge with values over 1.75 west of the Blue Ridge. This
increasing moisture advection may lead to low-level clouds and
precipitation which may also hinder destabilization during the day,
resulting in further uncertainty.

Despite the uncertainty, with the trough becoming negatively tilted,
mid-level flow is expected to increase across the area with most
guidance showing bulk shear values from 30-40 knots. East of the
Blue Ridge, there is a stronger signal for increased low-level flow,
with soundings showing 0-3 km shear on the order of 20-30 knots
which bears watching for potential low-level rotation within some
storms. Given the strong forcing and the 30-40 Knots of bulk shear,
any sunshine in the afternoon may provide ample instability on the
order of around 1000-1500 J/kg of MLCAPE to fuel severe
thunderstorms capable of damaging winds, large hail, and even a few
isolated tornadoes possible. We will continue to monitor this system
as it approaches and uncertainty decreases.
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4:45AMer's.  61 and sitting on .8" of gold.  It shut down quickly after I said approaching 1" so not really approached.  That gives us 1.3" in the last 5 weeks and about 4 1/2" over the last 65 days.    Summer deficit at around 4 1/2" and year to date around 11". 

Statewide YTD mean areal smoothed over a bit by rain in N Franklin but still a substantial number over 7.  LSV still in a decent hole.  If this ULL can come close enough to us Sun-Tue it may cut into this greatly. 

image.png.523473468f31875053361b7795cff1a5.png

 

 

image.png.869d160e689af8fbbef74ad70272bca5.png

 

 

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1 hour ago, Bubbler86 said:

4:45AMer's.  61 and sitting on .8" of gold.  It shut down quickly after I said approaching 1" so not really approached.  That gives us 1.3" in the last 5 weeks and about 4 1/2" over the last 70 days.    Summer deficit at around 4 1/2" and year to date around 11". 

Statewide YTD mean areal smoothed over a bit by rain in N Franklin but still a substantial number over 7.  LSV still in a decent hole.  If this ULL can come close enough to us Sun-Tue it may cut into this greatly. 

image.png.523473468f31875053361b7795cff1a5.png

 

 

image.png.869d160e689af8fbbef74ad70272bca5.png

 

 

Where I'm at I'm in pretty good shape. But the creek is starting to get low again (but not as low as its been) but thats  typical for the summer season

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8 minutes ago, mahantango#1 said:

Where I'm at I'm in pretty good shape. But the creek is starting to get low again (but not as low as its been) but thats  typical for the summer season

Most models suggest a FFW will be needed somewhere in the next two days.  Rgem shows 1-2" before dark tomorrow along the M/D line....GFS kicks the Pillow/Tamaqua split in the splits to come up with this by later Monday.  GFS shows 1/2-1" over you before dark tomorrow but that is a convection bullseye. 

image.thumb.png.d6b377df3c0790040359cbe9b14cca02.png

 

 

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How chilly has it been? Well 19 of the last 22 days have featured below average temperatures here in Western Chester County. This weekend we should see temps averaging close to normal. Shower chances increase Sunday night through early Tuesday but most days except Monday this week should feature plenty of sunshine.
Records for today: High 99 (1930) / Low 45 (1951) / Rain 1.41" (1987)
image.png.3e5ef4e10eb20ce001dadbc9bd6a2992.png
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I don't know if it means anything, but this morning and still continuing this afternoon. There are a lot of  ants moving their eggs out of a flowerbed that sits in a lower location to a new location that is about 5ft. Higher about 70ft. away from the original location. So I Googled this. It says they could be moving to avoid heavy rain. I never noticed this before. So I checked my NWS forecast. It says by Tuesday eve I could see 3in. Of rain by then. So maybe the ants are expecting more than that. I guess we'll see what happens till then.

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