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January 25-26, 2023 | Winter Storm


Penn State

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Time to nitpick model's vs real-time yet? lol

 

21z

What do you think, 18z NAM 12k and 3k maybe a touch too strong on the southern low... not too bad on the High in PA, and the low in the Dakotas. 3k might be slightly (I mean SLIGHTLY) too strong on the High, but that's being extra critical.

 

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NAM3 sounding for my area. Pretty worried about power outages.  That nearly isothermal later is 2 miles deep, wicked paste bomb.

  Just a refresher, or to help out any new folks, dendrites grow best at about -12°C to -18°, this range  is known as the DGZ (dendritic growth zone), but they also like to grow just below 0° C.  But air at just under 0° holds roughly twice the water content as the DGZ.

 Now, one wouldn't be getting great ratios (unless your surface temps are colder, like 28° I'd say,/) but it can really come down, and stick if there's any slim layer of above freezing air in there.

1309327647_download(18).thumb.png.72295e1a741f0571e1738572e294a951.png

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1 hour ago, MaineJay said:

NAM3 sounding for my area. Pretty worried about power outages.  That nearly isothermal later is 2 miles deep, wicked paste bomb.

  Just a refresher, or to help out any new folks, dendrites grow best at about -12°C to -18°, this range  is known as the DGZ (dendritic growth zone), but they also like to grow just below 0° C.  But air at just under 0° holds roughly twice the water content as the DGZ.

 Now, one wouldn't be getting great ratios (unless your surface temps are colder, like 28° I'd say,/) but it can really come down, and stick if there's any slim layer of above freezing air in there.

1309327647_download(18).thumb.png.72295e1a741f0571e1738572e294a951.png

Oof. Generator time...

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8 minutes ago, Uscg Ast said:

Oof. Generator time...

It's gassed up just in case. At least the inversion should mostly hold and keep the winds down.  We did have enough sun and warmth to clear off a lot of trees. My area didn't get sticky snow with the last storm in but not far away, it was a  pasty.  This is from about 10 miles south of me this morning.

PXL_20230124_140346530.thumb.jpg.56dd28c79d594f467eedd9b59316454a.jpg

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Another step down with the SREF - some day when I'm cleaning files on the computer I'll wonder why I even clipped any of this stuff for an inch storm.  CT news was hyping, but no one was in the grocery store (I needed coffee, broccoli and Magnum bars)

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2 minutes ago, StretchCT said:

Euro trend.  Seriously, what's the ratio of storms that come further north/west to storms that fade out to sea at this point? Gotta be 10:1

trend-ecmwf_full-2023012418-f042.sn10_acc-imp.us_state_ne_s.gif.3ca65442509eb5d2a16a02e0874b3a0d.gif

It's weird, every storm has trended colder for me. Now, part of that is the models do not resolve the CAD up here. I think what's happening is that models are phasing storms favorably in the long range, they start out further east and run more south to north, Thus giving the majority in the region a snowy solution.

  What happens though, is the phasing backs off as we get to reality, this now weaker, and flatter storm path now starts more northerly, and draws up the warmth. It also doesn't have that cold injection from the phase.  The flatter trajectory gets it to the coast, but it really only helps Maine and northern NH.

  I'll try an illustration. The blue path is the long range, the red part is what ends up happening.

Screenshot_20230124-210943.thumb.png.0004ec740a0c3a2ce698b91960b6e8c7.png

 

 

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6 minutes ago, StretchCT said:

More flooding

1160502128_floodadvisory.thumb.jpeg.f86b6fbeb269d2e9920425ca96d5beab.jpeg

 

The moon has an 18.6 year cycle, so there's basically one decade where the moon angle is higher in relation to the sun-earth plane, then one decade where the angle is lower. This lower angle increases the tides, this lower angle regime is the part of the cycle we entered recently.

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4 minutes ago, MaineJay said:

The blue path is the long range, the red part is what ends up happening

Yeah I see what you mean. I wish I kept track of these things rather than rely on memories that may not exist.  BTW, the trend N/W sometimes helps me too, it's not always a shift to rain. 

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