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1/5-1/6 clipper system


Thundersnow12

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Can probably double that if you a little more.

25:1 seems like a good first guess ratio right now.

I would probably go 20:1 at this point just because 25:1 is pretty exceptional. By the way note which model of the global models is the furthest north on this one just like it had been the furthest east with the current system. I would ride the Euro at this range, and let all the other models waver back and forth.
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I would probably go 20:1 at this point just because 25:1 is pretty exceptional. By the way note which model of the global models is the furthest north on this one just like it had been the furthest east with the current system. I would ride the Euro at this range, and let all the other models waver back and forth.

Don't think that's a fair comparison since these are 2 completely different types of systems. Besides Euro is still playing catch up with this as eveident by the increase in snow amounts with each run. As i said earlier GFS appears to have the best handle on this IMO. It's been basically rock steady for days now.

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If you want to get really picky about it (I wouldn't advise, but it's interesting to look over nonetheless), the energy which will make up our clipper was barely 'sampled', if you really want to call it that.

 

ak_nws_sonde.png

 

Using the UCAR Alaska radiosonde chart, and comparing to 500mb vorticity maps as of 0z tonight, it looks like a lone site on the island just south of the western mainland got a shot to diagnose the system in tonight's balloon launch. Compare for yourself:

 

gfs_z500_vort_ak_1.pngSomething that's always troubled me is the effect, if any, of these early sampling events on the models. Could they predict the eventual track of the storm due to that 'mini-sampling'? Or is it of little to no consequence? This event might be a good test of the theory; we saw guidance generally make a move southward (mainly the GFS duo and Euro) with tonight's 0z runs.

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I would probably go 20:1 at this point just because 25:1 is pretty exceptional. By the way note which model of the global models is the furthest north on this one just like it had been the furthest east with the current system. I would ride the Euro at this range, and let all the other models waver back and forth.

 

The problem is that 'king' didn't even have the storm until a few runs ago.  Now that it does have it, though, maybe we can trust it?

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I like the Nam adjusted south a bit....I think the Nam is too dry on the south end

 

FWIW, 12z NAM did come south slightly, more in line with your thinking. Still showing a sharp cut off along I 70.

 

EDIT: IWX is bullish and spitting out amounts, "...WITH 3 TO 6 INCHES EXPECTED BY MID DAY TUESDAY."

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FWIW, 12z NAM did come south slightly, more in line with your thinking. Still showing a sharp cut off along I 70.

 

EDIT: IWX is bullish and spitting out amounts, "...WITH 3 TO 6 INCHES EXPECTED BY MID DAY TUESDAY."

 

I think that's a fairly good broadbrushed call for their CWA.

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EDIT: IWX is bullish and spitting out amounts, "...WITH 3 TO 6 INCHES EXPECTED BY MID DAY TUESDAY."

 

Seems like a good call right now. IND thinking 1-2" across the northern parts of the CWA. Can't afford any more wiggles north though, IMBY. Hopefully we score a little measurable...

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If you want to get really picky about it (I wouldn't advise, but it's interesting to look over nonetheless), the energy which will make up our clipper was barely 'sampled', if you really want to call it that.

 

ak_nws_sonde.png

Using the UCAR Alaska radiosonde chart, and comparing to 500mb vorticity maps as of 0z tonight, it looks like a lone site on the island just south of the western mainland got a shot to diagnose the system in tonight's balloon launch. Compare for yourself:

 

gfs_z500_vort_ak_1.pngSomething that's always troubled me is the effect, if any, of these early sampling events on the models. Could they predict the eventual track of the storm due to that 'mini-sampling'? Or is it of little to no consequence? This event might be a good test of the theory; we saw guidance generally make a move southward (mainly the GFS duo and Euro) with tonight's 0z runs.

Even one raob can help the models calibrate the strength and position of the wave, so it does help, but it is still early in the clipper's life cycle and it will completely shear apart in the next 54 hours. It would be more beneficial to sample the wave later. On the other hand, no clipper can be adequately sampled by the upper air network, so you pretty much take what you can get at any stage.

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gfs came a little north.   still liking a euro track overall.   I expect the ggem to start caving north in the next couple runs.   This just hasn't had that south trend feeling from the beginning even though southern-trending clippers are common.

 

still think a 1-2" event along i-70, (probably closer to 2 imby)....probably snow advisory  with a row of counties north of that with 3-6" in the northern parts of Ohio.

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