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1/25-1/26 Snow Threat


DDweatherman

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This sort of clipper -- considering the strength/amplitude of the upper shortwave, is essentially a northern Miller B. We just have to hope the surface low tracks far enough south to lock in the cold air and keep us out of any dry slotting, but not too far south where we get moisture starved. What's interesting about this clipper is that because the upper shortwave is as amplified as progged (taking on a more negative tilt), the models maintain a discernible surface low throughout the process -- i.e. not like you're typical Miller B that weakens over the OH Valley and re-forms along the mid Atlantic coast. That could be key in terms of maintaining the swath of at least moderate CCB precip east of the mountains -- if the surface low can stay to our south (while the 850 mb low remains closed off), we've got ourselves a real good shot here. Areas just north of the 850 mb low would most probably hit the jackpot -- especially if we can get any closure at 700 mb. Tthis would only help to deepen the moist easterly fetch/isentropic lift into a nice compact deformation band/comma head.

Nice post and totally agree. This setup is basically what we root hard for with every clipper but rarely happen with a nice defined slp tracking south and keeping the shield intact.

Still kinda nervous with what happens when the low crosses the mountains and jumps offshore. Still much better than the typical weak undefined low that gets shredded over the mountains.I know folks near the blue ridge and Fred valley hate that scenario.

If the low can stay together with defined circ on this track then a lot of us are in good shape for a fun storm.

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Nice post and totally agree. This setup is basically what we root hard for with every clipper but rarely happen with a nice defined slp tracking south and keeping the shield intact.

Still kinda nervous with what happens when the low crosses the mountains and jumps offshore. Still much better than the typical weak undefined low that gets shredded over the mountains.I know folks near the blue ridge and Fred valley hate that scenario.

If the low can stay together with defined circ on this track then a lot of us are in good shape for a fun storm.

NAM is going to smoke us.  Compare the h5 maps.  

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It hits us dead-one, but it is worrisome that the spatial extent of the snow as depicted on tropical tidbits.com decreases steadily between Minnesota (hour 30) and hour 66.  Doesn't mean the storm is dieing (it is moving into latitudes less friendly to snow) but it does mean the sweet spot is small. 

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Through 00z Tuesday, DC approaching 0.6". Not sure I buy the really long duration event but this would be a 5-6" snowfall, verbatim.  Nice run.

 

yea i think at this point we want to lock this one in.  i'm glad there's a least some precip into southern pa.  allows for some wiggle room, but i don't think we want any further south at this point.

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This is more banter, but I think we all know how this will shake out in the end. The northerners will max, but it's starting to look like a nice 2-5" event area-wide with the chance for some higher amounts. 

 

I don't know.  BWI is doing better than me and so is Columbia.  And it tails off to Philly.  Clippers like DC better than Baltimore so far this year.

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This is more banter, but I think we all know how this will shake out in the end. The northerners will max, but it's starting to look like a nice 2-5" event area-wide with the chance for some higher amounts. 

 

Could easily happen but we're kinda close and the jackpot seems to favor dca south where we stand right now. The trend for the last 2 days has been to dig more. A reversal is becoming less likely with each suite. 

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