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March 2021 Weather Discussion


CoastalWx
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Brightening even here under the butt-bang band of clouds of the I-495's dying deform ...  temp from 52 to 60 in an hour...

It's really warm aloft - folks that get sun going'll probably see some soaring...

Brian I think mentioned 18z for eastern zones...

 

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Thing I'm always wondering about those instability profiles like that -

Aren't those SFC based lifted parcels based upon modeled temperature profiles ??

Those could be wrong if the model's f'ed up -

Like the NAM will have MOS of 67 when 77 .... and throw up 850 elevated convention because it's SBCAPE is a piece of shit... Yet it seems these references to instabilities in tweets and whatever ...it's not clear they are leaving plenty of wiggle room for model temperature bullshit

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the models aren’t showing it right now, but early April needs to be watched for a possible early spring noreaster. The 500 millibar pattern on the european guidance is a bit too progressive right now for a storm, but it has been trending less progressive with more digging of the trough. Looks like NNE after getting skunked most of winter is going to get hammered in early spring, with a foot and possibly more for Phineas Dryslot and Dendy for the 28th storm, then another threat for April 2nd. It also looks like the european guidance is gearing up for yet another early spring snow threat towards the 7-10th timeframe. Climo is extremely unfavorable at this point however there is blocking and a displaced polar vortex in central Canada with ridging out west. Especially for interior CNE/NNE these threats need to be watched, SNE is a long shot due to climo at this point but even here I’m keeping an eye out. The setup looks similar to the 28th so I am leaning more CNE/NNE right now, as it would have to dig a lot more for SNE to be in the game.

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stubborn low cloud...  the orb of the sun is plainly getting through... enough that it's 66 and way above normal but somehow still an injustice - hahahaha.

I guess not advertising 77 with mid summer appeal would help that set up, huh -

But in any case, it is clear like 3 miles west of here out to NYS ... open sky, and the clouds are move WSW to ENE so this is entirely lower level terrain fall away caused at this point... They'll probably make 74 to 76 west of the ORH hills, and then that air mass floods east as late high with a later mix out I'm guessin...

The old 6 pm Logan t-spike ?

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Quite a bit cooler in Hampton today then I was expecting. Still plenty nice enough to fire up the grill later though for the third day in a row! Also wishing for a good outcome for our friends in the south. Birmingham metro is under the gun in a bad way. ~65dbz debris ball on this sucker as well :(

6511D21A-90ED-4D74-9522-8DDD36C6B574.png

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7 minutes ago, Damage In Tolland said:

Glad we live here not there 

oh yeah...it's an eastern zones issue ...

warm fronts creep to the rim of the worcester elevation line and then stops there... You need a p-wave of a f'n comet impact to scour this shit

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1 minute ago, Typhoon Tip said:

oh yeah...it's an eastern zones issue ...

warm fronts creep to the rim of the worcester elevation line and then stops there... You need a p-wave of a f'n comet impact to scour this shit

Good afternoon, Tip. Deep Winter would likely be back in most places after that type of impact. As always .....

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7 minutes ago, rclab said:

Good afternoon, Tip. Deep Winter would likely be back in most places after that type of impact. As always .....

Hopefully readers realize that snark humor -

But, topography does play an important role in timing warm fronts.  They are particularly needful of overcoming low level drag ...and having the land mass fall away/lower elevations peering roughly east of an HFD-EEN line the way it does, tends adds more drag by virtue of more mass ... thus inhibits "light wind field" type warm front erosion scenarios ... front stops at the Worcester Hills.  See it all the time.

It's something also exaggerated in the spring - when of course by nature when no one 'sane' wants it to persist chilly...  We typically are going from very dry DP like yesterday, and then saturation of that air mass, in between, makes the air thermodynamically dense, and offers that much more drag... It's just harder.  

If the TD out ahead of the warm front was warmer than .. 20 F, we probably would have the boundary up there at PWM already

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2 hours ago, PhineasC said:

CMC back to popping a decent secondary low again too. Maybe this will come back for NNE a bit.

Edit: RGEM also looks good, albeit at 84 hours so basically trash. Is a 997 tracking over RI a good snow track here? LOL

All in good fun here, but you’re proving my point! We’re on the same team, let’s get one more snow event before it’s all said and done. Climo is on our side. 

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