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March 2021 Weather Discussion


CoastalWx
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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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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

. Depends upon direction of travel.  North - wet, East - OTS.  NE - go to next page.

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10 minutes ago, tamarack said:

Finally seeing the sun trying to burn thru.  Mid 50s here and 72 at BML, less than 60 miles away.

We labored 'till 18z ... but it was 49 and light lab-fridge urine here at 13Z with slate ... handling memories of 76 F and sun forecast aft by only 12 hours. Jeez.

But, here we are ..open sky hot sun and 71 big ones.   DP is 61, too - heh... forgot to consider that.

It's a whole 'nother world compared to those 70/20 days...  Putting up 71/61 is a strange feel with no foliage and the ground still beige.   And with Sept 15 equivalent late summer sun ...we probably won't max until 4:30 either.

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19 minutes ago, Damage In Tolland said:

Lol

 

Not to defend the euro, but..

1. That’s a weenie clown map not produced by the actual model so it comes down to the vendor’s algorithm.

2. It’s a day 8 map. So comparing a d8 op run to the NAM is a little laughable.

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6 minutes ago, dendrite said:

Not to defend the euro, but..

1. That’s a weenie clown map not produced by the actual model so it comes down to the vendor’s algorithm.

2. It’s a day 8 map. So comparing a d8 op run to the NAM is a little laughable.


Thought the exact same thing....why do we care if the model is drastically changing at day 7-8 down to day 3-4? That is actually to be expected.

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14 minutes ago, dendrite said:

Not to defend the euro, but..

1. That’s a weenie clown map not produced by the actual model so it comes down to the vendor’s algorithm.

2. It’s a day 8 map. So comparing a d8 op run to the NAM is a little laughable.

The storm is going to develop a little later, but snow maps are horrible and almost always wrong. Upper levels and temp profiles are more important, and the euro had the right idea. I thought we might get an Eastern mass blizzard if the low trended farther south, but that didn’t happen and it looks to stay north. Still a big storm though, You Phineas Powderfreak and Dendy are probably getting 1-2 feet of snow from this. Down where I live it’s a big ol rainstorm. The euro had CNE/NNE as the jackpot which is better than the garbage gfs that didn’t even transfer the low. 

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It is mind blowing how much dew point and not temperature matters with melting snow.  We melted more snow today than the previous like 3-4 days combined.

Temperatures are within 5-10 degrees but the dews of 17F vs today’s 50F was eye opening. River is steadily rising and upcoming rain plus draining mountain snow melt should fill the channel.

This is a 48 hour change:

8F1C5B73-7938-4FA8-962A-5F4281C71732.jpeg.2da8267b53a798d643069dbb4a55c0b5.jpeg

E79F9251-B53B-41EB-9F30-1A5532355D8B.jpeg.0b996b19be10204357f793b82fa9f079.jpeg

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Everything discussed about that Euro run beyond D ~ 4.5 is not considering it's patently obvious amplification bias it regularly/routinely applies as a systemic wash to everything and all features it already has in process/ physically handling in those extended time ranges ...

I bet anyone 10 bucks that four cycle from now that won't be there - if not the next ... talking about the D7/8 thing -

The only real reason to tweet that and then make fun of it, is because that personal really really hopes it happens.  Lol ...otherwise, that realization of its bias makes it not really commendable enough to comment on

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1 hour ago, PhineasC said:

18z NAM has a bunch of freezing rain and sleet here for the second storm. I hope this verifies a little colder as blue bomb. Not expecting ZR here this late in the season at 31.5 degrees. That's not happening.

We had a nice ZR storm up here in April a few years ago. It can happen with a strong enough ageostrophic flow and a thick enough deck even during the day and a little below freezing. It doesn’t take much insolation to ruin the accretion though. A good SWFE has no problem socking us in to the dark misery though.

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5 minutes ago, powderfreak said:

It is mind blowing how much dew point and not temperature matters with melting snow.  We melted more snow today than the previous like 3-4 days combined.

Temperatures are within 5-10 degrees but the dews of 17F vs today’s 50F was eye opening. River is steadily rising and upcoming rain plus draining mountain snow melt should fill the channel.

This is like a 48 hour change:

8F1C5B73-7938-4FA8-962A-5F4281C71732.jpeg.2da8267b53a798d643069dbb4a55c0b5.jpeg

E79F9251-B53B-41EB-9F30-1A5532355D8B.jpeg.0b996b19be10204357f793b82fa9f079.jpeg

Yeah I posted about that earlier. Huge difference in the melt today with 63/53 and little sun versus 63/13 and all day blues.

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