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Tulip Trouncer Threat III - April Fool's Joke


Baroclinic Zone

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Dylan Drier's blog on WHDH from 6AM:

Amount of precip: A lot of water...1-2" of water likely

Precip Type: Ahh...there's the rub. A storm crossing SE of Nantucket would give us 6-12" of snow (about 8" in Boston) and that would be a heavy, wet snow that sticks to trees and power lines and with gusty winds, power outages would be likely. A storm crossing through CT would produce 1-2" of heavy rain and winds would still be gusty, but power outages would not be as likely. As of right now I think we'll see rain showers late Thursday into Thursday night. Heavy rain is possible in most areas early Friday morning. Then as colder air works in and winds gust out of the NW, rain should change to snow through the morning. This obviously would cut back on accumulations, but even 3-6" of heavy, wet snow could create damage. Higher elevations, closer to the colder part of the atmosphere, have the best chance of seeing more snow than rain and accumulations could be higher than 6". Heavy downpours of snow (thundersnow if it develops) will be the wrench in the forecast because if that develops, it pulls down the colder air from the higher levels of the atmosphere, and more towns (even lower elevations) would see accumulating snow. Precipitation should lighten up significantly after 2pm Friday. We'll see increasing sunshine over the weekend.Please know that I'm giving you my best forecast based on the information as I see it now and based on the trend in the data. A new model comes out every 6 hours, so I'm anxiously waiting for them to be able to provide updates. Trust me...it's my Friday too so I wanna know what the heck is going on :)

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Dylan Drier's blog on WHDH from 6AM:

Amount of precip: A lot of water...1-2" of water likely

Precip Type: Ahh...there's the rub. A storm crossing SE of Nantucket would give us 6-12" of snow (about 8" in Boston) and that would be a heavy, wet snow that sticks to trees and power lines and with gusty winds, power outages would be likely. A storm crossing through CT would produce 1-2" of heavy rain and winds would still be gusty, but power outages would not be as likely. As of right now I think we'll see rain showers late Thursday into Thursday night. Heavy rain is possible in most areas early Friday morning. Then as colder air works in and winds gust out of the NW, rain should change to snow through the morning. This obviously would cut back on accumulations, but even 3-6" of heavy, wet snow could create damage. Higher elevations, closer to the colder part of the atmosphere, have the best chance of seeing more snow than rain and accumulations could be higher than 6". Heavy downpours of snow (thundersnow if it develops) will be the wrench in the forecast because if that develops, it pulls down the colder air from the higher levels of the atmosphere, and more towns (even lower elevations) would see accumulating snow. Precipitation should lighten up significantly after 2pm Friday. We'll see increasing sunshine over the weekend.Please know that I'm giving you my best forecast based on the information as I see it now and based on the trend in the data. A new model comes out every 6 hours, so I'm anxiously waiting for them to be able to provide updates. Trust me...it's my Friday too so I wanna know what the heck is going on :)

Dylan "The GFS" Drier

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Dylan Drier's blog on WHDH from 6AM:

Amount of precip: A lot of water...1-2" of water likely

Precip Type: Ahh...there's the rub. A storm crossing SE of Nantucket would give us 6-12" of snow (about 8" in Boston) and that would be a heavy, wet snow that sticks to trees and power lines and with gusty winds, power outages would be likely. A storm crossing through CT would produce 1-2" of heavy rain and winds would still be gusty, but power outages would not be as likely. As of right now I think we'll see rain showers late Thursday into Thursday night. Heavy rain is possible in most areas early Friday morning. Then as colder air works in and winds gust out of the NW, rain should change to snow through the morning. This obviously would cut back on accumulations, but even 3-6" of heavy, wet snow could create damage. Higher elevations, closer to the colder part of the atmosphere, have the best chance of seeing more snow than rain and accumulations could be higher than 6". Heavy downpours of snow (thundersnow if it develops) will be the wrench in the forecast because if that develops, it pulls down the colder air from the higher levels of the atmosphere, and more towns (even lower elevations) would see accumulating snow. Precipitation should lighten up significantly after 2pm Friday. We'll see increasing sunshine over the weekend.Please know that I'm giving you my best forecast based on the information as I see it now and based on the trend in the data. A new model comes out every 6 hours, so I'm anxiously waiting for them to be able to provide updates. Trust me...it's my Friday too so I wanna know what the heck is going on :)

Ahhhhhh...as if the seniors at my school need another reason to continue their case of Senioritis. Can't wait for the snow day questions!

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Melissa Mack of WBZ Boston blog:

With that being said, let’s talk about this April Fools Day 2011.

We are watching the newest model runs closely as a coastal low is now being depicted by the 3 most reliable model sources – NAM, GFSx, and the EURO.

However, it’s the track of the storm that is becoming very tricky. The NAM shows the coldest (farthest east) solution while the EURO has the surface low passing across eastern Mass and the GFSx has the warmest solution with the vortex of the low passing through central Mass.

If we take a model blend, it would turn out as a rain/snow mix for southeastern Mass/Cape/Islands… mix and snow for the North Shore through Boston down to Worcester… and an all-snow event for areas north and west of 495.

There are QPF amounts of 1-2″ amongst the models which could mean a 6-12″ snow event (~ 10:1 ratio) for areas that maintain all snow.

As you know, we are still 36-48 hours out from this storm which is plenty of time for models to fluctuate.

However, it’s important to be prepared for a nor’easter. Winds will gust from 25-50 mph from the northeast as well.

As we say for many winter storms, ‘nowcasting’ is going to be key for this storm that departs quickly Friday evening/night.

Stay tuned!

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WCVBs Mike Wankum (I think):

However, a second storm will form along The Carolina Coast and that one is not likely to miss us.

It will come much closer to us, causing precipitation to overspread our area later Thursday or Thursday Night.

Right now, it looks like a close call between heavy, wet snow and heavy rain.

As of now, I would say the very best chance for a significant amount of heavy, wet snow (6-12"+) would be across The Berkshires, The Monadnock Region of N.H. (in fact all of Vt., most of N.H and much of Maine will likely get a very heavy, wet snowstorm), and the higher elevations of Worcester County. The risk of power outages in those areas will be high.

But, closer to Boston, heavy, wet snow or a mix of heavy wet, snow and rain MAY change to rain (not certain at this time) sometime during Thursday Night, limiting accumulations some. South and East of I 95 has a somewhat stronger chance of a change to rain and Cape Cod should get mainly rain.

Winds will also become strong from the E-NE along the coast late Thursday and Thursday Night.

Precipitation will come to an end sometime during the day on Friday or Friday evening at the latest.

Skies will partially clear over the weekend, but it will be windy and chilly Saturday (41-49) and somewhat sunnier, breezy and a bit milder Sunday (48-56).

THE TRACK OF THE STORM WILL BE CRITICAL IN DETERMINING THE RAIN/SNOW LINE, so please follow our updates, as this is subject to change.

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If the NAM comes in looking like the GFS, then I'd be concerned.

Absolutely no way that happens... it would at least do it gradually over time.

I think the 00z EURO is a good compromise... track over the Canal would probably bring snows to a very widespread spatial area of New England. With a track like that, at least 80% of New England gets significant snow.

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Eh, the theme over night that is leaping out to me is that this is a weaker system over all, and one that is running up into an April sun neutralized thermal field. Cold rain. Still time - and of course dynamic cooling wouldn't necessarily be the best modeled behavior.

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Eh, the theme over night that is leaping out to me is that this is a weaker system over all, and one that is running up into an April sun neutralized thermal field. Cold rain. Still time - and of course dynamic cooling wouldn't necessarily be the best modeled behavior.

I have my toaster ready...

Still an issue at 1000 feet?

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Eh, the theme over night that is leaping out to me is that this is a weaker system over all, and one that is running up into an April sun neutralized thermal field. Cold rain. Still time - and of course dynamic cooling wouldn't necessarily be the best modeled behavior.

John, I hear prozac is pretty good at stabilizing emotional fields.

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ALY snowfall map on their web page nails the Berks hardest and over a foot for Pete. Has 10" in my area.....

If your area gets 10" out just west of ALB, the coastal plain will likely have trouble.

Given that none of the meso-scale models look anything like the Globals, something has to give. All meso-scale models are still a big hit for the coastal plain and adjacent hills, but as you head into the deeper interior, some of the Globals are a better hit.

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