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Stuffing and Snow - Late November Banter and Obs


HoarfrostHubb

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Whoomp...dere it is... I also had frost on my car in the lot at 8:20... First time this year (usually in a garage)

I should of taken a oic yesterday morning here, It was around noon time and i have 59 arborvitaes, On about 30 of them where the shadow of the trees were there was frost as long as the trees were high and where the sun was able to shine between them there was none it was kind of cool looking at the angle in which the shadows were cast

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Yeah the ocean is still quite warm relative to an air mass like that. The 850mb temperature dips below -10C , making the SST to LCL delta-T rather extreme, so streets will develop fairly close to shore... If the wind trajectory can back into a 350 type direction as opposed to all the way around to 290, you have a decent shot at being clipped on the outer cape by a band. In fact, looking at the QPF on the 18z GFS, it's printing out measurable in orientation down there.

18z GFS shows a very interesting scenario. 00z NAM is also showing this as well, with a secondary shortwave vort max diving on the backside of the trough that enters the OH Valley and Northeast. The vort max digs into the OH Valley and comes to our south, producing a surface low that quickly develops and gives the Cape and Islands some snow. 00z NAM shows this vort max diving into the trough at hour 84.

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I should of taken a oic yesterday morning here, It was around noon time and i have 59 arborvitaes, On about 30 of them where the shadow of the trees were there was frost as long as the trees were high and where the sun was able to shine between them there was none it was kind of cool looking at the angle in which the shadows were cast

I love little effects like that. There are rocks that hold frost on their north sides near where I used to take my dog for a walk. I should go there tomorrow AM in tribute...

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00z GFS continues with the developing secondary wave of low pressure over the region. It still doesn't have it digging far enough south to impact SNE especially Cape Cod, MA with any snowfall. Its minimal at best. Ridging isn't the problem, the vort max associated with the trough doesn't dig far enough south, before lifting off to the northeast. Its a 984mb low in Nova Scotia.

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00z GFS doesn't quite have the handle on the low pressure that develops along the arctic frontal boundary. I think it develops further south. We will see with future runs, but its in the day 4-5 range now, so its becoming more and more of a sure thing. If we could only get a more concentrated area of vorticity to get the H5 low to close off over our region instead of the Maritimes. Cape Cod, MA could see some snow if future runs back this precip into our region. the .10" QPF line is just to our east and the .25-.5" QPF is far enough offshore not to impact us right now, but future runs might bring more precip, especially with the 700mb core coming right on top of the region. Have to watch all models with this one. Does anyone else have a problem with the GGEM updating? My site is slow.

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No clue how I realized this, and I might be wrong but I am shocked how closely the modeled pattern on the GFS resembles the Nov 28-29 pattern of 1995. Check this out! It's not close to PERFECT, but really close.

Here is Nov 28 1995

post-8091-0-81940400-1353388378_thumb.gi

Now compare that to tonights 00z GFS @ 177 HRS

post-8091-0-24083800-1353388393_thumb.gi

So I went back even further and noticed Nov 26 1995 matched the 00z GFS @ 144HRS

post-8091-0-43606800-1353388397_thumb.gi

post-8091-0-60526500-1353388401_thumb.gi

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