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May observations and discussions...


ag3

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75 right now after another 43.6F low. Beautiful day number three out there.

I'd say bottle this one up because we don't get these types of days very often, but we've had a ton of nice days since early March. This spring has been pretty spectacular, I must say. We got down closer to normal just in time for normal temps to be very pleasant.

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At this time the Memorial Day Weekend heat potential looks like a heat "delayed but not denied" type of scenario. With the current pattern, it's clear that the core of the ridge and the highest departures will stay west, near the central US, with a trough in SE Canada perhaps resulting in more back door cold front influence around the Memorial Day Weekend time period and going into the following week. Regardless of the core of the heat staying west, in scenarios like the one currently modeled a brief surge of heat is a reasonable possibility ahead of an approaching cold front. The 12z ECMWF for what it's worth shows 2 surges of warmth, one around Saturday and a stronger one towards the middle of the following week (picture below).

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saturday is looking like our first real chance at 90 this year. both the ecmwf and gfs are warm enough at 850mb to support 90 at the sfc

26th and i would bet sunday and perhaps memorial day trend hotter still.

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i love this cycle....beautiful weekends followed by rainy weekdays. mon-thur has the cut off, off the coast, just lingering around as the ridge in the N Atlantic is well entrenched. a "pattern" per say or flow that EC snow lovers would die for in Jan/Feb. prob wont rain every day this week but clouds will be abundant. the cut off then looks to lift out just in time for another great wknd.

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It looks like the east based -NAO pattern will keep the back door cold front close to the Northeast next weekend.

We'll have to see how the models handle the details in order to know what the extent of the warmth will look like.

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It looks like the east based -NAO pattern will keep the back door cold front close to the Northeast next weekend.

We'll have to see how the models handle the details in order to know what the extent of the warmth will look like.

If it wasn't for that strong SE Canadian trough we'd be baking in the 90s for parts of this time period. With that east based -NAO and the possible strong low in SE Canada the back door cold front should play a significant role in the region by limiting the extent of the heat to our south/west and perhaps setting up for some NW flow severe wx event(s). The GFS/DGEX show the potential for thunderstorms, while the CMC suppresses this potential to the south. Regardless of the BDCF there could still be a brief surge of warmth at some point during the weekend ahead of the cold front, although at least with the latest trends a bigger surge of warmth appears somewhat less likely than it did 1-2 days ago.

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If it wasn't for that strong SE Canadian trough we'd be baking in the 90s for parts of this time period. With that east based -NAO and the possible strong low in SE Canada the back door cold front should play a significant role in the region by limiting the extent of the heat to our south/west and perhaps setting up for some NW flow severe wx event(s). The GFS/DGEX show the potential for thunderstorms, while the CMC suppresses this potential to the south. Regardless of the BDCF there could still be a brief surge of warmth at some point during the weekend ahead of the cold front, although at least with the latest trends a bigger surge of warmth appears somewhat less likely than it did 1-2 days ago.

The models really hold the 50/50 in place with a big Canadian High behind it.

It will be really important where the back door actually sets up.

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If it wasn't for that strong SE Canadian trough we'd be baking in the 90s for parts of this time period. With that east based -NAO and the possible strong low in SE Canada the back door cold front should play a significant role in the region by limiting the extent of the heat to our south/west and perhaps setting up for some NW flow severe wx event(s). The GFS/DGEX show the potential for thunderstorms, while the CMC suppresses this potential to the south. Regardless of the BDCF there could still be a brief surge of warmth at some point during the weekend ahead of the cold front, although at least with the latest trends a bigger surge of warmth appears somewhat less likely than it did 1-2 days ago.

commonly known as The Ring Of Fire - fun times ahead if that pans out...........

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If it wasn't for that strong SE Canadian trough we'd be baking in the 90s for parts of this time period. With that east based -NAO and the possible strong low in SE Canada the back door cold front should play a significant role in the region by limiting the extent of the heat to our south/west and perhaps setting up for some NW flow severe wx event(s). The GFS/DGEX show the potential for thunderstorms, while the CMC suppresses this potential to the south. Regardless of the BDCF there could still be a brief surge of warmth at some point during the weekend ahead of the cold front, although at least with the latest trends a bigger surge of warmth appears somewhat less likely than it did 1-2 days ago.

I think it might get hot for a couple of days if the ridge really asserts itself, but the trough over SE Canada is also strong and will keep the backdoor front very close by. The Midwest looks like ground zero for a long duration heat wave. Thunderstorms could certainly be a possibility over top of the ridge as others have been saying.

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It looks like the dry pattern that we had back in April and May might be making a comeback.

It looks like after this weeks rain, we will be back in another dry and very warm pattern.

Per 18z GFS looks like a stormy patteren long range but nothing out of the ordinary. Also this may has not really been all that dry it's been rather active.

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Mt Holly in their disco said models are varying for tomorrow and it may not be an all day washout and the morning might be the best bet for it being dry. Hope to finally get a full week in for once.

Models have on and off rain all week.

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Anyone notice the crazy spread in dewpoints across the metro area? EWR, JFK, and most of Long Island have a dewpoint near 55-57. Meanwhile TEB has a dewpoint of 28, and CDW 30. It's been like that for hours too. EWR and TEB are only 10-15 miles apart, so to have a 29 degree difference in dewpoints is pretty crazy. Just thought that was interesting.

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Anyone notice the crazy spread in dewpoints across the metro area? EWR, JFK, and most of Long Island have a dewpoint near 55-57. Meanwhile TEB has a dewpoint of 28, and CDW 30. It's been like that for hours too. EWR and TEB are only 10-15 miles apart, so to have a 29 degree difference in dewpoints is pretty crazy. Just thought that was interesting.

Yeah I noticed at my station this afternoon some large dewpoint fluctuations in just a short period of time...between 1pm and 5pm the dew point went from 45 down to 33 then back up to 58. The temp during that time ranged from 73 to 69 and I didnt notice any real wind direction changes.

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