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Spring/ Summer 2014 Convection Discussion


weatherwiz

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I actually agree with Wiz. If the NAM is right with this instability push from the south this aftn and evening..the threat does linger into the night with winds backing slightly. I'm kind of intrigued this aftn with this boundary in place as normally things don't fire and move from south to north. It could be a whole lot of nothing so we'll have to wait and see.

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Sort of like the look of the windfields in the soundings... strong unidirectional flow but it's mostly around 260 which should help keep things clear this afternoon, especially early.   To have any chance at a tornado you'd have to think that channeled flow or remnant boundaries will be especially important today, but even a non rotater could produce a heavy gust if it can tap into the jet aloft.

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Hopefully nobody is falsely getting their hopes up.

The bottom line is this:

-there's going to a good amount of severe wx in New England over the next days

-there's going to be at least several low topped spinner's and TOR's

-damaging wet microbursts are the biggest threat

-this is going to be our biggest outbreak of the season

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You can see what I mean at 925mb on the SPC site. I also noted CU field moving SE too at work. Temporary stabilization, but setting up boundary for later on. With another disturbance pushing north, that setups up shwrs/tstms developing later and pushing north. I'm not saying severe galore, but could be interesting setup later on from NYC on northeast through CT and perhaps up into ern MA early evening.

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You can see what I mean at 925mb on the SPC site. I also noted CU field moving SE too at work. Temporary stabilization, but setting up boundary for later on. With another disturbance pushing north, that setups up shwrs/tstms developing later and pushing north. I'm not saying severe galore, but could be interesting setup later on from NYC on northeast through CT and perhaps up into ern MA early evening.

 

Yeah I agree. I think the timing is just a bit late for us in SNE with the best LLJ hanging west until later but interesting for sure around NYC metro and even down toward Philly. 

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Sort of like the look of the windfields in the soundings... strong unidirectional flow but it's mostly around 260 which should help keep things clear this afternoon, especially early.   To have any chance at a tornado you'd have to think that channeled flow or remnant boundaries will be especially important today, but even a non rotater could produce a heavy gust if it can tap into the jet aloft.

 

Yeah decent flow through the column... but also winds the morning are light out of the south here in CT for the most part. Definitely some turning in the 0-1km layer. 

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Yeah I agree. I think the timing is just a bit late for us in SNE with the best LLJ hanging west until later but interesting for sure around NYC metro and even down toward Philly. 

 

Yeah the LLJ is sort of hanging west until later, but maybe that push early evening could help?

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Today actually could turn out partly/mostly sunny until mid afternoon. Dews are modeled to get up into the mid 70's

 

I don't think dews will get overly oppressive until tomorrow. It will be humid, but tomorrow will feel like Haiti. Probably like 70-72 today which is moist enough.

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I don't think dews will get overly oppressive until tomorrow. It will be humid, but tomorrow will feel like Haiti. Probably like 70-72 today which is moist enough.

I know Quincy's feeling was we wouldn't see any sun today..which was why he was down on severe. Obviously the instability won't be an issue today..We'll just have to watch that disturbance you mentioned as it moves NE and see how things unfold

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I know Quincy's feeling was we wouldn't see any sun today..which was why he was down on severe. Obviously the instability won't be an issue today..We'll just have to watch that disturbance you mentioned as it moves NE and see how things unfold

 

Well the sunnier weather is in the more stable region so it's sort of a balance if you know what I mean.

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Of course you should never rip and read those verbatim..but it gives you the idea...even that weenie finger of cells extending into CT. 

 

This is where the instability is right now. Notice all the MUCAPE south of SNE over the waters. This is aloft of course and it's not a coincidence that the lower PWATS over land have more stable air.

 

 

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Healthy looking cu field here after tropical showers this am, actually had one or two solid showers.

Long range out in hrrr but looked stormy on an earlier run in the overnight but was in clown range. I thnk we see line or cells head into nyc, then spread into ct.. severe? No its meh. I bet hartford to Kev sees some nice downpours. Everyone sees solid rain past dark.

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Nam has been bulking that up.. last night it looked more potent.. firehouse lifting northeast inundating the entire eastern half of sne with thunder/lightning wednesday?

 

Well it could be just rain with a few rumbles too. Depends on how slow the front is because the real instability might already be pushing east.

 

BTW,  I'm not making a series of posts today because I think it's going to be a big day or something...it's just that we finally have more widespread wx that isn't just ern NY state.

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Well it could be just rain with a few rumbles too. Depends on how slow the front is because the real instability might already be pushing east.

 

BTW,  I'm not making a series of posts today because I think it's going to be a big day or something...it's just that we finally have more widespread wx that isn't just ern NY state.

 

Models do show some CIN developing after 00z so I think we just miss the juxtaposition of sb convection and strong 0-3km shear. Today, that sets up over NJ and PA. That should mitigate the tornado threat after dark.

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Models do show some CIN developing after 00z so I think we just miss the juxtaposition of sb convection and strong 0-3km shear. Today, that sets up over NJ and PA. That should mitigate the tornado threat after dark.

 

Tomorrow should have the better juxtaposition, especially out your way.

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