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Light thundershower threat - week ending July 28th.


free_man

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Agreed.

Our best shot is if the front can slow down enough to where it comes through late afternoon. Atmosphere really dries out though early Tuesday AM.

Yeah slowing the whole thing down is key. 6 hours is all we need. At this point SNE can maybe salvage and early show for EWB, PVD, UUU, PYM on Tuesday?

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synoptic rain sounds good to me.

I don't really see a good synoptic rain event, unfortunately. The Euro looks a little funny. Most models have a more typical fropa Saturday.

This time of year it's tough to get a good synoptic rain event... a lot of times the models have trouble handling convection and wind up taking a MCS and developing it into a synoptic scale system. More times than not these don't come to pass.

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Storms Monday afternoon look good. Then the front slows on Tuesday like always happens as we get closer and Tuesday is our severe day. That's how I see things playing out

Eh, I think we're sort of toast on Tuesday. Normally, yeah, the fronts tend to slow down a bit during the day as they approach the coastal plain. The difference in this case the front is being pushed along at a good clip by the 500 mb shortwave rotating around the big Quebec closed low. That means that it's going to be tough to slow anything down unless the whole s/w slows down. A bit atypical for July.

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I don't really see a good synoptic rain event, unfortunately. The Euro looks a little funny. Most models have a more typical fropa Saturday.

This time of year it's tough to get a good synoptic rain event... a lot of times the models have trouble handling convection and wind up taking a MCS and developing it into a synoptic scale system. More times than not these don't come to pass.

Yea just wishing, yesterday was good though.

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Eh, I think we're sort of toast on Tuesday. Normally, yeah, the fronts tend to slow down a bit during the day as they approach the coastal plain. The difference in this case the front is being pushed along at a good clip by the 500 mb shortwave rotating around the big Quebec closed low. That means that it's going to be tough to slow anything down unless the whole s/w slows down. A bit atypical for July.

Didn't the front on Wednesday slow down? i remember it was progged a couple days in advance to be early and you and Scooter were kind of worried and then as we got closer it slowed.

As long as that bermuda high is there,,it's got a good shot at slowing

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Yea just wishing, yesterday was good though.

It was. A classic weak little wave producing enough warm advection to get things going.

We'll see how later this week evolves... a lot of moving pieces. This time of year the boring synoptic setup usually wins but we'll see.

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Yeah slowing the whole thing down is key. 6 hours is all we need. At this point SNE can maybe salvage and early show for EWB, PVD, UUU, PYM on Tuesday?

6 hours is easily doable at this range and I could see the front slowing down somewhat as we get closer.

If we can get everything to slow down Tuesday has potential to be a fairly significant day. In order for this to happen though everything will have to go right. The early morning is going to have strong llvl winds in place but as that feature slides east the best shear here slides off the coast.

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Didn't the front on Wednesday slow down? i remember it was progged a couple days in advance to be early and you and Scooter were kind of worried and then as we got closer it slowed.

As long as that bermuda high is there,,it's got a good shot at slowing

The Wednesday thing was pretty much AWT. We knew it was going to be a close call and that north of the Pike would be in trouble... but pretty much things panned out as the models had showed. Timing was pretty good.

The Bermuda high is quite meh actually. The pattern around here is being driven by the closed lows that keep springing up north of the border. The ridge is having trouble nosing in here.

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6 hours is easily doable at this range and I could see the front slowing down somewhat as we get closer.

If we can get everything to slow down Tuesday has potential to be a fairly significant day. In order for this to happen though everything will have to go right. The early morning is going to have strong llvl winds in place but as that feature slides east the best shear here slides off the coast.

Agreed. A 12z-15z fropa is not good. The whole system needs to back up and slow down. Unfortunately the models have been speeding up the fropa. 18z NAM has it around 12z with freshening northwesterlies. Would be a hot (but dry) day.

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The Wednesday thing was pretty much AWT. We knew it was going to be a close call and that north of the Pike would be in trouble... but pretty much things panned out as the models had showed. Timing was pretty good.

The Bermuda high is quite meh actually. The pattern around here is being driven by the closed lows that keep springing up north of the border. The ridge is having trouble nosing in here.

But my point is as long as it's there..it always slows these things up

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Agreed. A 12z-15z fropa is not good. The whole system needs to back up and slow down. Unfortunately the models have been speeding up the fropa. 18z NAM has it around 12z with freshening northwesterlies. Would be a hot (but dry) day.

I'm not really sure if the front will really slow down that much either. Doesn't look to be anything major that would allow for the s/w to slow down, unless perhaps the s/w trough digs a little deeper allowing for stronger ridging out ahead of it. Right now I would target eastern SNE as having the best potential unless things change/

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I'm not really sure if the front will really slow down that much either. Doesn't look to be anything major that would allow for the s/w to slow down, unless perhaps the s/w trough digs a little deeper allowing for stronger ridging out ahead of it. Right now I would target eastern SNE as having the best potential unless things change/

If anything the s/w is speeding up... and there's no reason why it won't continue to speed up.

I think Monday will be a more active day although I doubt anything severe.

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If anything the s/w is speeding up... and there's no reason why it won't continue to speed up.

I think Monday will be a more active day although I doubt anything severe.

Yeah I think Monday will feature lots of storms but with lack of shear it will be really difficult for storms to generate long sustaining updrafts. I agree with what Kevin said to where storms will be pulsers with some isolated microbursts.

Flash flooding could actually be the biggest threat here given storms should be rather slow moving and if we end up with any boundaries we could see storms fire and train along this.

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Models are making Monday look a little intriguing. Both the GFS and NAM bring in some steep mid level lapse rates (~7.5C/km) during the afternoon. Pretty impressive!

Mid level flow is pretty meh though on both the GFS and NAM. That said, the 18z NAM keeps lower tropospheric winds strong (thanks to develop LLJ) enough that we have some pretty impressive 0-3km hodographs. Even with 500mb flow <30 knots the directional shear on the NAM results in deep layer shear around 30 knots.

Something to keep our eyes on.

post-40-0-40146600-1342919647_thumb.png

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