ATL: LAURA - Post-Tropical - Discussion

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Hammy
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Re: ATL: LAURA - Tropical Storm - Discussion

#1781 Postby Hammy » Fri Aug 21, 2020 3:59 pm

Kingarabian wrote:
Nuno wrote:
Kingarabian wrote:Significant reduction of airline flights has to be playing a huge role.


I keep seeing this mentioned but it isn't as if planes worldwide are grounded. There are still tons of flights circling around. The lack of GIV flights on the other hand seems to be a major factor.

G-IV are usually flown for threatening systems. Worldwide, even though there is some air travel returning, airline flights have been significantly reduced due to COVID. If it's not that, then maybe satellite assimilation errors? We won't know until after this season is over and the ECMWF/NWS release more information.


I remember seeing some articles about 5G being on the same frequency as weather satellites and possibly interfering with some satellite measurements.

https://www.nature.com/articles/d41586-019-03609-x

Water vapour in the atmosphere naturally produces a weak signal at this frequency, which satellites use to measure humidity. Those data feed into weather forecasts. But if a 5G station is transmitting a signal near the 23.8-gigahertz frequency, a weather satellite might pick it up and interpret it as water vapour.


Though I imagine if that was at play that we'd see the models over-forecasting systems, not failing to pick them up or failing to intensify, but food for thought nonetheless. But on that,

Shell Mound wrote:Based on visible loops, there appear to be two or even three LLCs: one near St. Martin, another east of Antigua, and maybe a third farther ESE.

All three LLCs appear to be part of one sprawling surface trough: essentially eddies within a broader circulation heading generally westward.

https://twitter.com/AnthonyMweather/status/1296907337018609664


If Laura does intensify more, would this explain why the models are having such a difficult time, and could this assist with center reformation should it go over land?
Last edited by Hammy on Fri Aug 21, 2020 4:01 pm, edited 1 time in total.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1782 Postby Aric Dunn » Fri Aug 21, 2020 3:59 pm

Check out the curved inflow into this bad boy... very solid vort max has developed with large tower popping..

this should swing NE with the gyre and could easily become the main center.. also looks like its the start of a big convective burst.

Image
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Re: ATL: LAURA - Tropical Storm - Discussion

#1783 Postby Kingarabian » Fri Aug 21, 2020 4:00 pm

Hammy wrote:
Kingarabian wrote:
Nuno wrote:
I keep seeing this mentioned but it isn't as if planes worldwide are grounded. There are still tons of flights circling around. The lack of GIV flights on the other hand seems to be a major factor.

G-IV are usually flown for threatening systems. Worldwide, even though there is some air travel returning, airline flights have been significantly reduced due to COVID. If it's not that, then maybe satellite assimilation errors? We won't know until after this season is over and the ECMWF/NWS release more information.


I remember seeing some articles about 5G being on the same frequency as weather satellites and possibly interfering with some satellite measurements.

https://www.nature.com/articles/d41586-019-03609-x

Water vapour in the atmosphere naturally produces a weak signal at this frequency, which satellites use to measure humidity. Those data feed into weather forecasts. But if a 5G station is transmitting a signal near the 23.8-gigahertz frequency, a weather satellite might pick it up and interpret it as water vapour.


Though I imagine if that was at play that we'd see the models over-forecasting systems, not failing to pick them up or failing to intensify, but food for thought nonetheless.

Yup. It'll make for some great off season discussion when someone makes a thread for this topic.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1784 Postby knotimpaired » Fri Aug 21, 2020 4:00 pm

USVIKimmie wrote:
Blown Away wrote:IMO the 5pm position will be very close to being centered on St. John’s island. That COC appears to be out running that convection blob to its east.


*pedant* St John, USVI? Is that where you mean? There’s others around... asking for a friend

I’m next door on St Thomas, been blustery, maybe 20-30kts and very little rain. Too soon.


And I am sitting on Vieques waiting to see how this plays out as well.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1785 Postby wjs3 » Fri Aug 21, 2020 4:04 pm

Patrick99 wrote:
eastcoastFL wrote:Currently HWRF has Laura putting key west in the eye as a 943mb storm

https://www.tropicaltidbits.com/analysis/models/hwrf/2020082112/hwrf_ref_13L_28.png


I can’t imagine this playing out currently but who knows at this point

IR

https://www.tropicaltidbits.com/analysis/models/hwrf/2020082112/hwrf_satIR_13L_15.png


Woof. That is a re-run of 1919. 101 years after the fact.


That's the Dry Tortugas--75 miles west of Key West--in the eye there. Not that it's a day at the beach in Key West, but it's also prob not devastation. Fort Jefferson, though...
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Re: ATL: LAURA - Tropical Storm - Discussion

#1786 Postby Hypercane_Kyle » Fri Aug 21, 2020 4:05 pm

Looks like we're back to the ALL CAPS days in the latest NHC discussion.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1787 Postby Evil Jeremy » Fri Aug 21, 2020 4:05 pm

Hypercane_Kyle wrote:Looks like we're back to the ALL CAPS days in the latest NHC discussion.


Pasch is angry.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1788 Postby SFLcane » Fri Aug 21, 2020 4:07 pm

Aric Dunn wrote:Check out the curved inflow into this bad boy... very solid vort max has developed with large tower popping..

this should swing NE with the gyre and could easily become the main center.. also looks like its the start of a big convective burst.

https://i.ibb.co/HdW4G2C/6.gif



Yeah I noticed those CBs.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1789 Postby drewschmaltz » Fri Aug 21, 2020 4:07 pm

Aric Dunn wrote:Check out the curved inflow into this bad boy... very solid vort max has developed with large tower popping..

this should swing NE with the gyre and could easily become the main center.. also looks like its the start of a big convective burst.

https://i.ibb.co/HdW4G2C/6.gif


Correct me if I'm wrong, but you've really learned a lot over the past 5 years. I feel like every season your insight is more and more accurate in its analysis. I want to take a moment to appreciate your posts and say thank you.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1790 Postby hohnywx » Fri Aug 21, 2020 4:08 pm

Hypercane_Kyle wrote:Looks like we're back to the ALL CAPS days in the latest NHC discussion.


I was just thinking that...definitely a throwback. The discussion for 14 is the new standard way.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1791 Postby DestinHurricane » Fri Aug 21, 2020 4:08 pm

Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1792 Postby psyclone » Fri Aug 21, 2020 4:16 pm

DestinHurricane wrote:Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.

The only part of florida that has at least a 30% chance of TS winds is the middle and lower keys. everyone else is much less in the state. that de escalated quickly. 5-10% odds for minimal ts winds along the panhandle beaches in the latest outlook. could always change but the trend is very good for fl...as of now...
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Re: ATL: LAURA - Tropical Storm - Discussion

#1793 Postby Hurricaneman » Fri Aug 21, 2020 4:18 pm

The posts in this forum are NOT official forecasts and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K. For official information, please refer to products from the NHC and NWS.
DestinHurricane wrote:Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.


Don’t discount this system just yet, if this shifts any farther west than the Euro then another analog pops up, the 1900 Galveston hurricane but that’s a remote possibility and a Frederic type system can’t be discounted and the intensity models have Laura near your area so in no way is landfall in your area less likely
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Re: ATL: LAURA - Tropical Storm - Discussion

#1794 Postby drewschmaltz » Fri Aug 21, 2020 4:19 pm

DestinHurricane wrote:Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.


I'm going to go with its way, way to early. And I hate that saying. But just too much can change and its so dynamic with fourteen out there.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1795 Postby Blown Away » Fri Aug 21, 2020 4:19 pm

DestinHurricane wrote:Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.


For sure, not knowing 100% where a center is makes a forecast more uncertain, read the Key Messages in the 5pm Disco... TD13 is very disorganized, the 5pm position of 17.1W/61.2 is @1.5 degrees W of the deep convection. Also TD13 is still >1200 miles from FL and it’s slowing down.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1796 Postby ConvergenceZone » Fri Aug 21, 2020 4:20 pm

:x
psyclone wrote:
DestinHurricane wrote:Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.

The only part of florida that has at least a 30% chance of TS winds is the middle and lower keys. everyone else is much less in the state. that de escalated quickly. 5-10% odds for minimal ts winds along the panhandle beaches in the latest outlook. could always change but the trend is very good for fl...as of now...



I’ll be very happy if this happens, and it can avoid Florida. They got hit so hard with the corona virus, a bad storm is the last thing they need
Last edited by ConvergenceZone on Fri Aug 21, 2020 4:22 pm, edited 1 time in total.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1797 Postby MGC » Fri Aug 21, 2020 4:21 pm

I'm dead center in the landfall cone now....but the is the westward trend finished or is Texas on the table next?.....MGC
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Re: ATL: LAURA - Tropical Storm - Discussion

#1798 Postby rigbyrigz » Fri Aug 21, 2020 4:23 pm

DestinHurricane wrote:Would anyone say a Panhandle landfall is still on the table? Looking a lot less likely to me.


I'm relaxing any prep here in the Big Bend, because what you say seems reasonably likely right now. The GFS and ECMWF have TD14 trending more westward in Day 3-5, which would presumably lessen some interaction (Fujiwara?) that might conceivably push Laura more due north late stage.

That being said, it seems the models and forecasters are having a large amount of uncertainty with TD14 as they are on Laura, so don't plan an outdoor barbecue just yet.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1799 Postby chaser1 » Fri Aug 21, 2020 4:23 pm

Just wanting to keep things positive here. Laura is one impressively vigorous Tropical Wave! I think there's some real potential for development if it can avoid land interaction.
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Re: ATL: LAURA - Tropical Storm - Discussion

#1800 Postby abajan » Fri Aug 21, 2020 4:23 pm

To quote from the 5PM discussion, "... the current intensity is held at 45 knots based on continuity from hurricane hunter observations from earlier today." but the advisory has 45 mph. Which is correct?

Never mind. I see they corrected it.
Last edited by abajan on Fri Aug 21, 2020 4:24 pm, edited 1 time in total.
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