2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1801 Postby toad strangler » Mon Jul 20, 2020 11:12 am

Shell Mound wrote:Top six hyperactive Atlantic seasons and earliest formation date* in MDR (satellite era)

2005 – 11 Jul
1995 – 12 Jul
2004 – 3 Aug
2017 – 19 Jun
1961 – 17 Jul
1998 – 27 Jul

*TD or stronger

So only ~17% or one-sixth of these years (2004) comprised an exception. All five others had at least a TD in the MDR prior to August.

If we don’t see at least one TD (preferably TS) in the MDR before August, then the forecasts for a hyperactive year may bust.

The main problem is that SSTs, on average, have been too cool over the past few months for instability to enable TC formation.

Of course, I am referring to SSTs in the MDR.

https://twitter.com/TylerJStanfield/status/1284837592874266624



No way and no how does a bust hinge on one MDR TC before August. :roll:
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1802 Postby Evan_Wilson » Mon Jul 20, 2020 11:13 am


Just out of curiosity, why would there be less curvatures this season? Hopefully that's not the case as that would make for many East Coast landfalls.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1803 Postby cycloneye » Mon Jul 20, 2020 11:15 am

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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1804 Postby Steve » Mon Jul 20, 2020 11:17 am

Evan_Wilson wrote:

Just out of curiosity, why would there be less curvatures this season? Hopefully that's not the case as that would make for many East Coast landfalls.


Stronger Atlantic High Pressure as well as troughs in the west. As they lift out off the US East Coast, high pressure builds in creating northern blocks.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1805 Postby Evan_Wilson » Mon Jul 20, 2020 11:19 am

Steve wrote:
Evan_Wilson wrote:

Just out of curiosity, why would there be less curvatures this season? Hopefully that's not the case as that would make for many East Coast landfalls.


Stronger Atlantic High Pressure as well as troughs in the west. As they lift out off the US East Coast, high pressure builds in creating northern blocks.

Thank you! So you think it'd be possible for this year to feature more landfalling systems, much alike to 2004? Personally I'm a little concerned for North Carolina this year, and obviously the entire East Coast in general.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1806 Postby SFLcane » Mon Jul 20, 2020 11:23 am

Ahead of 2010 now across the main development region. On fire!! Long terms outlook looks very favorable for continued warming.

 https://twitter.com/webberweather/status/1285243641309650945


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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1807 Postby drezee » Mon Jul 20, 2020 11:30 am

Steve wrote:
Evan_Wilson wrote:

Just out of curiosity, why would there be less curvatures this season? Hopefully that's not the case as that would make for many East Coast landfalls.


Stronger Atlantic High Pressure as well as troughs in the west. As they lift out off the US East Coast, high pressure builds in creating northern blocks.

I agree
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1808 Postby NDG » Mon Jul 20, 2020 11:39 am

Shell Mound wrote:Top six hyperactive Atlantic seasons and earliest formation date* in MDR (satellite era)

2005 – 11 Jul
1995 – 12 Jul
2004 – 3 Aug
2017 – 19 Jun
1961 – 17 Jul
1998 – 27 Jul

*TD or stronger

So only ~17% or one-sixth of these years (2004) comprised an exception. All five others had at least a TD in the MDR prior to August.

If we don’t see at least one TD (preferably TS) in the MDR before August, then the forecasts for a hyperactive year may bust.

The main problem is that SSTs, on average, have been too cool over the past few months for instability to enable TC formation.

Of course, I am referring to SSTs in the MDR.

https://twitter.com/TylerJStanfield/status/1284837592874266624


A couple of things:

That the MDR has been too cool over the past few months? Exactly when?

I would also include 1999 to the list, it was very close to 1998's ACE with a total of 5 MHs compared to 1998 which only had 3.
In 1999 it didn't have system form in the MDR until the third week in August.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1809 Postby Steve » Mon Jul 20, 2020 11:58 am

Evan_Wilson wrote:
Steve wrote:
Evan_Wilson wrote:Just out of curiosity, why would there be less curvatures this season? Hopefully that's not the case as that would make for many East Coast landfalls.


Stronger Atlantic High Pressure as well as troughs in the west. As they lift out off the US East Coast, high pressure builds in creating northern blocks.

Thank you! So you think it'd be possible for this year to feature more landfalling systems, much alike to 2004? Personally I'm a little concerned for North Carolina this year, and obviously the entire East Coast in general.


East coast, Gulf Coast and Caribbean are all at increased risk the way I see it. So far it’s just been weaker early season stuff. Waves will get stronger in August. And of course once the cold starts coming down, the heat looks to come up to balance things out.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1810 Postby drezee » Mon Jul 20, 2020 12:18 pm

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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1811 Postby SFLcane » Mon Jul 20, 2020 1:33 pm

Potential sign this dry sinking airmass will be going away. Lots of blue " lowering of pressures in the MDR " on the EURO.

Image
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1812 Postby FireRat » Mon Jul 20, 2020 2:16 pm

Invest 99L could, possibly could, be the July MDR system we've all been waiting for, even if it's weak. Might develop into something over the next 5 days. Time will tell...
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1813 Postby toad strangler » Mon Jul 20, 2020 2:23 pm

SFLcane wrote:Potential sign this dry sinking airmass will be going away. Lots of blue " lowering of pressures in the MDR " on the EURO.

https://i.imgur.com/rdgnHZ7.gif



Your posts seem to have a certain Andy Hazelton flavor to them :D
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1814 Postby SFLcane » Mon Jul 20, 2020 3:40 pm

As active as i have seen the EPS this season. :eek:

Image
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1815 Postby 869MB » Mon Jul 20, 2020 3:47 pm

SFLcane wrote:As active as i have seen the EPS this season. :eek:

https://i.imgur.com/FQxJKkL.gif


And keep in mind this run was initiated in the middle of July - Just food for thought.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1816 Postby abajan » Mon Jul 20, 2020 4:09 pm

Here's Mark Sudduth's take.
(For those who may not know, he's a fellow S2Ker! :P )
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1817 Postby St0rmTh0r » Mon Jul 20, 2020 4:17 pm

869MB wrote:
SFLcane wrote:As active as i have seen the EPS this season. :eek:

https://i.imgur.com/FQxJKkL.gif


And keep in mind this run was initiated in the middle of July - Just food for thought.

I've seen a lot of weather people saying there won't be a hyperactive season because there has been no MDR storm develop yet but those that have been paying attention see how strong the waves have been and the activity is picking up. August could be pretty crazy if this keeps up
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1818 Postby TheStormExpert » Mon Jul 20, 2020 4:19 pm

[Tweet][/Tweet]
869MB wrote:
SFLcane wrote:As active as i have seen the EPS this season. :eek:

https://i.imgur.com/FQxJKkL.gif


And keep in mind this run was initiated in the middle of July - Just food for thought.

It was initiated today July 20th?
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1819 Postby AutoPenalti » Mon Jul 20, 2020 4:21 pm

SFLcane wrote:As active as i have seen the EPS this season. :eek:

https://i.imgur.com/FQxJKkL.gif

It’s trying, that’s the sign.
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Re: 2020 Indicators: SST's / SAL / MSLP / Steering / Shear / Instability / Sat Images

#1820 Postby TheStormExpert » Mon Jul 20, 2020 4:22 pm

SFLcane wrote:As active as i have seen the EPS this season. :eek:

https://i.imgur.com/FQxJKkL.gif

Yes definitely the most active yet. But it also shows a much more active signal in the East Pacific, whether that actually comes to fruition is yet to be seen, but with the way this season has been playing out over there I have high doubts.
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