2023 Global Model Runs Discussion (Out thru day 16)

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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#741 Postby toad strangler » Sun Aug 06, 2023 8:14 pm

AtlanticWind wrote:
jlauderdal wrote:
AtlanticWind wrote:We are just 10 to 20 days from Atlantic activity starting up,
The models should start reflecting this pretty soon I expect.
What leads you to believe we get activity in 10 to 20 days?


It’s the time frame an average season ramps up and a season expected to be above normal by the experts
I see this as the most likely scenario.

The models usally began picking up storm formation as we get later in August.


Dr. William M. Gray
8/20 Ding Ding Ding!
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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#742 Postby LarryWx » Sun Aug 06, 2023 9:29 pm

AtlanticWind wrote:
jlauderdal wrote:
AtlanticWind wrote:We are just 10 to 20 days from Atlantic activity starting up,
The models should start reflecting this pretty soon I expect.
What leads you to believe we get activity in 10 to 20 days?


It’s the time frame an average season ramps up and a season expected to be above normal by the experts
I see this as the most likely scenario.

The models usally began picking up storm formation as we get later in August.


They already are. 12Z EPS is pretty busy in the MDR after Aug 15th.
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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#743 Postby Blown Away » Mon Aug 07, 2023 5:52 am

LarryWx wrote:
AtlanticWind wrote:
jlauderdal wrote:What leads you to believe we get activity in 10 to 20 days?


It’s the time frame an average season ramps up and a season expected to be above normal by the experts
I see this as the most likely scenario.

The models usally began picking up storm formation as we get later in August.


They already are. 12Z EPS is pretty busy in the MDR after Aug 15th.


GFS, ECMWF, CMC, GEFS, ECENS pretty quiet through mid August. Still showing a few lows in the Central Atlantic and drying out as they move west. GFS hinting at a weak TS just before CA, but likely an EPAC storm.
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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#744 Postby REDHurricane » Mon Aug 07, 2023 7:51 am

Blown Away wrote:
GFS, ECMWF, CMC, GEFS, ECENS pretty quiet through mid August. Still showing a few lows in the Central Atlantic and drying out as they move west. GFS hinting at a weak TS just before CA, but likely an EPAC storm.


Although none of the models are forecasting any specific TCs through the next two weeks, the signals for favorability do already seem to be in place beginning in about a week:

EPS giving 50-60% chance of MDR TC formation from August 14-21
Image

CFS showing an impulse in/near the MDR from August 13-21
Image

Both EPS and GEFS signaling more abundant moisture throughout the tropical Atlantic from August 13-22
Image
Image

And -- I also posted this in the extended forecast thread -- but the CFS Weekly, as well as EPS/GEFS, are all predicting an anomalously strong Bermuda-Azores high from August 13-20:
Image

Very interesting. I could be wrong here, but it looks like there's probably going to be at least something trying to spin up in the MDR from August 13-21, and anything that does form should likely get pushed west into the Caribbean/Gulf/CONUS due to the strong subtropical ridge. Hopefully we won't see anything stronger than a TD or weak TS of course, but if I lived anywhere near the typical hurricane threat zones right now, I know I would at least start preparing the basic necessities just in case we see any surprises.
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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#745 Postby SFLcane » Mon Aug 07, 2023 8:28 am

REDHurricane wrote:
Blown Away wrote:
GFS, ECMWF, CMC, GEFS, ECENS pretty quiet through mid August. Still showing a few lows in the Central Atlantic and drying out as they move west. GFS hinting at a weak TS just before CA, but likely an EPAC storm.


Although none of the models are forecasting any specific TCs through the next two weeks, the signals for favorability do already seem to be in place beginning in about a week:

EPS giving 50-60% chance of MDR TC formation from August 14-21
https://charts.ecmwf.int/streaming/20230807-0810/17/ps2png-worker-commands-76cd98777c-2x9b8-6fe5cac1a363ec1525f54343b6cc9fd8-ZXmroN.png

CFS showing an impulse in/near the MDR from August 13-21
https://ncics.org/pub/mjo/v2/map/olr.cfs.all.global.7.png

Both EPS and GEFS signaling more abundant moisture throughout the tropical Atlantic from August 13-22
https://media1.giphy.com/media/v1.Y2lkPTc5MGI3NjExaHo2aWwyaGZtYzk3M3prZGFkbGU1OGtldHRnbWF2dmNxeDl4MDdnOSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/pAcnZr1RkZngfoCDqY/giphy.gif
https://media4.giphy.com/media/v1.Y2lkPTc5MGI3NjExc3VsenBvcjB2YmJrdnIxMXh5c2dwcGNpdXNhaWdqOTVnaTh1dzRxeSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/40n4pXjilaNakk9D5f/giphy.gif

And -- I also posted this in the extended forecast thread -- but the CFS Weekly, as well as EPS/GEFS, are all predicting an anomalously strong Bermuda-Azores high from August 13-20:
https://www.tropicaltidbits.com/analysis/models/cfs-avg/2023080618/cfs-avg_mslpaNormMean_atl_2.png

Very interesting. I could be wrong here, but it looks like there's probably going to be at least something trying to spin up in the MDR from August 13-21, and anything that does form should likely get pushed west into the Caribbean/Gulf/CONUS due to the strong subtropical ridge. Hopefully we won't see anything stronger than a TD or weak TS of course, but if I lived anywhere near the typical hurricane threat zones right now, I know I would at least start preparing the basic necessities just in case we see any surprises.


What about the mid-level RH? It's mid level that's bad right now. Look how dry the G-IV sondes were :(

 https://twitter.com/AndyHazelton/status/1688330663403864064


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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#746 Postby REDHurricane » Mon Aug 07, 2023 9:03 am

SFLcane wrote:What about the mid-level RH? It's mid level that's bad right now. Look how dry the G-IV sondes were :(

https://twitter.com/AndyHazelton/status/1688330663403864064?s=20


Yeah, that will be the primary factor keeping the lid on things for at least the next week or so -- just depends on whether these next several tropical waves can erode enough of the SAL to clear the way for the August 14-22 period of apparent favorability. If something does form I'd guess it would probably be closer to the end of this period and, shockingly, everyone's favorite 8/20 milestone :bd:
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#747 Postby SFLcane » Mon Aug 07, 2023 9:10 am

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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#748 Postby NotSparta » Mon Aug 07, 2023 11:25 am

SFLcane wrote:
REDHurricane wrote:
Blown Away wrote:
GFS, ECMWF, CMC, GEFS, ECENS pretty quiet through mid August. Still showing a few lows in the Central Atlantic and drying out as they move west. GFS hinting at a weak TS just before CA, but likely an EPAC storm.


Although none of the models are forecasting any specific TCs through the next two weeks, the signals for favorability do already seem to be in place beginning in about a week:

EPS giving 50-60% chance of MDR TC formation from August 14-21
https://charts.ecmwf.int/streaming/20230807-0810/17/ps2png-worker-commands-76cd98777c-2x9b8-6fe5cac1a363ec1525f54343b6cc9fd8-ZXmroN.png

CFS showing an impulse in/near the MDR from August 13-21
https://ncics.org/pub/mjo/v2/map/olr.cfs.all.global.7.png

Both EPS and GEFS signaling more abundant moisture throughout the tropical Atlantic from August 13-22
https://media1.giphy.com/media/v1.Y2lkPTc5MGI3NjExaHo2aWwyaGZtYzk3M3prZGFkbGU1OGtldHRnbWF2dmNxeDl4MDdnOSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/pAcnZr1RkZngfoCDqY/giphy.gif
https://media4.giphy.com/media/v1.Y2lkPTc5MGI3NjExc3VsenBvcjB2YmJrdnIxMXh5c2dwcGNpdXNhaWdqOTVnaTh1dzRxeSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/40n4pXjilaNakk9D5f/giphy.gif

And -- I also posted this in the extended forecast thread -- but the CFS Weekly, as well as EPS/GEFS, are all predicting an anomalously strong Bermuda-Azores high from August 13-20:
https://www.tropicaltidbits.com/analysis/models/cfs-avg/2023080618/cfs-avg_mslpaNormMean_atl_2.png

Very interesting. I could be wrong here, but it looks like there's probably going to be at least something trying to spin up in the MDR from August 13-21, and anything that does form should likely get pushed west into the Caribbean/Gulf/CONUS due to the strong subtropical ridge. Hopefully we won't see anything stronger than a TD or weak TS of course, but if I lived anywhere near the typical hurricane threat zones right now, I know I would at least start preparing the basic necessities just in case we see any surprises.


What about the mid-level RH? It's mid level that's bad right now. Look how dry the G-IV sondes were :(

https://twitter.com/AndyHazelton/status/1688330663403864064?s=20


Precipitable water is the entire column, which includes mid levels
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#749 Postby gatorcane » Mon Aug 07, 2023 11:58 am

12Z GFS going with more EPAC development instead of BOC

Image
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#750 Postby SFLcane » Mon Aug 07, 2023 12:08 pm

Just a matter of time before reliable models start showing development in my opinion.

Image

Image
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#751 Postby cycloneye » Mon Aug 07, 2023 12:27 pm

SFLcane wrote:Just a matter of time before reliable models start showing development in my opinion.

https://i.postimg.cc/NF6kTG1r/hhh.png

https://i.postimg.cc/k47ZDZrs/icon.png


Also GFS.

Image
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#752 Postby SFLcane » Mon Aug 07, 2023 2:00 pm

cycloneye wrote:
SFLcane wrote:Just a matter of time before reliable models start showing development in my opinion.

https://i.postimg.cc/NF6kTG1r/hhh.png

https://i.postimg.cc/k47ZDZrs/icon.png


Also GFS.

https://i.imgur.com/tIguqtw.png


Like i said its only a matter of time.

Image
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#753 Postby LarryWx » Mon Aug 07, 2023 2:29 pm

The 12Z GEFS, though not extremely active, is somewhat active late in the run off the SE US with four hurricanes out of 31 members. During this time, it has an E US ridge. Considering also the very warm SSTs, that may end up a risky period for the E coast though hopefully not.
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#754 Postby SFLcane » Mon Aug 07, 2023 2:54 pm

Image
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#755 Postby Teban54 » Mon Aug 07, 2023 3:46 pm

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Re: RE: Re: 2023 Global Model Runs Discussion (Out thru day 16)

#756 Postby jlauderdal » Mon Aug 07, 2023 3:53 pm

SFLcane wrote:Image
I say its a false start, this is looking like a season that goes into November. Hurricanes exist to move energy around and there is plenty this year to move.
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#757 Postby Gums » Tue Aug 08, 2023 10:09 am

Salute!

I look for a more active late Aug and Sep...think Ian, Betsy, Katrina, Opal and more....
The Bermuda high seems to be moving northeast, so I stick with mu forecast for more storms hitting east coast versus in the Gulf, and remember Hugo

Gums sends...
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#758 Postby wxman57 » Tue Aug 08, 2023 12:56 pm

Meanwhile, I'm enjoying a nice, quiet Atlantic for the next 10 days or so (at least). Still forecasting for Lan, Khunan, and Dora in the Pacific, so it's not totally quiet for us. I spent 2 hours on the Lan forecast. Another vacation day for me this Friday! Probably next Friday, too. Pulling for zero August storms.
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#759 Postby SFLcane » Tue Aug 08, 2023 1:00 pm

wxman57 wrote:Meanwhile, I'm enjoying a nice, quiet Atlantic for the next 10 days or so (at least). Still forecasting for Lan, Khunan, and Dora in the Pacific, so it's not totally quiet for us. I spent 2 hours on the Lan forecast. Another vacation day for me this Friday! Probably next Friday, too. Pulling for zero August storms.


You might get it if the gfs is right.
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Re: 2023 Global Model Runs Discussion (Out thru day 16)

#760 Postby SFLcane » Tue Aug 08, 2023 1:03 pm

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