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Tropical 2020 Atlantic Hurricane Season Discussion

Yep this one is coming I think the last big hurrah for the USA...could be a major hit for Florida
 
That escalated quickly. So the 18z GFS has the first storm interacting with front in a manner that would impact South Florida with some convective bands within 4 days? Thanks 2020.
 
00z GFS Para.....lord a moses......6 lows moving around. Nothing really substantial (except for 1 that dies off) with any of them but something for everyone throughout the gulf and eastern coastline to watch.

It reminds me of the finale of a fireworks show.
 
Nothing excites me with the tropics, gulf is destroying it all
 
Whereas the 0Z EPS had only ~7 sub 1000 mb Gulf storms from the two waves, the 12Z EPS has ~13 (25%) sub 1000 mb storms. Most of the geneses are by 10/8. 3 sub 1000 hit LA and 5 sub 1000 hit the area from the FL Panhandle to Big Bend making that area the highest risk on this run. Climo suggests 2 areas at highest risk of landfall from storms that form in the W Caribbean or Gulf in early Oct: S FL and the Gulf coast from LA east to the FL Big Bend. This run is suggesting the Gulf coast area may be at highest risk this year, but that’s just speculation based on this run.

However, though just speculation, the 12Z GEFS sort of agrees regarding sub 1000 mb landfalls from its 31 members with 2 TX, 7 LA to FL Big Bend, and 2 SW FL.

The importance of these runs is that this implies a not so small chance that there will be a N Gulf coast landfall that will subsequently significantly affect many of the well inland active members here at some point, most likely within or near 10/10-14. If anyone here is planning on outdoor activities around 10/10-14, you probably should monitor the tropics extra carefully. To add to this, history shows that in or near that period has had many times when the SE had significant inland effects from earlier Gulf landfalls.

Members in well inland places like Birmingham, Atlanta, Columbia, the Gainesvilles, and Raleigh among others would be well advised to monitor the tropics for potential significant effects from an earlier Gulf coast landfalling TC. It isn’t just the coasts that could be significantly affected.
 
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12z GEFS: area most at risk from TS+ from SE LA to Sarasota with 6 hits in there 10/8-12 from whatever systems.
 
This isn't from TD 25 but rather is from the followup system now in the Caribbean. it is the CMC so it is just fwiw. But the trend of model consensus has been for the N Gulf to be at highest risk, which would have significant implications for many on here for some point most likely within 10/10-14 as stated yesterday:

1601661434685.png
 
This LLC is clearly open or greatly elongated to the N or NW side as I can see it on Visible Satellite to the NW of the deep convection. I don't think the upper level low is over the storm right now, and the LLC is going to get blasted with greater shear the further west or NW it goes.
 
This isn't from TD 25 but rather is from the followup system now in the Caribbean. it is the CMC so it is just fwiw. But the trend of model consensus has been for the N Gulf to be at highest risk, which would have significant implications for many on here for some point most likely within 10/10-14 as stated yesterday:

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I have to completely agree with the CMC depiction of events, because it's current placement of the ULAC to East of TD25 looks the most correct right now. The GFS has the ULAC over 25, but that just isn't the case anymore.
 
The model consensus is continuing to suggest that the N Gulf coast is at highest risk from a landfall from the follow-up system to TD 25, currently in the E. Caribbean, which would later likely lead to strong effects for many forum members well inland within 10/10-15.

Here are two Gulf SST maps to show how much warmer it was with Michael's approach in 2018 vs now:

October 5, 2018: N Gulf all the way to the coast was 29-30 C (near 29C at the coast) or near an early Oct. record of ~85 F thanks to record SE US heat the prior two weeks. Note that SSTs off of SW FL were also near 29-30 C (~85 F):

g8F5GJn.gif


In sharp contrast for the N Gulf, the October 1, 2020 map shows SSTs mainly in the 26-28 C range (near 26 C at the coast) or an average near 81 F meaning ~4 F cooler than it was on Michael's approach. And if anything, they'll likely cool down over the next week due to a cool next few days. So, if there were a H approaching the N Gulf coast in about a week, it would be traveling over much cooler water vs what Michael encountered as it approached the coast. Therefore, whereas there could still be a formidable H hitting the N Gulf coast and it be a big deal there and inland, the chance of it being anything near as strong as the historic Michael is between slim and none.

However, if a H were to approach SW FL south of Ft. Myers, where SSTs are 29-30 C, the fuel would be about the same as that of 2018 and the W Caribbean is actually ~ 2 F warmer at 30-31 C instead of 29-30 C:

JAGqqqh.gif
 
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The 12Z EPS is pretty active and has these 8 sub 1,000 mb CONUS hits out of 51 members with a * indicating H strength:

1. Tampa, FL 10/10
*2. SE LA 10/10
3. SE LA 10/10
4. FL Panhandle 10/12
*5. LA 10/12
*6. LA 10/13
*7. FL Big Bend 10/14
8. Galveston, TX 10/17

XcOjAQ5.png
 
The model consensus is continuing to suggest that the N Gulf coast is at highest risk from a landfall from the follow-up system to TD 25, currently in the E. Caribbean, which would later likely lead to strong effects for many forum members well inland within 10/10-15.

Here are two Gulf SST maps to show how much warmer it was with Michael's approach in 2018 vs now:

October 5, 2018: N Gulf all the way to the coast was 29-30 C (near 29C at the coast) or near an early Oct. record of ~85 F thanks to record SE US heat the prior two weeks. Note that SSTs off of SW FL were also near 29-30 C (~85 F):

g8F5GJn.gif


In sharp contrast for the N Gulf, the October 1, 2020 map shows SSTs mainly in the 26-28 C range (near 26 C at the coast) or an average near 81 F meaning ~4 F cooler than it was on Michael's approach. And if anything, they'll likely cool down over the next week due to a cool next few days. So, if there were a H approaching the N Gulf coast in about a week, it would be traveling over much cooler water vs what Michael encountered as it approached the coast. Therefore, whereas there could still be a formidable H hitting the N Gulf coast and it be a big deal there and inland, the chance of it being anything near as strong as the historic Michael is between slim and none.

However, if a H were to approach SW FL south of Ft. Myers, where SSTs are 29-30 C, the fuel would be about the same as that of 2018 and the W Caribbean is actually ~ 2 F warmer at 30-31 C instead of 29-30 C:

JAGqqqh.gif

Wow the Caribbean is on fire this year and virtually untouched.


Sent from my iPhone using Tapatalk
 
For the E Car wave: About the most ominous run yet of GEFS for CONUS is 18Z with 14 TS+ hits of 31 members with 2 of these appearing to be from a followup:
* = H

*FL Big Bend 10/9
*SE LA 10/9
SE LA 10/10
SE LA 10/10
*AL 10/10
*LA 10/10
*AL 10/11
*FL {Pan} 10/11
FL (TPA) 10/11
MS 10/12
*TX 10/13
TX 10/14

From followup:
*SE FL 10/14
*SE LA 10/15
 
GFS takes the one behind Gamma into Louisiana but is very weak

gfs_mslp_pcpn_watl_30.png

CMC into the Panhandle

gem_mslp_pcpn_watl_29.png

The Euro never gets out of the Southern Gulf it just hangs out there til it dies

ecmwf_z500_mslp_watl_9.png
 
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Here is the 12Z GEFS. Check out the W Caribbean!

1602011361346.png


Look at the progged rainfall from these active members! Arguably, this is as strong a long range signal as any yet from the W Caribbean! So, it looks like we MAY get a 3rd Oct W Car TC. When I get time, I'd like to find the years that had 3+ in Oct.

JpNiJVL.png


Climo would very strongly favor anything developing there that late (10/17-19) to recurve either over or east of FL per this:

Ravm5Ln.png
 
12z Icon and CMC look out to Oct 13/14.....End of run for Icon but CMC strengthens it and takes it northwest.

ScreenshotCapture_2020_10_06_15_13_25_514.jpg

ScreenshotCapture_2020_10_06_15_12_03_084.jpg
 
NHC monitoring a new area of interest in the eastern Atlantic. Correct me if I am wrong, but I don’t think we usually see them this far east this time of year.51D8DE74-6157-4D96-8558-3AE380D18274.jpeg
 
Wonder if it's gonna be another one in the Caribbean
12z Icon places it here on Oct 15.....GFS is in a similar spot at that time too. CMC is riding further north.
Icon and CMC have been giving this signal for a couple days now.

The signal appears to want to pull it north.....so possibly an east coast risk.

ScreenshotCapture_2020_10_08_14_20_03_693.jpg
 
Some development on GFS para (10/20) for storm crossing MDR. Later in the run it pulls northeast. Euro and Icon put an undeveloped wave traveling in the same direction on earlier dates.

ScreenshotCapture_2020_10_09_21_00_52_418.jpg

ScreenshotCapture_2020_10_09_21_02_46_010.jpg

ScreenshotCapture_2020_10_09_21_03_07_816.jpg
 
00z and 06z GFS catching on to the potential of the wave coming across the MDR.

gfs_mslpa_atl_fh306-384.gif
 

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