Domain: tiger-web1.srvr.media3.us Hurricane Irma - Spinning Down | Page 24 | O-T Lounge
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re: Hurricane Irma - Spinning Down

Posted on 9/1/17 at 12:53 pm to
Posted by Duke
Dillon, CO
Member since Jan 2008
36491 posts
Posted on 9/1/17 at 12:53 pm to
You guys want to see how much variability is cooked into the models past five or six days? Below is a composite of the 500 mb heights for each GFS ensamble member going out in time.

Posted by rds dc
Member since Jun 2008
21248 posts
Posted on 9/1/17 at 12:57 pm to
HWRF did well with Harvey up until landfall and it has Irma just clipping the Islands. That would be on the SW edge of the 12z GEFS cluster.



Posted by cajunangelle
Member since Oct 2012
163904 posts
Posted on 9/1/17 at 1:00 pm to
So if I lived on the coast of NC should I be watching this?
Posted by Duke
Dillon, CO
Member since Jan 2008
36491 posts
Posted on 9/1/17 at 1:01 pm to
Yeah, I'd be keeping a close eye on it.
Posted by rt3
now in the piney woods of Pineville
Member since Apr 2011
146896 posts
Posted on 9/1/17 at 1:03 pm to
why is the Euro constantly starting the strength run so low... last 2 runs I've noticed 00 hour & 24 hour have the storm's strength at 1010mb+ and obviously that's not true

ETA: I think I'm just misreading the labeling of the particular map I'm looking at
This post was edited on 9/1/17 at 1:06 pm
Posted by rds dc
Member since Jun 2008
21248 posts
Posted on 9/1/17 at 1:05 pm to
Notice the green lines, they show Harvey (the green circle at the start) merging with the incoming trough. Then they show the next trough digging in as heights rise (red lines) off the East Coast. At this point, the key is the base of the green lines as the 2nd trough digs in (our 1st cold front of the season), does it cutoff and retrograde or does it lift out faster. Those are the doors to the Gulf that could be opened.
Posted by Duke
Dillon, CO
Member since Jan 2008
36491 posts
Posted on 9/1/17 at 1:11 pm to
I see it.

As the second trough starts splitting in possibilities, the Irma circle starts really fracturing in different directions. Really brings home the point

quote:

the key is the base of the green lines as the 2nd trough digs in (our 1st cold front of the season), does it cutoff and retrograde or does it lift out faster. 


It's a pretty interesting set up.
Posted by mellowbellow
SWLA
Member since Jul 2016
27 posts
Posted on 9/1/17 at 1:14 pm to
quote:

You guys want to see how much variability is cooked into the models past five or six days? Below is a composite of the 500 mb heights for each GFS ensamble member going out in time.




Is that Irma popping in as a smiley face out of the southeast?
Posted by rt3
now in the piney woods of Pineville
Member since Apr 2011
146896 posts
Posted on 9/1/17 at 1:21 pm to
I think the Euro may be running south this go round

still got a number of images to pop in though

ETA: ehh... I think my eyes may be deceiving me

"I'm thinkin' about gettin' thicker glasses"

This post was edited on 9/1/17 at 1:27 pm
Posted by cajunangelle
Member since Oct 2012
163904 posts
Posted on 9/1/17 at 1:25 pm to
quote:




From Charleston to the OBX? Am I reading this correctly?
Posted by slackster
Houston
Member since Mar 2009
91491 posts
Posted on 9/1/17 at 1:28 pm to
quote:

I think the Euro may be running south this go round still got a number of images to pop in though ETA: ehh... I think my eyes may be deceiving me


Unfortunately the Euro runs every 12 hours, and even then, it runs in 24 hour increments, at least on Tropical Tidbits. That makes it difficult to compare back to back runs.

That being said, this run seems to be very similar to the 00z run at this point.
Posted by rt3
now in the piney woods of Pineville
Member since Apr 2011
146896 posts
Posted on 9/1/17 at 1:30 pm to
quote:

Unfortunately the Euro runs every 12 hours, and even then, it runs in 24 hour increments, at least on Tropical Tidbits. That makes it difficult to compare back to back runs.

That being said, this run seems to be very similar to the 00z run at this point.

for some reason I thought the 00z run had it further away from the Windward Islands... but when I went back it did look much closer than I thought
Posted by rds dc
Member since Jun 2008
21248 posts
Posted on 9/1/17 at 1:34 pm to
quote:


That being said, this run seems to be very similar to the 00z run at this point.


At 150h, slightly north of 00z but the trough appears to be lifting out faster.
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1605 posts
Posted on 9/1/17 at 1:34 pm to
quote:

Where is "everything pointing toward this in the gulf?"


PEEJ said it would hit the east coast!
Posted by slackster
Houston
Member since Mar 2009
91491 posts
Posted on 9/1/17 at 1:35 pm to
quote:

At 150h, slightly north of 00z but the trough appears to be lifting out faster.


Correct me if I'm wrong, but a stronger storm is more likely to find a weakness in a ridge, correct?
Posted by otowntiger
O-Town
Member since Jan 2004
16866 posts
Posted on 9/1/17 at 1:37 pm to
quote:

Not for all of us. More North more quickly please, Irma.
Do you live in Bermuda? It is a good trend for all of us here in the Continental U.S. If you live in FL (like I do) this is definitely good news. Now keep in mind its still a loooong ways out so models, synoptic pattern can and will change between now and then, but if the latest Euro model plays out now I think the entire East Coast would be ok, as I see it.
Posted by rt3
now in the piney woods of Pineville
Member since Apr 2011
146896 posts
Posted on 9/1/17 at 1:37 pm to
quote:

At 150h, slightly north of 00z but the trough appears to be lifting out faster.

also... potential Jose seems better developed this time I believe
Posted by rds dc
Member since Jun 2008
21248 posts
Posted on 9/1/17 at 1:37 pm to
quote:



Correct me if I'm wrong, but a stronger storm is more likely to find a weakness in a ridge, correct?


It will be steered by the deep level flow vs the low level. That typically means it will move towards the weakness.
Posted by slackster
Houston
Member since Mar 2009
91491 posts
Posted on 9/1/17 at 1:38 pm to
From the very little I think I understand about steering currents and these goofy maps, it appears this setup through 168 hours would be concerning for the east coast:

Posted by slackster
Houston
Member since Mar 2009
91491 posts
Posted on 9/1/17 at 1:38 pm to
quote:

It will be steered by the deep level flow vs the low level. That typically means it will move towards the weakness.


Thanks.
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