ATL: IRMA - Post-Tropical - Discussion

[NDG]

2:00 PM EDT Fri Sep 8
Location: 22.0°N 76.0°W
Moving: W at 14 mph
Min pressure: 925 mb
Max sustained: 155 mph

[BYG Jacob]

Looks like Irma might be restrengthening again after posters earlier here stated it would quickly weaken to a cat 2 by tomorrow. Please don't undermine the threat.

To be fair, most of those had the qualifier of her going over Cuba IIRC.

[znel52]

look going make land fall in cuba if keep going to west

Good call lol

[stormhunter7]

Quick question..... does anyone now what the low level wave like features that are seen in hi-res visible that look like pressure waves expanding out on the NW side of the Irma this morning?

There were some great images of gravity waves the last couple days when Irma was at 180+mph. You're talking about circular ripples that radiate out from the center?

Yeah. I saw them the other day too! I suspected that what they were caused they are down low and close to surface.... Unfortunate there is no obs in area that they are going over to see what happens. lol

[Kenderkin17]

So Irma is back to Cat. 5, and Jose is very very close to Cat 5 with many Cat 5 readings flagged from the most recent Recon. We may actually have two Cat 5 Hurricanes within the next few hours. It's a terrifying, amazing, and humbling all at the same time.

[Evil Jeremy]

How large can the hurricane windfield potentially expand to after the EWRC is complete, and is that possible expansion accounted for in the NHC wind field probability?

[cvalkan4]

So Irma is back to Cat. 5, and Jose is very very close to Cat 5 with many Cat 5 readings flagged from the most recent Recon. We may actually have two Cat 5 Hurricanes within the next few hours. It's a terrifying, amazing, and humbling all at the same time.

155 is still Cat 4

[Full8s]

I'm sure many of you have used this resource before, but for those who are inland like myself, and who are still anxiously following forecast wind speeds, this tabular forecast is very helpful:

http://forecast.weather.gov/MapClick.php?w0=t&w1=td&w2=hi&w3=sfcwind&w3u=1&w4=sky&w5=pop&w6=rh&w7=rain&w8=thunder&w10u=0&w12u=1&w13u=1&AheadHour=0&FcstType=digital&textField1=28.3577&textField2=-82.6995&site=all&unit=0&dd=&bw=&AheadDay.x=60&AheadDay.y=6&AheadDay=48

Very useful. Thnx.

How do you plug in your location? Search box?

I did find it a bit cumbersome to navigate to this page, so I bookmarked it... but here's the path I took to get there:

forecast.weather.gov
enter zip code in top left box
select your location
scroll to the bottom of the page and find the heading "Additional Forecasts and Information"
select "tabular forecast"

[dukeblue219]

So Irma is back to Cat. 5, and Jose is very very close to Cat 5 with many Cat 5 readings flagged from the most recent Recon. We may actually have two Cat 5 Hurricanes within the next few hours. It's a terrifying, amazing, and humbling all at the same time.

It's not technically a Category 5 just yet as the 2pm advisory is 155mph. Irma will have to wait until the 5pm advisory, and even then recon will just be arriving in the storm. Unless the satellite imagery shows unmistakable strengthening, I doubt NHC will bump it back up before they have that hard recon data.

[znel52]

So Irma is back to Cat. 5, and Jose is very very close to Cat 5 with many Cat 5 readings flagged from the most recent Recon. We may actually have two Cat 5 Hurricanes within the next few hours. It's a terrifying, amazing, and humbling all at the same time.

Irma stil a Cat 4 at 155. Has to be >157 for Cat 5. Minute difference but just the way the classification works.

[Kenderkin17]

Fair enough I stand rightly corrected.

[Evil Jeremy]

With the shutters blocking all natural light, I have to keep reminding myself that it's not very late at night right now.

[GCANE]

[bob rulz]

 https://twitter.com/1WTFNews/status/906196650007384065

Why haven't they opened up the other lanes to outbound traffic? They could keep 1 or 2 lanes of traffic open for any vehicles (mostly emergency/relief/supply vehicles) going the other direction.

[northjaxpro]

Storm2K site map shows at the moment Irma as Cat 5. So, is Irma back at Cat 5 strength officially?

[Extratropical94]

Storm2K site map shows at the moment Irma as Cat 5. So, is Irma back at Cat 5 strength officially?

That's likely some conversion error within the code behind the graphic. 135kt/155mph is Cat 4.

[dhweather]

So Irma is back to Cat. 5, and Jose is very very close to Cat 5 with many Cat 5 readings flagged from the most recent Recon. We may actually have two Cat 5 Hurricanes within the next few hours. It's a terrifying, amazing, and humbling all at the same time.

Irma stil a Cat 4 at 155. Has to be >157 for Cat 5. Minute difference but just the way the classification works.

Yes, I'd much rather be hit by an object doing 155mph than 157mph.

Practically the entire Florida peninsula is at risk here for hurricane force winds. There is a great deal of potential for widespread damage setting up here, and I hate it for everyone impacted. This will likely be a life changing event for many people.

[MrStormX]

I'm not a pro met, but the last minute turn into SW Florida that the models are predicting might stunt the storm surge threat. Storm surge builds up over time, and a sudden and quick turn by Irma might not allow the storm surge to catch up. The surge will likely still be bad, but my suspicion is that it will not be what we would normally expect from a large cat 4/5. Of course local residents should consult their emergency officials for advice on surge and storm impacts, not me.

[Blinhart]

How many different flights are there going on in Irma? Jose? Katia?

[meriland29]

To be fair, the nhc did say sshe would fluctuate intensity back and forth.