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Message

re: Francine - Landfall in Terrebonne Parish as CAT 2 100 mph

Posted on 9/9/24 at 11:11 pm to
Posted by TigerNAtux
Louisiana
Member since Dec 2007
18622 posts
Posted on 9/9/24 at 11:11 pm to
Slack, you got a surge map for Lake Maurepas area?
Posted by jyoung1
Lafayette
Member since May 2010
2138 posts
Posted on 9/9/24 at 11:11 pm to
Can someone explain to me why all of what I circled isn’t purple?

I mean surely somewhere in south LA chances are higher than 5-10%.

Posted by Hamma1122
Member since Sep 2016
22312 posts
Posted on 9/9/24 at 11:12 pm to
This is a track I been seeing all day St Mary parish landfall
Posted by TDsngumbo
Member since Oct 2011
50747 posts
Posted on 9/9/24 at 11:13 pm to
Speaking of surge flooding, I never thought to check out rain totals. The latest GFS shows my area of Ascension getting nearly 12" of rain between now and Thursday morning.
Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 9/9/24 at 11:14 pm to
quote:

The eye is starting to look more fully closed now than it has up to this point on radar.


Which is surprising because it looks about as bad on satellite as it has all day.

Posted by TDsngumbo
Member since Oct 2011
50747 posts
Posted on 9/9/24 at 11:14 pm to
quote:


This is a track I been seeing all day St Mary parish landfall

St. Mary Parish to Vermillion Bay sure seem to be a hot spot among most models today and tonight.
Posted by Mr Roboto
Seattle
Member since Jan 2023
8153 posts
Posted on 9/9/24 at 11:15 pm to
quote:

Can someone explain to me why all of what I circled isn’t purple?

I’m assuming that’s sustained winds? Not sure
Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 9/9/24 at 11:15 pm to
quote:

Slack, you got a surge map for Lake Maurepas area?


NHC Storm Inundation
Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 9/9/24 at 11:20 pm to
quote:


Can someone explain to me why all of what I circled isn’t purple?

I mean surely somewhere in south LA chances are higher than 5-10%.


Well yeah, your map shows that too. The 3rd lightest shade of green is a 20-30% chance, and the yellow along the coast is 30-40% chance.

It's not purple because the storm itself doesn't even have 75 mph winds, so there is obviously a greater than 0% chance that it never gets there. The track uncertainty matters too, particularly when the hurricane force winds may only be a few dozen miles across.
This post was edited on 9/9/24 at 11:22 pm
Posted by BregmansWheelbarrow
Member since Mar 2020
3261 posts
Posted on 9/9/24 at 11:24 pm to
It’s 120 hours from now with the storm at current intensity, not future intensity, correct?
Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 9/9/24 at 11:27 pm to
quote:

It’s 120 hours from now with the storm at current intensity, not future intensity, correct?


quote:

These graphics show probabilities of sustained (1-minute average) surface wind speeds equal to or exceeding 64 kt (74 mph). These wind speed probability graphics are based on the official National Hurricane Center (NHC) track, intensity, and wind radii forecasts, and on NHC forecast error statistics for those forecast variables during recent years. Each graphic provides cumulative probabilities that wind speeds of at least 74 mph will occur during cumulative time periods at each specific point on the map. The cumulative periods begin at the start of the forecast period and extend through the entire 5-day forecast period at cumulative 12-hour intervals (i.e., 0-12 h, 0-24 h, 0-36 h, ... , 0-120 h).


It's based on future track, intensity, and NHC historial errors.
Posted by ned nederlander
Member since Dec 2012
5901 posts
Posted on 9/9/24 at 11:34 pm to
Because that’s the projected windfield at a single snap shot in time . . . I think
Posted by NolaAg04
Member since Aug 2016
79 posts
Posted on 9/9/24 at 11:34 pm to
The state has a good stage model but it runs in a supercomputer so you have to wait for the results on delay after each advisory they’re still on 5

https://cera.coastalrisk.live/
Posted by RBTiger
Baton Rouge
Member since Jun 2011
9187 posts
Posted on 9/9/24 at 11:40 pm to
Wonder if these Wind gust will hold up??
Fox Weather had BR in the 60-70mph Wind Gust Zone.
This post was edited on 9/9/24 at 11:58 pm
Posted by TigerNAtux
Louisiana
Member since Dec 2007
18622 posts
Posted on 9/9/24 at 11:43 pm to
Thanks!
Posted by Mr Roboto
Seattle
Member since Jan 2023
8153 posts
Posted on 9/9/24 at 11:45 pm to
Chris Bruin on The Weather Channel just said Baton Rouge could see the eye
This post was edited on 9/9/24 at 11:50 pm
Posted by CE Tiger
Metairie
Member since Jan 2008
41908 posts
Posted on 9/9/24 at 11:48 pm to
shite thought there was a 12am update not sure I can stay awake for a 1am
Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 9/9/24 at 11:49 pm to
quote:

Guy on The Weather Channel just said Baton Rouge could see the eye


Very plausible. The GFS is one of the major global models and it has the eye (or whatever is left of it) passing east of BR. The NHC has it passing slightly west of BR.
Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 9/9/24 at 11:50 pm to
quote:

shite thought there was a 12am update not sure I can stay awake for a 1am


1am update will be a position update only. No intensity forecast and no track forecast. Those will come at 4am. Go to bed.
Posted by FCP
Delta State Univ. - Fightin' Okra
Member since Sep 2010
5172 posts
Posted on 9/9/24 at 11:56 pm to
quote:

GFS is one of the major global models and it has the eye (or whatever is left of it) passing east of BR
Definitely a little pucker on seeing the GFS track since it puts the center on top of my house.

Although even a path to the west side of BR is troubling since I'd still be in the NE quadrant.

No evacuations, but Demco's refusal to clean ROWs is gonna have our power out for a week or more.
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