Possible Tropical Threat to Louisiana

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donsutherland1
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Possible Tropical Threat to Louisiana

#1 Postby donsutherland1 » Fri Oct 08, 2004 11:09 am

A possible developing tropical disturbance (Invest. 95) was centered at approximately 24.2°N 95.7°W earlier this morning. Based on satellite imagery and buoy reports, there are indications that a tropical depression might be forming. Reconnaissance reports this afternoon should provide greater clarity on this situation.

In any case, I believe odds favor the development of a tropical depression and likely a tropical storm, particularly when the system reaches 25.5°N to 26.5°N. If it does become a tropical storm, it will be named Matthew. At this time, I do not expect this system to become a hurricane.

In terms of its track, there are two clusters of possible tracks based on past storms that developed near where this system is taking shape:

• North or north-northeastward to landfall. A representative storm track would be that of Hurricane #5 (1948):

Image

• Sharp recurvature more to the east prior to landfall. A representative storm track would be that of Tropical Storm Josephine (1996):

[img]http://weather.unisys.com/hurricane/atlantic/1996/JOSEPHINE/track.gif [/img]

Current Synoptic Situation (ECMWF):
Image

Based on the forecast synoptic situation, I favor a track more along the lines of the first set of tracks with landfall possibly occurring either in eastern Cameron Parish or Vermilion Parish.

Tropical Storm Josephine’s synoptic situation was completely different from that of the current situation. At the time Josephine was developing, low pressure was moving through the Deep South and the close proximity of this trough swept Josephine toward Florida.

Tropical Storm Josephine's Synoptic Situation:
Image
In the end, this system will be primarily remembered for its copious rainfall rather than its winds.
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#2 Postby Lindaloo » Fri Oct 08, 2004 11:26 am

Excellent post don. Thanks!
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#3 Postby donsutherland1 » Fri Oct 08, 2004 11:29 am

Thanks, Lindaloo.

Of course, it is possible that this system could track somewhat farther east. We'll see what the recon. finds. Perhaps tonight, I'll outline a track with coordinates as I had done with Ivan and Jeanne.
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#4 Postby WeatherEmperor » Fri Oct 08, 2004 11:49 am

Eventhough the patterns are different, it looks as though this system will take a more Josephine route because of its almost due E motion right now. Remember that is only one model that you looked at.

<RICKY>
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#5 Postby Cape Verde » Fri Oct 08, 2004 11:54 am

I like any forecast that misses Texas.
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#6 Postby QueenBee » Fri Oct 08, 2004 11:58 am

Weather Emperor it is not due east. The storm is being sheared. The eye is still near Texas.
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#7 Postby HoumaLa » Fri Oct 08, 2004 12:05 pm

I don't know if it will hit louisiana or not but i'm about tired of the rain. Some of the sugarcane is laying flat because of some wind. My yard is flooded and everynow and then i have white caps in the side yard. Just waiting on what ever to happen.
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#8 Postby Steve » Fri Oct 08, 2004 12:11 pm

>>I don't know if it will hit louisiana or not but i'm about tired of the rain

You know you're from Louisiana when you read that someone is "about tired" and understand what they're saying. Speaking of which Houma, I've got about 10 Abita Ambers iced up for my carport tonight where I will hang out, drink and smoke cigarettes about to an ungodly awful hour. You know the LA routine, you make do with what you get, and chances are, there might be some crawfish in your yard. Throw 'em into the mix.

Steve
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#9 Postby donsutherland1 » Fri Oct 08, 2004 12:13 pm

WeatherEmperor,

I don't dismiss the idea that this system could track farther to the east to landfall. I'll need to see its actual center and then re-examine the synoptic situation/modeling before actually estimating the coordinates for a track that I would expect.

However, one has to be careful to differentiate between the visible effects of shear and actual storm movement (later coordinates will help resolve this matter). The CIMSS steering products also argue against a current eastward track.

FWIW, I just used the ECMWF to illustrate the synoptic situation because I believe it fairly represents the situation. The 12z runs of the ETA and GFS don't portray significantly different synoptic setups. None of these models seems to point to a Josephine-like setup.

But let's see what happens.
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#10 Postby HoumaLa » Fri Oct 08, 2004 3:09 pm

Yes Steve i'll throw some crawfish in the mix if any come up LOL
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#11 Postby stormie_skies » Fri Oct 08, 2004 3:14 pm

Mmmmm dont talk to me about crawfish....Im hungry as it is! :37:
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#12 Postby Mattie » Fri Oct 08, 2004 3:15 pm

ROFL Steve. . . boy do I miss home!!! Garage/carport/River bank/camp parties (anywhere there are two or more gathered near an ice chest) <grin> for a good game of booray and just passing a good time, storm or no storm. . .

I do remember after heavy rains back in the 80's the crawfish evacuated because their homes were flooded across the highways and we were stopping to pick them up by the shovel fulls. Man, yea! That was some good eatin!

(yes - I'm old). . .
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#13 Postby donsutherland1 » Fri Oct 08, 2004 4:04 pm

Two quick notes:

1) Tropical Storm Matthew is well east of the position I had noted earlier.
2) The easterly motion indicates that Louisiana is all but certainly in the clear.

I'll sketch out a track shortly based on this data.
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ColdFront77

#14 Postby ColdFront77 » Fri Oct 08, 2004 4:20 pm

Don, I don't believe I have seen a forecast map from you. I can't be missing them with my frequent participation on this board.
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SouthernWx

#15 Postby SouthernWx » Fri Oct 08, 2004 4:31 pm

ColdFront77 wrote:Don, I don't believe I have seen a forecast map from you. I can't be missing them with my frequent participation on this board.


Forecast maps or not, IMO Don is similar to Merrill Lynch....when he speaks, people listen (meaning he's very accurate).
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ColdFront77

#16 Postby ColdFront77 » Fri Oct 08, 2004 7:00 pm

Sure, Perry. I was kindly (must not have sounded kindly) indicating I never saw a map from him. Sounded like he has done them before and I somehow missed them.
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#17 Postby donsutherland1 » Fri Oct 08, 2004 10:06 pm

Tom,

I've provided coordinates before. Unfortunately, at this time, I don't have mapping software to plot a track on a map layout based on those coordinates.

Best wishes.
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SouthernWx

#18 Postby SouthernWx » Fri Oct 08, 2004 11:12 pm

Kevin, I'd keep an eye on it....because tropical cyclones are sometimes unpredictable, but I honestly believe a possible landfall farther south than Tampa Bay is extremely low (and even in Tampa the probability is IMO <10%).

The odds are highest between southeast Louisiana and Apalachee Bay.....with unfortunately, the area slammed by hurricane Ivan (Mobile to Destin) at highest risk....the winds hopefully won't be an issue, but those folks don't need several inches of rain (nor do we here in metro Atlanta :eek:
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#19 Postby ColdFront77 » Fri Oct 08, 2004 11:52 pm

donsutherland1 wrote:Tom,

I've provided coordinates before. Unfortunately, at this time, I don't have mapping software to plot a track on a map layout based on those coordinates.

Best wishes.

Okay, no problem. Thank you for the reply.
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#20 Postby donsutherland1 » Sat Oct 09, 2004 9:24 pm

Thanks, Perry, for the very kind words. I greatly appreciate them.

Have a terrific weekend.
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