Gulf of Mexico (Is Invest 91L)

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Ed Mahmoud

Re: Gulf of Mexico area

#201 Postby Ed Mahmoud » Tue Jul 29, 2008 8:14 pm

Sean in New Orleans wrote:It appears to definitely have a surface low....I smell a depression by morning, which would be fine by me...give me and my yard a good 5 or 6 inches. Love to have it....



East wind South of the center, West winds North of the center, I smell no depression at all.


If that mid-level center kept storms firing, might eventually lower the surface pressures, but, if you'll notice, we are in full poof-ation mode now.
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Re: Gulf of Mexico area

#202 Postby RL3AO » Tue Jul 29, 2008 8:15 pm

Sean in New Orleans wrote:It appears to definitely have a surface low....I smell a depression by morning, which would be fine by me...give me and my yard a good 5 or 6 inches. Love to have it....


It has a surface high and a mid-level low.
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Re: Gulf of Mexico area

#203 Postby canetracker » Tue Jul 29, 2008 8:16 pm

Sean in New Orleans wrote:It appears to definitely have a surface low....I smell a depression by morning, which would be fine by me...give me and my yard a good 5 or 6 inches. Love to have it....


Agree that I'd love to have the rain, but, where are you seeing a surface low?
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Re: Gulf of Mexico area

#204 Postby Sean in New Orleans » Tue Jul 29, 2008 8:19 pm

It's dropping to the surface as we speak...it's mid to lower level on the last visible frame. We'll see. Where this system is located, we could have a full fledged tropical storm by tomorrow morning or a few thunderstorms. Only time will tell what will happen. I've seen both scenarios many times.
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Ed Mahmoud

Re: Gulf of Mexico area

#205 Postby Ed Mahmoud » Tue Jul 29, 2008 8:32 pm

WxMan57 will probably correct me, but I understood a mid level center worked to the surface by triggering storms, which release energy through latent heat, and all that good stuff, plus evacuate air from near the surface, which increases convergence, which helps keep the storms going, which evacuates more air, yada, yada, yada.

No thunderstorms, no working of a mid level center to the surface.

If this was 500 miles from land, it might have time for the mid-level center to fire new storms, and try to work down. But that takes a day or two, and this doesn't have it.

It would have generally anticyclonic outflow on its side, but air just above the surface dry enough dewpoints mixed down into the 60s most of Southeast Texas, a tad lower than usual, ie, less tropical.
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#206 Postby Sean in New Orleans » Tue Jul 29, 2008 8:39 pm

We'll see...I've seen storms form 50 miles off of the Coast and a depression or small tropical storm doesn't always reveal "anticyclonic outflow." Sometimes anticyclonic outflow doesn't even reveal itself until the system is a hurricane.
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Re: Gulf of Mexico area

#207 Postby srainhoutx » Tue Jul 29, 2008 8:41 pm

No T storms, no development. Although "Dolly's" remnants still an issue NW of OK City...

http://radar.weather.gov/Conus/full_loop.php
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#208 Postby Sean in New Orleans » Tue Jul 29, 2008 8:45 pm

Dewpoints look to support tropical development...I see mid 70's completely surrounding the system. That's downright tropical:

Image
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Re: Gulf of Mexico area

#209 Postby canetracker » Tue Jul 29, 2008 8:53 pm

Winds are generally from the Southwest at this time, per the buoy link below, and pressures are stable or barely dropping.
http://www.pdfamily.com/weather/buoy/CGbuoy.php

True that stranger things have happened in regards to tropical development, but I guess we will have to see. Personally, I am just happy with the rain.

The visible is sure interesting but lacking convection
http://www.ssd.noaa.gov/goes/east/gmex/loop-vis.html
Last edited by canetracker on Tue Jul 29, 2008 8:55 pm, edited 1 time in total.
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Re: Gulf of Mexico area

#210 Postby Stormcenter » Tue Jul 29, 2008 8:55 pm

I expect another burst of convection later tonight or early tomorrow morning where the "possible"
center is.

http://adds.aviationweather.gov/satelli ... itype=irbw
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Re: Gulf of Mexico area

#211 Postby wxman57 » Tue Jul 29, 2008 8:56 pm

Sean in New Orleans wrote:It appears to definitely have a surface low....I smell a depression by morning, which would be fine by me...give me and my yard a good 5 or 6 inches. Love to have it....


No, it doesn't. The rotation is anticyclonic with higher pressures near the convection. It's not a surface low.
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#212 Postby RL3AO » Tue Jul 29, 2008 8:56 pm

Winds continue to be from the southwest and south over Louisiana. There is no surface low.
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Re: Gulf of Mexico area

#213 Postby Sean in New Orleans » Tue Jul 29, 2008 8:59 pm

Stormcenter wrote:I expect another burst of convection later tonight or early tomorrow morning where the "possible"
center is.

http://adds.aviationweather.gov/satelli ... itype=irbw

Same here.
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Re: Gulf of Mexico area

#214 Postby canetracker » Tue Jul 29, 2008 9:09 pm

Image

WEDNESDAY
Mostly cloudy, warm, and humid with a 60% chance for showers and thunderstorms. Highs around 88. Wind SW 6-12 mph.

WEDNESDAY NIGHT
Mostly cloudy, warm, and muggy with a 20% chance for isolated showers or thunderstorms. Lows around 76. Wind SW 3-5 mph.


http://www.wwltv.com/weather/detailed.html

I think we will see another burst of convection too, but IMO, don't see an LLC forming at this time.
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Re: Gulf of Mexico area

#215 Postby Sean in New Orleans » Tue Jul 29, 2008 9:16 pm

canetracker wrote:Image

WEDNESDAY
Mostly cloudy, warm, and humid with a 60% chance for showers and thunderstorms. Highs around 88. Wind SW 6-12 mph.

WEDNESDAY NIGHT
Mostly cloudy, warm, and muggy with a 20% chance for isolated showers or thunderstorms. Lows around 76. Wind SW 3-5 mph.


http://www.wwltv.com/weather/detailed.html

I think we will see another burst of convection too, but IMO, don't see an LLC forming at this time.


NWS has us at 70% tomorrow. At least it won't be so HOT.
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Re: Gulf of Mexico area

#216 Postby canetracker » Tue Jul 29, 2008 9:25 pm

Sean,
You've gotta love this weather. The rain and cool temps are awesome. We also have the weekend to look forward to when a repeat of this system may happen again. Who knows next weekends system may actually amount to something.

Local met, Bob Breck, just said we may have a repeat of rain again around the wee hours of the morning.
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Re: Gulf of Mexico area

#217 Postby LaBreeze » Tue Jul 29, 2008 9:32 pm

Yes Sean I agree. The rain-cooled temps are really nice after the heat we've had. High rain chances for tomorrow here as well. Rains are welcomed.
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Re: Gulf of Mexico area

#218 Postby Sanibel » Tue Jul 29, 2008 10:38 pm

Doesn't look likely to refire.
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Re: Gulf of Mexico area

#219 Postby stormy1970al » Tue Jul 29, 2008 11:20 pm

It is raining here in South Alabama but that is about all. No storm out of this except that occasional rain.
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Re: Gulf of Mexico area

#220 Postby Stormcenter » Tue Jul 29, 2008 11:35 pm

Sanibel wrote:Doesn't look likely to refire.


I wouldn't bet against that as long as it's over water.
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