Whats that spin in the middle Gulf?

[Trugunzn]

There is a spi in the middle gulf. Any chances?

http://www.ssd.noaa.gov/goes/east/gmex/loop-avn.html

[Stormavoider]

It's a ULL trying to get to the surface.

[Damar91]

Yeah, amd there seems to be alot of moisture for it to work with. Wonder if this will effect at all a future Ernesto? (97L)

[MiamiensisWx]

It's an ULL under weak steering currents moving slowly west-southwestward near Louisiana (it's nearly stationary). It has partly helped to spark off scattered thunderstorms over interior and coastal southern Florida this afternoon due to weak to moderate mid-level west-southwest to southwesterly flow here.

[SouthAlabamaWX]

It is a mid and upper level low. It is located 268 miles south of Mobile, Alabama. It is nearly stationary and progged to move south and southwest in the next 24 hours.

[Wx_Warrior]

Heard the same from KFDM....

[caneman]

http://www.ndbc.noaa.gov/station_page.php?station=DPIA1

[caneman]

http://www.ndbc.noaa.gov/station_page.php?station=DPIA1

[TexWx]

"http://www.ndbc.noaa.gov/station_page.php?station=DPIA1"

Evening pressure drop?

[Stormavoider]

"http://www.ndbc.noaa.gov/station_page.php?station=DPIA1"

Evening pressure drop?

big one

http://www.ndbc.noaa.gov/show_plot.php?station=dpia1&meas=pres&uom=E

[caneman]

"http://www.ndbc.noaa.gov/station_page.php?station=DPIA1"

Evening pressure drop?

Look at the 24 hour pressure fall. .10 pretty significant. Watch and see.

[Stormavoider]

How often do ULLs transition to tropical systems? Is there much history of this?

[caneman]

How often do ULLs transition to tropical systems? Is there much history of this?

Happens althoug not that often and takes time.

[cycloneye]

How often do ULLs transition to tropical systems? Is there much history of this?

A good question that you can post at our new questions forum.

http://www.storm2k.org/phpbb2/viewforum.php?f=42

[Stormavoider]

How often do ULLs transition to tropical systems? Is there much history of this?

A good question that you can post at our new questions forum.

http://www.storm2k.org/phpbb2/viewforum.php?f=42

Well, I considered that. But considering it pertains to this topic, I thought it better to post it here. Are all questions supposed to be posted in this other forum?

[TS Zack]

If I had to take a guess it would be very rarely. Most of the time a tropical wave interacting with a upper-low develops tropical systems. Depends on what you define a upper-low becoming a tropical system.

I have very rarely seen just an upper-low working down to the surface & tropical formation occuring, without any other influence.

[ammmyjjjj]

Isn't that kind of what happened with Hurricane Alicia in '83? Same place also, right?

[ROCK]

Isn't that kind of what happened with Hurricane Alicia in '83? Same place also, right?

not exactly, Amy. It was more like a MC coming off the coast and festering in the GOM for a couple of days in 83. We had a few like that this year but only made it to the mid-levels before fizzling out.