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Chill falls over the Atlantic as the official season heads towards close
Days since last H. Landfall - US: Any 211 (Idalia) , Major: 211 (Idalia) Florida - Any: 211 (Idalia) Major: 211 (Idalia)
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General Discussion >> The Tropics Today

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Beach
Weather Guru


Reged: Wed
Posts: 187
Loc: Cocoa Beach/Banana River
Upper Low
      #93019 - Wed Jul 11 2012 02:05 PM

So I'm looking at 25N / 60-65W:
http://www.ssd.noaa.gov/goes/east/tatl/flash-wv.html

The closest Bouy:
Wind Direction (WDIR): E ( 80 deg true )
Wind Speed (WSPD): 13.6 kts
Wind Gust (GST): 17.5 kts
Wave Height (WVHT): 3.9 ft
Dominant Wave Period (DPD): 7 sec
Average Period (APD): 4.9 sec
Mean Wave Direction (MWD): ESE ( 122 deg true )
Atmospheric Pressure (PRES): 30.16 in
Pressure Tendency (PTDY): -0.03 in ( Falling )
Air Temperature (ATMP): 81.5 °F
Water Temperature (WTMP): 82.8 °F
Dew Point (DEWP): 73.2 °F
Heat Index (HEAT): 86.7 °F


It's getting stormy but NO surface winds from the WEST to kick this baby off.

(Moved to a more appropriate Forum.)

Edited by Ed Dunham (Wed Jul 11 2012 03:10 PM)


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Ed DunhamAdministrator
Former Meteorologist & CFHC Forum Moderator (Ed Passed Away on May 14, 2017)


Reged: Sun
Posts: 2565
Loc: Melbourne, FL
Re: Upper Low [Re: Beach]
      #93020 - Wed Jul 11 2012 03:16 PM

At 11/18Z an upper level low was centered near 25N 57W and it was moving west to west southwest at 20 knots. Not too much convection with it at the moment, although it is moving into an area of increasing moisture. As noted above, no surface reflection is evident yet.
ED


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Lamar-Plant City
Storm Tracker


Reged: Mon
Posts: 383
Loc: Plant City, Florida
Re: Upper Low [Re: Ed Dunham]
      #93021 - Wed Jul 11 2012 07:30 PM

It looks like 'evil eyes' on the WV loop with the two ULLs (the other one around 30N 35W and the dry slot in between. The ULL at 60W looks pretty impressive for its symmetry if not its moisture. Moving as it is in my general direction it might present some interesting scenarios will all of the moisture on the FL peninsula right now.

--------------------
If you don't like the weather, wait 5 minutes...
2023 Season Prediction: 17/6/2


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LoisCane
Veteran Storm Chaser


Reged: Fri
Posts: 1236
Loc: South Florida
Re: Upper Low [Re: Lamar-Plant City]
      #93022 - Thu Jul 12 2012 09:06 AM

It's fascinating to watch moisture fill and the ULL change it's look. Hard not to watch it. Nothing else spinning in the Atlantic Basin.

Wish there was more discussion on systems that have formed from this scenario... S L O W L Y over time.

http://www.goes.noaa.gov/HURRLOOPS/huirloop.html

--------------------
http://hurricaneharbor.blogspot.com/


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doug
Weather Analyst


Reged: Mon
Posts: 1006
Loc: parrish,fl
Re: Upper Low [Re: LoisCane]
      #93023 - Thu Jul 12 2012 01:29 PM

At the risk of injecting speculative analysis into a discussion, I noted yesterday that radar and visible suggested that a general low level cyclonic spin was evident over south Fla. Today that seems to be now in southern Polk/ northern Highlands Counties and drifting west. It seems more evident today and is influencing low level movement of clouds and rain. Obviously nothing imminent going on here but, worth watching?

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doug


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LoisCane
Veteran Storm Chaser


Reged: Fri
Posts: 1236
Loc: South Florida
Re: Upper Low [Re: doug]
      #93024 - Thu Jul 12 2012 08:47 PM

definitely worth watching... consistency is everything... see what it looks like once it's over water

in years like this... things often form close in

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http://hurricaneharbor.blogspot.com/


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Beach
Weather Guru


Reged: Wed
Posts: 187
Loc: Cocoa Beach/Banana River
Re: Upper Low - GOM [Re: LoisCane]
      #93026 - Fri Jul 13 2012 06:58 AM

Good Morning Folks,

I see the 1014 surface low up in the crook of the panhandle.
But the rotation associated with the wave just North of the Yucatan seems interesting.
http://www.ssd.noaa.gov/goes/east/gmex/flash-wv.html

If you look at the closest Bouy Station 42003 (LLNR 1395) - E GULF 208 nm West of Naples, FL :
Wind Direction (WDIR): WSW ( 250 deg true )
Wind Speed (WSPD): 9.7 kts
Wind Gust (GST): 13.6 kts
Wave Height (WVHT): 1.0 ft
Dominant Wave Period (DPD): 4 sec
Average Period (APD): 4.1 sec
Mean Wave Direction (MWD): E ( 89 deg true )
Atmospheric Pressure (PRES): 29.97 in
Pressure Tendency (PTDY): -0.01 in ( Falling )
Air Temperature (ATMP): 81.0 °F
Water Temperature (WTMP): 85.1 °F

Pressure has been fallinig


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weatherhead
Verified CFHC User


Reged: Sun
Posts: 13
Loc: Florida
Re: Upper Low - GOM [Re: Beach]
      #93028 - Sun Jul 15 2012 12:24 PM

A signature of a low pressure is present on radar just off the coast of Ft. Lauderdale, similar to the small one present a few days ago which came ashore in Palm Beach. Although nothing will form, it just gives us something to look at.

http://radar.weather.gov/ridge/radar.php?rid=AMX&product=N0R&overlay=11101111&loop=yes

--------------------
Claims Adjuster


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Beach
Weather Guru


Reged: Wed
Posts: 187
Loc: Cocoa Beach/Banana River
Re: Upper Low [Re: Beach]
      #93029 - Wed Jul 18 2012 06:17 AM

Looking this morning:
http://www.ssd.noaa.gov/goes/east/nwatl/flash-wv.html
Look how well that upper low looks.


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Lamar-Plant City
Storm Tracker


Reged: Mon
Posts: 383
Loc: Plant City, Florida
Re: Upper Low [Re: Beach]
      #93030 - Thu Jul 19 2012 12:39 AM

The one over Georgia sure gave us a bucketful of rain here in Central Florida. We've had over 5 inches since last Saturday. That dry slot northeastward through the Bahamas is supposed to move over us and dry things out until Sunday....and we need it!!

--------------------
If you don't like the weather, wait 5 minutes...
2023 Season Prediction: 17/6/2


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Beach
Weather Guru


Reged: Wed
Posts: 187
Loc: Cocoa Beach/Banana River
Re: Upper Low [Re: Beach]
      #93031 - Thu Jul 19 2012 07:20 AM

The ULL that wouldn't go away.
http://www.ssd.noaa.gov/goes/east/eaus/flash-wv.html

It started out over the Atlantic and has been trolling along for a week now, maybe longer. It is adding all kinds of instability to our upper atmosphere in Central FL and we are getting huge amounts of rain. My grass is defineatly digging it.


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