Low Pressure in Western Atlantic

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HurrMark
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#41 Postby HurrMark » Thu Sep 12, 2013 10:32 am

chaser1 wrote:
Where I disagree with you however is the potential risk to the SE Conus. This present set up could certainly allow a Caribbean borne system to develop and move generally northward and I think Cuba, Florida, the Bahamas and potentially even up to the Carolina's are still very much at risk of a system approaching from the south. I am guessing that their might be a 4 week window for this potential risk. Might be interesting to see if this active monsoon low over/around Central America might be a trigger for any low dragging waves coming across N. South America to peculate, deepen and potentially move NNW or Northward. [/color]


If you look at the 200 mb winds forecasted, for virtually the entire GFS run they are from west to east across even the southern part of Florida, and pretty strong at that. Unless it is a weak sheared system, there is no way for anything to make it that far from the east.

It is true that something could form in the Caribbean ala Wilma and move northeastward over west Florida. But with the Texas ridge holding its grip, that might not be feasible.

The Mexican coast is definitely the hot spot this year...no question about it.
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#42 Postby cycloneye » Thu Sep 12, 2013 12:33 pm

THE SHOWER ACTIVITY ASSOCIATED WITH A BROAD AREA OF LOW PRESSURE
CENTERED ABOUT 450 MILES EAST OF THE LEEWARD ISLANDS REMAINS
LIMITED. ALTHOUGH SURFACE PRESSURES ARE STILL FALLING IN THE
AREA...ENVIRONMENTAL CONDITIONS ARE NOT FAVORABLE FOR DEVELOPMENT.
THIS DISTURBANCE HAS A LOW CHANCE...10 PERCENT...OF BECOMING A
TROPICAL CYCLONE DURING THE NEXT 48 HOURS. ALTHOUGH UPPER-LEVEL
WINDS COULD BECOME A LITTLE MORE FAVORABLE IN SEVERAL DAYS...THIS
SYSTEM STILL HAS A LOW CHANCE...20 PERCENT...OF BECOMING A TROPICAL
CYCLONE DURING THE NEXT 5 DAYS AS IT MOVES TOWARD THE
WEST-NORTHWEST.
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#43 Postby ninel conde » Thu Sep 12, 2013 1:27 pm

HurrMark wrote:
chaser1 wrote:
Where I disagree with you however is the potential risk to the SE Conus. This present set up could certainly allow a Caribbean borne system to develop and move generally northward and I think Cuba, Florida, the Bahamas and potentially even up to the Carolina's are still very much at risk of a system approaching from the south. I am guessing that their might be a 4 week window for this potential risk. Might be interesting to see if this active monsoon low over/around Central America might be a trigger for any low dragging waves coming across N. South America to peculate, deepen and potentially move NNW or Northward. [/color]


If you look at the 200 mb winds forecasted, for virtually the entire GFS run they are from west to east across even the southern part of Florida, and pretty strong at that. Unless it is a weak sheared system, there is no way for anything to make it that far from the east.

It is true that something could form in the Caribbean ala Wilma and move northeastward over west Florida. But with the Texas ridge holding its grip, that might not be feasible.

The Mexican coast is definitely the hot spot this year...no question about it.


i need a pat on the back, lol. back in july i was saying the nw flow would dominate the east coast and west atlantic and the only place of interest in the entire basin would be the BOC. texas ridge hasnt budged and the much ballyhooed east coast ridging is absent. old 98L is still giving it a try.
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#44 Postby ScottNAtlanta » Thu Sep 12, 2013 1:34 pm

Pressure at the closest buoy which is east by 2 degrees is down to around 1006mb as of the last report, so pressures are definitely low in the area (and still falling)
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#45 Postby Aric Dunn » Thu Sep 12, 2013 2:20 pm

Euro developing it then loses it then brings it back.
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#46 Postby Hammy » Thu Sep 12, 2013 3:06 pm

Though largely devoid of convection there still seems to be a fairly tight circulation, at least at cloud level.
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#47 Postby cycloneye » Thu Sep 12, 2013 6:28 pm

8 PM TWO.

SHOWER ACTIVITY ASSOCIATED WITH A BROAD AREA OF LOW PRESSURE
CENTERED ABOUT 450 MILES EAST OF THE LEEWARD ISLANDS REMAINS
LIMITED...AND ENVIRONMENTAL CONDITIONS ARE NOT FAVORABLE FOR
DEVELOPMENT. THIS SYSTEM HAS A LOW CHANCE...10 PERCENT...OF
BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. WHILE
UPPER-LEVEL WINDS COULD BECOME A LITTLE MORE FAVORABLE IN SEVERAL
DAYS...THIS SYSTEM STILL HAS A LOW CHANCE...20 PERCENT...OF
BECOMING A TROPICAL CYCLONE DURING THE NEXT 5 DAYS AS IT MOVES
TOWARD THE WEST-NORTHWEST AT AROUND 10 MPH.
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#48 Postby Gustywind » Thu Sep 12, 2013 7:40 pm

8 PM Tropical Weather Discussion.

IN THE TROPICS...A 1005 MB LOW IS CENTERED NEAR 17N54W AND IS EXPECTERD TO MOVE W AND DISSIPATE PRIOR TO REACHING THE LEEWARD ISLANDS.
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#49 Postby floridasun78 » Thu Sep 12, 2013 8:36 pm

why nhc gave it 20% next 5 day if going die by DISSIPATE PRIOR TO REACHING THE LEEWARD ISLANDS.
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ninel conde

#50 Postby ninel conde » Thu Sep 12, 2013 10:30 pm

still holding on tenaciously.
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Re: Low Pressure east of Lesser Antilles - 10% - 20%

#51 Postby abajan » Fri Sep 13, 2013 5:56 am

The barometric pressure in Barbados has been quite low since yesterday, especially early this morning:

Image

Those are the kind of readings one would normally get in a tropical depression.
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#52 Postby Gustywind » Fri Sep 13, 2013 6:04 am

2 AM TWO.

AN AREA OF LOW PRESSURE LOCATED ABOUT 400 MILES EAST OF THE LEEWARD
ISLANDS IS PRODUCING LIMITED SHOWER AND THUNDERSTORM ACTIVITY.
WHILE SURFACE PRESSURES ARE LOW IN THIS AREA...SIGNIFICANT
DEVELOPMENT OF THIS SYSTEM IS UNLIKELY DUE TO UNFAVORABLE
UPPER-LEVEL WINDS.
THIS SYSTEM HAS A LOW CHANCE...10 PERCENT...OF
BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS...AND A LOW
CHANCE...20 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE
NEXT 5 DAYS WHILE IT MOVES TOWARD THE WEST-NORTHWEST AT ABOUT 10
MPH.
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#53 Postby Gustywind » Fri Sep 13, 2013 6:05 am

2 AM TWD.

A 1005 MB LOW APPROACHING THE LEEWARD ISLANDS IS CENTERED NEAR 17N55W WITH CLUSTERS OF SCATTERED MODERATE CONVECTION WITHIN 150 NM OF LINE FROM 10N48W TO 18N54W.
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TheStormExpert

#54 Postby TheStormExpert » Fri Sep 13, 2013 1:03 pm

No longer mentioned as of the 2pm TWO.
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#55 Postby Aric Dunn » Fri Sep 13, 2013 8:49 pm

hmmm take a look at the sat.. not gone yet..
http://www.ssd.noaa.gov/goes/east/tatl/loop-rgb.html
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Re: Low Pressure in Western Atlantic

#56 Postby floridasun78 » Fri Sep 13, 2013 9:05 pm

it look shear high and dry air that why nhc drop it forecast dont look good for it
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Re: Low Pressure in Western Atlantic

#57 Postby Aric Dunn » Fri Sep 13, 2013 9:07 pm

floridasun78 wrote:it look shear high and dry air that why nhc drop it forecast dont look good for it


yeah they did but out of the last couple days its looked better today . i bet it shows up again at 2 or 8am if convection stays
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Re: Low Pressure in Western Atlantic

#58 Postby floridasun78 » Fri Sep 13, 2013 9:20 pm

Aric Dunn wrote:
floridasun78 wrote:it look shear high and dry air that why nhc drop it forecast dont look good for it


yeah they did but out of the last couple days its looked better today . i bet it shows up again at 2 or 8am if convection stays

ture early today gfs show it as maybe td north of leedwards by next week
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Re: Low Pressure in Western Atlantic

#59 Postby TheEuropean » Sat Sep 14, 2013 6:44 am

For me it's looking better today:

Image
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#60 Postby HURAKAN » Sat Sep 14, 2013 6:48 am

Image

strong shear
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