MikeCAdministrator
(Admin)
Sat Jul 16 2011 09:45 PM
Tropical Storm Bret Losing Strength,Moving Away from US

7:00 AM EDT Update 19 July 2011
Bret has been losing strength since mid last night, working in dry air from the north, keeping the system from developing much new convection.

The forecasted motion to the northeast is continuing, and now with no watches/warnings advisories will come every 6 hours. At 5 AM, 11AM, 5PM and 11PM. On the forecast track it moves between the Carolinas and Bermuda, being no real factor for either.

The opportunity for Bret to become a hurricane has passed as well,

Outside of Bret, low chance areas include the area east of the Caribbean (Not Likely to develop), a wave in the Central Atlantic around 35 west (one to watch late this week), and another area northeast of Puerto Rico (Not likely to develop).

6:30 AM EDT Update 18 July 2011
Tropical Storm Bret is still generally moving slowly, currently toward the east at 3mph, it is forecast to meander a bit more and eventually head north to north northeast and then curve out to sea.

Overnight it has gained a bit of strength and has conditions favorable enough that it may form into the year's first hurricane later tonight or tomorrow. There is a fairly good model consensus on the system staying out to sea, Even though odds are highly against it making landfall (or even getting close) to the Carolinas, but it may be a good idea to check back over the next two days to see if the trends out to sea continue.

Dry air will likely begin to affect Bret later in the week which will likely keep it from strengthening too much. After 3 days or so conditions get hostile for the system.



Outside of Bret, there doesn't seem to be much going on. The only long shot place to look for systems later this week may be east of the Caribbean. Outside of Bret and that there really is not much going on in the Atlantic Tropics.

8:00 PM EDT Update 17 July 2011
Tropical Depression Two has been upgraded to Tropical Storm Bret.

6:00 PM EDT Update 17 July 2011
A new recon report supports Tropical Storm force winds, it is likely that Tropical Storm Bret will form with the next advisory (around 8PM).

4:45 PM EDT Update 17 July 2011
98L has strengthened to Tropical Depression two. The official forecast keeps it offshore of Florida, and based on what has occurred today there is very little reason to disagree with in the NHC's track. It is still worth monitoring over the next few days.

2 PM EDT Update 17 July 2011
At 2PM the National Hurricane Center upgraded chances of 98L to 40% for development within the next 48 hours, and recon aircraft currently is near the west coast of Florida and heading toward the system.

The system is looking impressive on visible satellite, but not so much on the infrared as it is losing some convection there. Dry air is approaching the central Florida area, and may help keep the system weak This may keep it holding the rest of the day. More should be known when recon reaches the area.

8 AM EDT Update 17 July 2011
The wave east of Florida has organized overnight and chances are indicated to be 30% development over the next two days. Recon is scheduled to investigate the area today, and because of close proximity to land, it is expected that it will fly.

The system currently is drifting southward toward the Bahamas. Global models are having a hard time picking up on jt because of the relatively small size of the system. It is expected to continue to move very slowly for at least the next 48 hours before the ridge has a chance to begin to affect it. There is a window for the system to move westward at that time, if the ridge misses it, and if so conditions in the upper levels could be slightly unfavorable for the system. That said, the proximity to land leaves little room for error, so it must be watched closely over the several days. Another scenario, is that it does get picked up it could draw it further northward toward the Carolinas, but still stay offshore. The scenario In between is that it would drift over the coast of Florida briefly before heading northeastward.



These small systems can change in strength rapidly, and with apparent hot towers forming in the low, and a good overall low level flow, the stage is set for something to pop up relatively quickly.

Although the prevailing though is that it will eventually move to the northeast and out to sea, it still has a lack of general steering currents around it, and needs to be watched, especially in the Bahamas, but by Florida as well over the next few days.

If the current trend persists through the day, it is possible for development to occur sooner than anticipated. The recon flight out today should help with this.

Bottom line, even though it is likely not to affect Florida directly, and despite the generally not favorable environment, small systems like these can change quickly, and the margin of error is low, so it is a good idea to keep updated on it.

Beyond, 98L a wave in the far eastern Caribbean, near the islands, seems to be organizing as well.

{{EastFloridaRadar}}

{{StormLinks|Bret|02|2|2011|1|Bret}}

{{StormLinks|99L|99|3|2011|2|99L}}

Original Update
An area of disturbed weather off the east central Florida coastline (98L) is being watched this afternoon, it is from the cut off Frontal area mentioned last week.

Conditions could be more favorable for development into next week. Those along the east Florida coastline and the Bahamas will want to watch this for much needed rainfall. From the current pattern, however, it will meander for several days but most likely stay out to sea.

The current drift is slight toward the south southeast, but there isn't much to steer it, leaving it hanging around probably through most of the upcoming week. The proximity to the east coast of Florida will make it worth watching over the next week, but the probability of anything happening with the system is currently low.


MikeCAdministrator
(Admin)
Sun Jul 17 2011 01:57 AM
Re: Watching 98L Off East Florida Coastline

If the system off Florida (98L) persists like it has so far tonight into tomorrow the chances for development will likely go up tomorrow. There is a recon flight scheduled for tomorrow out there.

This was from the system that was talked about last week moving off the Carolinas, it looked like the chances fell apart, but a small area persisted through the days and now is manifesting itself off Cape Canaveral.

These systems that pop up close to land are called "home brew" style systems, and can come up relatively quickly and surprise folks. This morning the system wasn't even really worth mentioning, but it changed by the afternoon.

The models are still a bit to scattered and early to use them for much of anything.


Edski
(Verified CFHC User)
Sun Jul 17 2011 12:22 PM
Re: Watching 98L Off East Florida Coastline

NHC says 30% chance now. Looking at the model plots, all 3 BAM's seem to want to truck this down the I-4 corridor. While we certainly could use the rain, and I would not expect this to get too serious if it did go that way.
Looking at the most recent IR loop, I might be imaging things, but it looks like the recent blow up of clouds/precip just off the FLA east coast is accompanied by a nearly symmetric region of downlift across central and west FLA. Right now here in the Tampa area it's a really nice morning...


danielwAdministrator
(Moderator)
Sun Jul 17 2011 01:15 PM
Re: Watching 98L Off East Florida Coastline

Right now the system is moving in a Southerly direction and that throws almost all of the models out. At least the 00Z models from last night.
The following comment is Forecast Lounge material. I place it here to tie into Edski's post. Mike and Ed feel free to move it.

The current models seem to have split. Motions are west, north and east.
BAMD is probably picking up on the upper ridge currently over the Midwest moving into the SE US in a few days. Deflecting 98L to the west. GFDL wants to skirt the ridge, against the flow, and head for the NC Coast. LBAR is off to the NW, toward Jacksonville, and HWRF is a fish spinner.

If the system were to move west it's chances of intensifying in the short term, would/ should be less than in the other directions.
Based on an overland track! A few systems in the past have intensified over Southern Florida


MikeCAdministrator
(Admin)
Sun Jul 17 2011 01:27 PM
Re: Watching 98L Off East Florida Coastline

I put some further thoughts in the forecast lounge, since it's more speculation than anything.

The models aren't handling it very well, and probably won't until the recon data gets in there and the system develops more. The models may be a bit more interesting tomorrow after the (0Z) night run.


danielwAdministrator
(Moderator)
Sun Jul 17 2011 01:28 PM
Re: Watching 98L Off East Florida Coastline

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
230 AM EDT SUN JUL 17 2011

MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA
AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. (edited~danielw)

...THE RIDGE WILL BE REINFORCED BY STRONGER HIGH PRES OFF THE
MID-ATLC COAST THAT BEGINS TO BUILD SW ACROSS N FLORIDA AND INTO
THE NE GULF THROUGH...AND INTO EARLY NEXT WEEK BEFORE WEAKENING
AS A TROUGH E OF CENTRAL FLORIDA AND DRIFTS WESTWARD...

...AS FOR THE FORECAST...THE STATIONARY FRONT WILL GRADUALLY LOSE
ITS IDENTITY OVER THE NEXT FEW DAYS AS IT PUSHES BACK TO THE N.
THE RIDGE WILL LIFT SLIGHTLY NWD THROUGH THU. THE LOW IS FORECAST
BY THE DYNAMICAL MODELS TO MOVE S THROUGH TONIGHT...THEN BEGIN
TO TRACK MORE TO THE W AND NW MON AND MON NIGHT AND TURN NE TUE
BEFORE LOSING ITS IDENTITY OVER THE FAR NW PORTION. THE
HURRICANE BAM MODELS TAKE THE LOW MORE TO THE SW AND W TOWARDS
CENTRAL FLORIDA OVER THE NEXT 36-48 HOURS. WILL FORECAST LOW TO
APPROACH THE CENTRAL FLORIDA COAST THROUGH MON NIGHT INTO
TUE...THEN CARRY A TROUGH FEATURE EXTENDING TO PART OF CENTRAL
FLORIDA LATER TUE INTO WED. THERE IS A CHANCE FOR THIS FEATURE
TO BECOME A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. STAY
TUNED FOR ANY POSSIBLE NEW INFORMATION ON THIS SYSTEM...

Marine Weather Discussion from NHC


vineyardsaker
(Weather Guru)
Sun Jul 17 2011 01:29 PM
Re: Watching 98L Off East Florida Coastline

Quote:

These systems that pop up close to land are called "home brew" style systems, and can come up relatively quickly and surprise folks. This morning the system wasn't even really worth mentioning, but it changed by the afternoon.




Yes, I remember a couple of years ago we had one of these small "irrelevant" systems right off our coastline which turned info a tropical storm (or was it a Cat1?) literally overnight and everybody was baffled as to where the hell it had come from.

So far, and even though 98L is right off our coast, we don't feel much here, in New Smyrna Beach. West Palm Beach seems to be even closer to the system than we are.


MikeCAdministrator
(Admin)
Sun Jul 17 2011 01:34 PM
Re: Watching 98L Off East Florida Coastline

Quote:

Quote:

These systems that pop up close to land are called "home brew" style systems, and can come up relatively quickly and surprise folks. This morning the system wasn't even really worth mentioning, but it changed by the afternoon.




Yes, I remember a couple of years ago we had one of these small "irrelevant" systems which turned info a tropical storm (or was it a Cat1?) literally overnight and everybody was baffled as to where the hell it had come from.

So far, and even though 98L is right off our coast, we don't feel much here, in New Smyrna Beach. West Palm Beach seems to be even closer to the system than we are.




That was likely Humberto from 2007, it spun up from a disturbance to category one in nearly record time. Conditions aren't set up for something like that with the system off Florida, (Too much northwesterly shear), but it can be possible given the right conditions.


danielwAdministrator
(Moderator)
Sun Jul 17 2011 01:58 PM
Wave approaching Grenada

Not to take anyone away from 98L as it's very close to home.

Two separate weather stations in the far SE Caribbean are reporting sustained tropical storm force winds for the last hours.
Station located at Fort Wells, Grenada has reported winds above 34 mph for the last 61 minutes with peak wind gust to 64 mph.
These measurements are associated with a tropical wave moving into the Grenada area at this time.


typhoon_tip
(Meteorologist)
Sun Jul 17 2011 03:32 PM
Re: 98L Continues to Organize Off East Florida Coastline

Low-level cumulus streets are curving inward in cyclonic fashion over the eastern Penn of Florida.

U/A wind overlays show a bit of shear in the area, but with heights generally forecast to rise synoptically N of the region therein is a natural tendency for reducing shear in time, particularly if the system moves SW with the environmental flow.

Looks like a nice frontalysis "bookend" wave scenario on satellite.


MikeCAdministrator
(Admin)
Sun Jul 17 2011 05:59 PM
Re: 98L Continues to Organize Off East Florida Coastline

At 2PM the National Hurricane Center upgraded chances of 98L to 40% for development within the next 48 hours, and recon aircraft currently is near the west coast of Florida and heading toward the system.

The system is looking impressive on visible satellite, but not so much on the infrared as it is losing some convection there. Dry air is approaching the central Florida area, and may help keep the system weak This may keep it holding the rest of the day. More should be known when recon reaches the area.


danielwAdministrator
(Moderator)
Sun Jul 17 2011 06:37 PM
Re: 98L Continues to Organize Off East Florida Coastline

RECON has just passed over ED's house and is on the initial Inbound leg.
Highest winds so far are in the 15 mph range. Estimating 30 minutes to their Center Fix.

Update: 2:41PM EDT
Optional Data...
Estimated Surface Wind: From 80° at 30 knots (From the E at ~ 34.5 mph)
Remarks Section...
Surface Wind Speed (likely by SFMR): 31 knots (~ 35.7mph)

data courtesy of tropicalatlantic.com


MikeCAdministrator
(Admin)
Sun Jul 17 2011 06:54 PM
Re: 98L Continues to Organize Off East Florida Coastline

Recon's not hit the "center" of the system yet, but some banding features are starting to show up on the Melbourne long range radar.

danielwAdministrator
(Moderator)
Sun Jul 17 2011 07:08 PM
Re: 98L Continues to Organize Off East Florida Coastline

That's consistent with the recon data:
Location: 142 miles (229 km) to the E (90°) from Melbourne, FL, USA. This was near the first wind shift. But it's on the western edge of the main cloud pattern. Multiple vortice system??
Wind switched from NE to E to SE in less than 17 miles. Wind speeds from the SE direction are consistent with a NE Quadrant measurement. I.e. greater speeds.

Recon has turned north. So they are still looking for the Center. At the turn:
Optional Data...
Estimated Surface Wind: From 120° at 30 knots (From the ESE at ~ 34.5 mph)
Remarks Section...
Surface Wind Speed (likely by SFMR): 29 knots (~ 33.4mph)


MikeCAdministrator
(Admin)
Sun Jul 17 2011 07:17 PM
Re: 98L Continues to Organize Off East Florida Coastline

There are signs already from radar and recon sfmr that it may be upgraded to a depression shortly. It will be borderline for the NHC to call, and generally this close to land, they will call for an upgrade. More will be know probably with a second recon pass coming up.

WeatherNut
(Weather Master)
Sun Jul 17 2011 07:50 PM
Re: 98L Continues to Organize Off East Florida Coastline

Looks like we have a center at 27 35'/ 78 15' also 2 readings of 46 and 49 mph winds on the north side. Pressure here is 1010mb which is the lowest I've seen so far...definite wind shift in this area

MikeCAdministrator
(Admin)
Sun Jul 17 2011 07:54 PM
Re: 98L Continues to Organize Off East Florida Coastline

It's looking very likely that TD#2 (perhaps Bret) will form at 5 from those readings. Recon found westerly winds around 30- to 35 knots. So virtually no question that is at least a depression, and the NHC may call it a Tropical Storm based on the 40s the plane found.

The good news is that is looking more likely to stay away from the mainland then it did this morning.



MikeCAdministrator
(Admin)
Sun Jul 17 2011 08:13 PM
Re: 98L Continues to Organize Off East Florida Coastline

The upgrade is coming, NHC Will begin advisories on the system shortly.

LoisCane
(Veteran Storm Chaser)
Sun Jul 17 2011 08:15 PM
Re: 98L Continues to Organize Off East Florida Coastline

Hey they rarely send in planes with 40% chances ... although it is close to land. Once we get some good data from recon we can get a better picture of where it might go IF it forms.

vineyardsaker
(Weather Guru)
Sun Jul 17 2011 08:19 PM
Re: Watching 98L Off East Florida Coastline

Quote:

That was likely Humberto from 2007, it spun up from a disturbance to category one in nearly record time.




Yes, I think that this was the one, and it was in September. Thanks for the pointer


danielwAdministrator
(Moderator)
Sun Jul 17 2011 08:22 PM
Re: Watching 98L Off East Florida Coastline

It's very likely that Advisories on Tropical Depression 2 will begin at 4 PM EDT.
Recon found winds above tropical storm force at flight level and on the surface. We are just waiting on NHC to say it's a depression.
Left sidebar has updated and that I believe is automatic.

ATCF coding. It's a duck/ depression.


Hugh
(Senior Storm Chaser)
Sun Jul 17 2011 08:25 PM
Re: Watching 98L Off East Florida Coastline

Quote:

It's very likely that Advisories on Tropical Depression 2 will begin at 4 PM EDT.
Recon found winds above tropical storm force at flight level and on the surface. We are just waiting on NHC to say it's a depression.
Left sidebar has updated and that I believe is automatic.
ATCF coding. It's a duck/ depression.




If they found winds > t.s. force at the surface, it won't be T.D. 2, it'll be T.S. Bret.

New model runs seem to take Bret directly out to sea, though. So much for much-needed rain.


danielwAdministrator
(Moderator)
Sun Jul 17 2011 08:29 PM
Re: Watching 98L Off East Florida Coastline

Good point Hugh. The coding has replaced INVES with TWO. Would that be TD 2 or Storm 2?

Hugh
(Senior Storm Chaser)
Sun Jul 17 2011 08:32 PM
Re: Watching 98L Off East Florida Coastline

TWO would indicate that it's a depression - which would indicate that they aren't going to listen to recon reports of T.S. winds at the surface. Or that they haven't confirmed the winds yet?

Finally see a vortex from Google Earth (1010mb), but without T.S. winds (pretty weak, in fact, 27.5 mph).

Update: Advisory is out on TWO. No threat to U.S.


danielwAdministrator
(Moderator)
Sun Jul 17 2011 08:38 PM
98L now Tropical Depression Two

The Weather Channel is reporting NHC upgraded 98L to Tropical Depression 2.
Advisories begin shortly.


TROPICAL DEPRESSION TWO FORECAST/ADVISORY NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL022011
2100 UTC SUN JUL 17 2011

THE GOVERNMENT OF THE BAHAMAS HAS ISSUED A TROPICAL STORM WATCH FOR
GRAND BAHAMA ISLAND AND THE ABACO ISLANDS IN THE NORTHWEST BAHAMAS.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* GRAND BAHAMA ISLAND AND THE ABACO ISLANDS IN THE NORTHWEST BAHAMAS

TROPICAL DEPRESSION CENTER LOCATED NEAR 27.5N 78.2W AT 17/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE SOUTH OR 180 DEGREES AT 2 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1010 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.


BillD
(User)
Sun Jul 17 2011 09:20 PM
Re: 98L now Tropical Depression Two

New vortex message from recon... pressure down to 1009 and max surface winds at 45kts.

URNT12 KNHC 172108
VORTEX DATA MESSAGE AL982011
A. 17/20:54:00Z
B. 27 deg 30 min N
078 deg 06 min W
C. NA
D. 45 kt
E. 041 deg 25 nm
F. 060 deg 43 kt
G. 041 deg 25 nm
H. EXTRAP 1009 mb
I. 18 C / 178 m
J. 24 C / 178 m
K. 21 C / NA
L. NA
M. NA
N. 1234 / 01
O. 0.02 / 1 nm
P. AF304 01BBA INVEST OB 16
MAX FL WIND 43 KT NE QUAD 20:45:20Z
SLP EXTRAP FROM BELOW 1500 FT
;

Bill


danielwAdministrator
(Moderator)
Sun Jul 17 2011 09:49 PM
Re: 98L now Tropical Depression Two

There is now a 6 degree difference between the Outside Eye temperature and the Inside Eye temperature.
That's a bit of a flag to me. Indicates the system is trying to close up the center.

The difference between the inside temperature and outside temperature is somewhat indicative of how well the vacuum is working. .


WeatherNut
(Weather Master)
Sun Jul 17 2011 11:55 PM
Re: 98L Continues to Organize Off East Florida Coastline

Well, they have upgraded it...It's now Brett

typhoon_tip
(Meteorologist)
Mon Jul 18 2011 01:11 AM
Re: Tropical Storm Bret Form off Florida, Likely No Threat to Mainland


Another decent satellite and radar source can be found here: http://weather.cod.edu/satrad/index.php

On the left hand pane, click the 1 or 2km product link, and then click the geographic bullet of interest. There is an embedded radar from the Bahamas that shows the cyclonic reflectivity of Brett.


danielwAdministrator
(Moderator)
Mon Jul 18 2011 12:25 PM
Tropical Storm Bret

Really nice? outflow being established over Bret.



Bret is being pushed slowly to the east by the ridge moving in from the north. Seen in the below picture as the orange tinted dry air. To the east of Bret appears to be an upper level low, ULL.



adam s
(Verified CFHC User)
Mon Jul 18 2011 01:56 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Does anyone think Brett will become a hurricane later today? It is really looking good on radar.

danielwAdministrator
(Moderator)
Mon Jul 18 2011 02:05 PM
Re: Tropical Storm Bret Slowly Strengthening

NHC probabilities for Bret becoming a hurricane are around 20% thru Noon EDT Tuesday.
Based on the latest NHC Advisory.
http://www.nhc.noaa.gov/text/refresh/MIAPWSAT2+shtml/180835.shtml

Outflow is increasing over the storm and early indications of a possible equatorial outflow channel have just begun to appear in the visible satellite photos.


weathernet
(Storm Tracker)
Mon Jul 18 2011 03:59 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Given the small size and stature of Bret, and given a short term relaxing of upper air conditions, it would not at all seem unrealistic for some renewed bursting of the convection to aid inflow enough for the system to aquire short term Hurricane status. These "micro-canes" tend to be able to wind up ( and just as easily fall prey ) to minute and local conditions.

doug
(Weather Analyst)
Mon Jul 18 2011 07:24 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Is The BAMD outlier track too far off to be credible? Did the system wobble to the NW? see latest visible loop. Is the eastern edge of the mid-west centered ridge capable of blocking and then shunting the system back to the west? See WV loop. Just asking.

WeatherNut
(Weather Master)
Mon Jul 18 2011 07:46 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Recon has found 996mb pressure which is down 4mb from 2p advisory. Also a couple of 60+mph winds and they just reached the center

MikeCAdministrator
(Admin)
Mon Jul 18 2011 07:49 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

It has a good shot at reaching hurricane strength tonight, probably by the 8PM or 11PM advisory, at least forecast to do so at 5PM. It is really getting its act together right now as it may be forming an eyewall (Just look at the southern side on satellite imagery)

It looks to be no real threat to the US or Bermuda, though. The Bam models are no good for a strengthening system like this (perhaps a much weaker one)


danielwAdministrator
(Moderator)
Mon Jul 18 2011 08:02 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Quote:

Recon has found 996mb pressure which is down 4mb from 2p advisory. Also a couple of 60+mph winds and they just reached the center




996mb gives a Max Possible Intensity of 79 mph under ideal conditions.
Bret doesn't appear to be under ideal conditions, but the conditions are improving.

July 18th is a bit early for a Hurricane. And in close proximity to land.


URNT12 KNHC 182041
VORTEX DATA MESSAGE AL022011
A. 18/19:29:50Z
B. 28 deg 09 min N
077 deg 04 min W
C. 850 mb 1406 m
D. 60 kt-- estimated surface wind speed
E. 271 deg 11 nm
F. 005 deg 53 kt
G. 269 deg 10 nm
H. 997 mb
I. 16 C / 1530 m
J. 21 C / 1522 m
K. 15 C / NA
L. OPEN N-E-S
M. C18- eye diameter( elliptical at this time )
N. 12345 / 8
O. 0.02 / 3 nm
P. AF307 0302A BRET OB 04
MAX FL WIND 53 KT W QUAD 19:26:30Z
MAX OUTBOUND FL WIND 62 KT SE QUAD 19:39:10Z


tcatron565
(Registered User)
Tue Jul 19 2011 12:26 AM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Brett is strengthening pretty quickly. Even though it most likely won't affect any land, it could become a category one hurricane. It may affect Bermuda on Friday, but that's if it shifts to the south a bit, which it doesn't look to do.

cieldumort
(Moderator)
Tue Jul 19 2011 06:25 AM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

As of 2AM EDT, Bret has been having the wind knocked right out of him by his ongoing battle with dry air in the region. This steady and rather rapid erosion has been the trend ever since the cyclone started developing a ragged eyewall. Rather than enjoying a burst of renewed convection overnight, yet more dry air has continued taking a toll on what remains.

There is now a substantially increasing chance that Bret will merely degenerate into just a shallow, low-level swirl relatively soon- northerly shear is already now affecting the cyclone, is set to steadily increase over the next 48 hours, and at this rate, degeneration into a remnant low could happen as early as later today. Nonetheless, this is not yet the official forecast from the NHC, and even should the cyclone degenerate, often blustery winds and intermittent heavy showers can continue for some time until a system has either completely wound down, and/or become absorbed by something else.


Rich B
(British Meteorologist)
Tue Jul 19 2011 04:42 PM
Re: Tropical Storm Bret Slowly Strengthening, Moving Away from US

Bret looks to be past his best now, and is rapidly losing deep convection.

Visible imagery though shows an interesting development just north of Bermuda with a low pressure area developing along the same old frontal boundary that spawned Bret...



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