cieldumort
Moderator
Reged: Mon
Posts: 2132
Loc: Austin, Tx
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Invest 95L has a very strong chance of developing. now up to 70% (and rising).
Quote:
Widespread cloudiness and showers extending from the southeastern
Bahamas northward over the southwestern Atlantic for a few hundred
miles are associated with a sharp trough of low pressure. Although
limited development of this system is anticipated tonight and
Thursday, conditions are forecast to become a little more conducive
for tropical cyclone formation over the weekend, and a tropical
depression is likely to form as the system moves slowly toward the
west-northwest across the Florida Straits and southeastern Florida,
and into the eastern Gulf of Mexico. This disturbance will likely
produce periods of locally heavy rainfall and gusty winds across the
Bahamas through Friday, and across Florida during the weekend. An
Air Force Reserve reconnaissance aircraft is scheduled to
investigate the system Thursday afternoon, if necessary.
* Formation chance through 48 hours...medium...50 percent.
* Formation chance through 5 days...high...70 percent.
PTC 9 became Humberto tonight, Sep 13th, and the title has been updated accordingly - Ciel
Edited by cieldumort (Mon Sep 16 2019 07:24 PM)
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hurricanetracker
Verified CFHC User
Reged: Sun
Posts: 18
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What is the chance of this storm hitting Mobile or New Orleans and how strong could it get?
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OrlandoDan
Weather Master
Reged: Mon
Posts: 415
Loc: Longwood, FL
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I am having a tough time with comparing the to the Euro. The Euro seems to have a decently strong depression going up the Atlantic Seabord while the shows a much weaker system lollygagging into the gulf.
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Keith (1988), Charley (2004), Frances (2004) , Jeanne (2004), Fay (2008), Mathew (2016), Irma (2017), Dorian (2019)
Personal Weather Station: https://www.wunderground.com/dashboard/pws/KFLLONGW67
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doug
Weather Analyst
Reged: Mon
Posts: 1006
Loc: parrish,fl
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The aircraft data should clarify the situation by this evening and the 8 p.m. official advisory give us some guidance
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doug
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Genesis
Weather Guru
Reged: Wed
Posts: 125
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Quote:
What is the chance of this storm hitting Mobile or New Orleans and how strong could it get?
IMHO the upper air pattern (look at WV) doesn't support much of a chance of it coming that way; it has moved more-or-less NW (it WAS moving WNW for a while) which argues strongly that it will miss the slot that will allow it into the Gulf. (See here -- look at the UV loop https://weather.msfc.nasa.gov/GOES/) -- that feature is moving slowly westward, and that could admit this into the eastern Gulf as it backs away, but I wouldn't put much faith in anything coming much further west than the Big Bend area, and the dry air wrapped around it is also likely to inhibit strengthening of anything that comes westward as well.
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Keith B
Weather Hobbyist
Reged: Sun
Posts: 50
Loc: FL, Orange County
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NHC will be starting PTC 9 at 1700.
" target="_blank">NHC TWITTER LINK PTC 9
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Keith Boyer N4TRN
Orange County ARES
Asst. Emerg. Coord. (AEC) Skywarn Orange County, FL
http://www.ocares.org/
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OrlandoDan
Weather Master
Reged: Mon
Posts: 415
Loc: Longwood, FL
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TWC discussing right now my point above about the extreme differences in the vs the Euro.
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Keith (1988), Charley (2004), Frances (2004) , Jeanne (2004), Fay (2008), Mathew (2016), Irma (2017), Dorian (2019)
Personal Weather Station: https://www.wunderground.com/dashboard/pws/KFLLONGW67
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MissBecky
Weather Guru
Reged: Thu
Posts: 112
Loc: Ft. Myers, FL
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Levi’s latest video on Tropical Tidbits does a good job of explaining the differences between the two models, and when we can expect to know more.
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MikeC
Admin
Reged: Sun
Posts: 4439
Loc: Orlando, FL
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9 seems to be starting to get organized this morning, a lot of convection and hot tower activity. Curious since the models that have it getting stronger keep it further offshore, but unfortunately impact the Bahmas more. The hates doing advisories on undeveloped systems for this reason, but the euro seems to have a handle on the current state of 9 fairly well.
Lounge prediction (I.e. just opinion) It'll likely be another close call, but the center of 9 probably will stay east of Florida. Beyond that it may stall over the ocean and do a small loop before going out to sea.
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IsoFlame
Weather Guru
Reged: Wed
Posts: 197
Loc: One block off the Atlantic Oce...
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Regardless of the ultimate track of the yet to form center of circulation, the pressure gradient between high pressure over the western Atlantic and 9's trough-elongated wind field are likely to exacerbate the system's coastal erosion impact along Florida's east coast- especially considering the Dorian-battered beach and the full moon Saturday.
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CoCoRaHS Weather Observer (FL-VL-42) & Surf Forecaster: https://www.surf-station.com/north-florida-surf-forecast-3/
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JMII
Weather Master
Reged: Thu
Posts: 423
Loc: Margate, Florida
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Quote:
Regardless of the ultimate track of the yet to form center of circulation, the pressure gradient between high pressure over the western Atlantic and 9's trough-elongated wind field are likely to exacerbate the system's coastal erosion impact along Florida's east coast- especially considering the Dorian-battered beach and the full moon Saturday.
This gradient is pretty evident here in NW Broward has its been pretty windy for the last day or so. Normally summer in S FL has nothing but very light SE winds but we have been getting steady NE wind @ 10, with gusts to 20. Overall weekly pressure has been slowly moving down too.
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South FL Native... experienced many tropical systems, but actually had to put up the panels for:
David ('79) - Floyd ('87) - Andrew ('92) - Georges ('98) - Frances ('04) - Wilma ('05) - Matthew ('16) - Irma ('17)
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IsoFlame
Weather Guru
Reged: Wed
Posts: 197
Loc: One block off the Atlantic Oce...
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Area Forecast Discussion
National Weather Service Melbourne FL
330 PM EDT Fri Sep 13 2019
.DISCUSSION...
Wind gusts of 30 to 35 mph will be possible in heavier showers and a few storms, mainly
along the coast as the marine sourced activity moves ashore. Envelope of winds directly ascd with the
cyclone circulation remain offshore the local ATLC coast at this time, and stronger winds ascd with squalls and onshore moving showers will remain gusty at times. Expect coastal effects in the form of beach erosion, locally heavy rain, rough surf/hazardous open water marine conditions to be the main issues.
.MARINE...
Marine conditions will remain hazardous through the weekend. Awaiting forecast update at 5 PM for more specific information.
HOURLY WEATHER ROUNDUP AROUND FLORIDA
NATIONAL WEATHER SERVICE OFFICE MELBOURNE FL
400 PM EDT FRI SEP 13 2019
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MELBOURNE FAIR 88 75 65 NE21G31 29.98F
FORT PIERCE FAIR 85 74 69 NE14G24 29.96F
ORLANDO INTL PTSUNNY 86 72 62 NE20G30 30.00F
DAYTONA BEACH PTSUNNY 87 75 67 NE22 30.04F
VERO BEACH FAIR 88 75 65 NE21G30 29.97F
STUART MOSUNNY 84 73 70 E22G32 29.96F
WEST PALM BCH PTSUNNY 88 75 65 NE25G32 29.93F
MIAMI CLOUDY 87 75 67 NE17G25 29.90S
KEY WEST FAIR 86 76 71 E12G20 29.88F
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CoCoRaHS Weather Observer (FL-VL-42) & Surf Forecaster: https://www.surf-station.com/north-florida-surf-forecast-3/
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Psyber
Storm Tracker
Reged: Fri
Posts: 209
Loc: Ontario, Canada
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Quote:
Area Forecast Discussion
National Weather Service Melbourne FL
330 PM EDT Fri Sep 13 2019
.DISCUSSION...
Wind gusts of 30 to 35 mph will be possible in heavier showers and a few storms, mainly
along the coast as the marine sourced activity moves ashore. Envelope of winds directly ascd with the
cyclone circulation remain offshore the local ATLC coast at this time, and stronger winds ascd with squalls and onshore moving showers will remain gusty at times. Expect coastal effects in the form of beach erosion, locally heavy rain, rough surf/hazardous open water marine conditions to be the main issues.
GFS is tracking where it should be finally with the UK still following basically the same. Essentially the possibility of intensification in warm waters and its slow enough speed however Florida doesn't look to be getting more than t-storm bands.
It's sitting at 1004 mb which means that the low isn't that low. Normal is about 1013 so even though it has organized into a storm, it's not firing deep hot towers of thunderstorms with cold heads to really cause convection/intensification.
My personal forecast is this little beastie is mostly a fish spinner other than going at Bermuda and possibly being a hurricane when it's there. It's being forced into colder water, it doesn't have stronger weather to even fight back against a little high so the Sea Lions...Tiger Fish and... and bears (oh my) will get a little topsy turvy to do some tricks in but not much more.
Obviously, something to be avoided if you're a ship-based asset and paying attention to by Bermuda because has it almost dead to rights in its cone. I don't see it having the strength to make it very dangerous to Bermuda though unless there is more in the SST's than NOAA is able to report. The forward N N/E speed will have sped up considerably so even if it hits Bermuda it'll be a short lived event.
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OrlandoDan
Weather Master
Reged: Mon
Posts: 415
Loc: Longwood, FL
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A decent blob of convection is being picked up on Melbourne,FL radar
--------------------
Keith (1988), Charley (2004), Frances (2004) , Jeanne (2004), Fay (2008), Mathew (2016), Irma (2017), Dorian (2019)
Personal Weather Station: https://www.wunderground.com/dashboard/pws/KFLLONGW67
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Psyber
Storm Tracker
Reged: Fri
Posts: 209
Loc: Ontario, Canada
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Quote:
A decent blob of convection is being picked up on Melbourne,FL radar
Almost an eye at the 1730UTC visible but its weak and hidden by upper level clouds still. I don't think it's time yet for intensification to a hurricane. Pressure still high, wind creeping up but still just a TS.
It's good to see the shift a bit north on Bermuda.
UPDATE
Here comes the intensification. Pressure dropping, winds are 65 and lets be honest, they're probably hitting 70 fairly regularly. Interesting that the track has shifted the two day south a bit yet shifted the abrupt Northward track fairly significantly. Unfortunately it changes nothing for Bermuda as the net result has still kept it dead middle of the track.
Let's hope the strengthening is limited and it stays in the H1 to strong H1 category. Not much in it's way other than fairly warm water now.
Edited by Psyber (Sun Sep 15 2019 02:34 PM)
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IsoFlame
Weather Guru
Reged: Wed
Posts: 197
Loc: One block off the Atlantic Oce...
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There wasn't a 2pm advisory, but Humberto is now a Category 1 hurricane with sustained winds of 85 mph, gusting to 100 mph:
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
202 PM EDT Sun Sep 15 2019
The following information is based on satellite imagery, weather observations, radar and meteorological analysis.
Based on 1200 UTC surface analysis and satellite imagery through 1745 UTC.
...SPECIAL FEATURES...
Tropical Storm Humberto is centered near 28.9N 77.9W at 15/1500 UTC, or 165 nm ENE of Cape Canaveral Florida, moving NNW at 6 kt.Estimated minimum central pressure is 997 mb. Maximum sustained wind speed is 75 kt with gusts to 90 kt. Numerous moderate to scattered strong convection extends outward from the center 100 nm NW quad, from 90 nm NE quad, 80 nm SE quad. On the forecast track, the center of Humberto will continue to move away from the Bahamas and remain well offshore of the east coast of Florida through Wednesday.
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CoCoRaHS Weather Observer (FL-VL-42) & Surf Forecaster: https://www.surf-station.com/north-florida-surf-forecast-3/
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MikeC
Admin
Reged: Sun
Posts: 4439
Loc: Orlando, FL
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That seemed a bit too early, although the 11PM should bump it up to a hurricane. There's been a left hook in some of the models but the storm has taken an easterly jog, it *could* be a pretty close call for Bermuda.
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