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Recon is heading into #92L and it is possible Advisories begin later this morning for NE FL to the SE US coast.
Days since last H. Landfall - US: Any 296 (Idalia) , Major: 296 (Idalia) Florida - Any: 296 (Idalia) Major: 296 (Idalia)
22.3N 102.0W
Wind: 30MPH
Pres: 1000mb
W at 24 mph
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#1108664 (Received by flhurricane at: 4:56 AM 24.Sep.2022)

Tropical Storm Ian Discussion Number 5
NWS National Hurricane Center Miami FL AL092022
500 AM EDT Sat Sep 24 2022

Ian is still being affected by some north-northeasterly, however
short-wave infrared imagery suggests that the center is located
beneath the eastern edge of the colder convective cloud tops.
Deep convection over the western portion of the circulation has
increased overnight but there is still little banding evident in
conventional satellite imagery. Subjective Dvorak satellite
classifications from TAFB and SAB, and objective estimates from
UW-CIMSS have changed little this cycle, but given that the center
is more involved with the deep convection, the initial intensity
has been increased to 40 kt, which is between the objective
estimates and a TAFB Dvorak T-number of 3.0 or 45 kt. A NOAA
Hurricane Hunter aircraft is scheduled to investigate Ian this
morning, and should provide additional data on Ian's structure
and intensity.

Recent satellite fixes indicate that Ian has turned westward
(270/12 kt) overnight to the south of a narrow ridge centered
near Hispaniola. By early Sunday, Ian is expected to reach the
western portion of the ridge, and the storm should turn
west-northwestward, and then northwestward over the northwestern
Caribbean in 36 to 48 hours. After that time, Ian is forecast to
turn north-northwestward and northward around the western portion
of the ridge. This will bring Ian near or over Western Cuba and
into the southeastern Gulf of Mexico. Late in the period, the
guidance indicates the storm will begin to recurve toward Florida.
As mentioned before, the track models are in general agreement with
this scenario, however there is a large amount of cross-track
spread at 72 hours and beyond. In fact, the east-west spread in
the guidance at 96 hours is about 180 n mi, with the CTCI and ECMWF
along the eastern side of the envelope, and the GFS, HWRF, and GFS
ensemble mean along the western side. The overall guidance
envelope has shifted slightly westward this cycle, and the NHC
track has been nudged in that direction and lies just east of the
various consensus aids. Given the spread in the guidance, and
the still shifting dynamical models, additional adjustments to the
track forecast may be needed in subsequent advisories. Users are
reminded that the long-term average NHC 4- and 5-day track errors
are around 150 and 200 n mi, respectively.

The shear that has been plaguing Ian is forecast to continue to
decrease over the next day or two while the cyclone moves over the
warm waters of the central and northwestern Caribbean Sea. This
should allow for strengthening, with steady to rapid
intensification (RI) quite possible once an inner core becomes
established. Although the updated NHC forecast is just shy of
forecasting RI (30 kt or greater increase over 24 h) during any 24-h
period over the next few days, it calls a 45-kt increase in wind
speed between 24 and 72 hours, and Ian is likely to be near major
hurricane intensity when it approaches western Cuba. Since Ian is
not expected to remain over Cuba long, little weakening is expected
due to that land interaction, and the forecast again shows Ian as a
major hurricane over the eastern Gulf when it is approaching the
west coast of Florida.

Key Messages:

1. Ian is expected to produce heavy rainfall and instances of
flash flooding and possible mudslides in areas of higher terrain,
particularly over Jamaica and Cuba.

2. Hurricane conditions are possible in the Cayman Islands by
early Monday, with tropical storm conditions possible by late
Sunday. Tropical storm conditions are possible in Jamaica on

3. Early next week, Ian is forecast to move near or over western
Cuba as a strengthening hurricane and then approach the Florida
peninsula at or near major hurricane strength, with the potential
for significant impacts from storm surge, hurricane-force winds,
and heavy rainfall. While it is too soon to determine the
exact magnitude and location of these impacts, residents in Cuba,
the Florida Keys, and the Florida peninsula should ensure they have
their hurricane plan in place and closely monitor forecast updates
through the weekend.


INIT 24/0900Z 14.7N 73.5W 40 KT 45 MPH
12H 24/1800Z 14.6N 75.2W 45 KT 50 MPH
24H 25/0600Z 15.2N 77.4W 50 KT 60 MPH
36H 25/1800Z 16.5N 79.4W 60 KT 70 MPH
48H 26/0600Z 18.2N 81.0W 70 KT 80 MPH
60H 26/1800Z 20.2N 82.4W 85 KT 100 MPH
72H 27/0600Z 22.0N 83.3W 95 KT 110 MPH
96H 28/0600Z 25.5N 83.3W 100 KT 115 MPH
120H 29/0600Z 28.2N 82.1W 85 KT 100 MPH...INLAND

Forecaster Brown