Hurricane Ian Public Advisory

WTNT34 KNHC 282057

Hurricane Ian Advisory Number  25
NWS National Hurricane Center Miami FL       AL092022
500 PM EDT Wed Sep 28 2022


LOCATION...26.9N 82.0W


A Storm Surge Watch has been issued north of South Santee River
South Carolina to Little River Inlet.

The Tropical Storm Warning has been extended northward to Surf
City, North Carolina.

A Tropical Storm Watch has been issued from north of Surf City to
Cape Lookout, North Carolina.

The Storm Surge Warning has been discontinued for the Lower Keys
and the Storm Surge Watch has been discontinued for the Middle and
Upper Keys.

The Tropical Storm Warning for the Florida Keys and for Florida Bay
have been discontinued.


A Hurricane Warning is in effect for...
* Chokoloskee to Anclote River, including Tampa Bay
* Sebastian Inlet to Flagler/Volusia County Line

A Storm Surge Warning is in effect for...
* Suwannee River southward to Flamingo
* Tampa Bay
* Flagler/Volusia Line to the mouth of the South Santee River
* St. Johns River

A Tropical Storm Warning is in effect for...
* Indian Pass to the Anclote River
* Flamingo to Sebastian Inlet
* Flagler/Volusia County Line to Surf City
* Flamingo to Chokoloskee
* Lake Okeechobee
* Bimini and Grand Bahama Islands

A Storm Surge Watch is in effect for...
* North of South Santee River to Little River Inlet
* Florida Bay

A Hurricane Watch is in effect for...
* Flagler/Volusia County Line to the South Santee River
* Lake Okeechobee

A Tropical Storm Watch is in effect for...
* North of Surf City to Cape Lookout

A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline, in
the indicated locations. For a depiction of areas at risk, please
see the National Weather Service Storm Surge Watch/Warning Graphic,
available at  This is a life-threatening situation.
Persons located within these areas should take all necessary actions
to protect life and property from rising water and the potential for
other dangerous conditions.  Promptly follow evacuation and other
instructions from local officials.

A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area.  Preparations to protect life and
property should be rushed to completion.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.

A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations during the next 48 hours.

A Hurricane Watch means that hurricane conditions are possible
within the watch area.

A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.

Interests elsewhere in eastern North Carolina should monitor the
progress of Ian.

For storm information specific to your area, please monitor
products issued by your national meteorological service.

At 500 PM EDT (2100 UTC), the eye of Hurricane Ian was located
near latitude 26.9 North, longitude 82.0 West. Ian is moving toward
the north-northeast near 8 mph (13 km/h). On the forecast track,
the center of Ian is expected to move across central Florida
tonight and Thursday morning and emerge over the western Atlantic by
late Thursday.  Ian is forecast to turn northward on Friday and
approach the northeastern Florida coast, Georgia and South Carolina 
coasts late Friday.

Maximum sustained winds have decreased to near 140 mph (220 km/h)
with higher gusts.  Ian is a category 4 hurricane on the
Saffir-Simpson Hurricane Wind Scale.  Further weakening is
expected for the next day or so, but Ian could be near hurricane
strength when it moves over the Florida East coast tomorrow, and
when it approaches the northeastern Florida, Georgia and South
Carolina coasts late Friday.

Hurricane-force winds extend outward up to 50 miles (85 km) from the
center and tropical-storm-force winds extend outward up to 175 miles
(280 km).  A WeatherFlow station in Grove City recently reported 
sustained winds of 95 mph (153 km/h) and a wind gust of 128 mph 
(208 km/h).  A University of Florida Coastal Monitoring 
Program wind tower recently reported sustained winds of 89 mph
(143 km/h) with a gust to 114 mph (183 km/h).

The estimated minimum central pressure is 945 mb (27.91 inches).

Key messages for Ian can be found in the Tropical Cyclone Discussion
under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC and on the
web at

STORM SURGE:  The combination of storm surge and the tide will cause
normally dry areas near the coast to be flooded by rising waters
moving inland from the shoreline.  The water could reach the
following heights above ground somewhere in the indicated areas if
the peak surge occurs at the time of high tide...

* Englewood to Bonita Beach, including Charlotte Harbor...12-18 ft
* Middle of Longboat Key to Englewood...6-10 ft
* Bonita Beach to Chokoloskee...8-12 ft
* Chokoloskee to East Cape Sable...5-8 ft
* Anclote River to Middle of Longboat Key, including Tampa Bay...4-6
* Flagler/Volusia County Line to Altamaha Sound...4-6 ft
* Altamaha Sound to South Santee River...3-5 ft
* Suwannee River to Anclote River...3-5 ft 
* St. Johns River north of Julington...3-5 ft
* St. Johns River south of Julington...2-4 ft
* East Cape Sable to Card Sound Bridge...2-4 ft
* South Santee River to Little River Inlet...2-4 ft
* Patrick Air Force Base to Flagler/Volusia County Line...1-3 ft
* East of Little River Inlet to Cape Lookout...1-3 ft
* Dry Tortugas and Florida Keys...1-3 ft

The deepest water will occur along the immediate coast near and to
the right of the center, where the surge will be accompanied by
large waves.  Surge-related flooding depends on the relative timing
of the surge and the tidal cycle, and can vary greatly over short
distances.  For information specific to your area, please see
products issued by your local National Weather Service forecast

WIND:  Catastrophic wind damage is likely near the core of Ian.
Hurricane conditions are ongoing within the Hurricane Warning area
now and will slowly spread northeastward through the day.

Hurricane conditions are expected to begin along the east coast of
Florida in the Hurricane Warning area starting early Thursday.
Hurricane conditions are possible in the Hurricane Watch area on
Thursday through late Friday.

Tropical storm conditions are occuring in parts of the warning area
on the east coast of Florida and should spread northward through
the northeast Florida, Georgia and South Carolina coasts tonight
and Thursday.  Tropical storm conditions are possible in the
Tropical Storm Watch area starting on Friday.

RAINFALL: Ian is expected to produce the following storm total

* Florida Keys and South Florida: 6 to 8 inches, with local maxima
up to 12 inches.
* Central and Northeast Florida: 12 to 20 inches, with local
maxima up to 30 inches.
* Coastal Georgia and Lowcountry of South Carolina: 4 to 8 inches,
with local maxima of 12 inches.
* Eastern Georgia and Coastal South Carolina: 3 to 6 inches, with
local maxima of 8 inches across western North Carolina

Widespread, life-threatening catastrophic flash and urban flooding,
with major to record flooding along rivers, is expected to continue
across central Florida.  Widespread considerable flash, urban, and
river flooding is expected across portions of northeast Florida,
southeastern Georgia, and eastern South Carolina later this week
through the weekend.  Locally considerable flash flooding, urban,
and river flooding is possible this weekend across portions of the
southern Appalachians with limited flooding possible across portions
of southern Mid-Atlantic.

TORNADOES: A few tornadoes are possible this evening into tonight
across east central Florida.

SURF:  Swells generated by Ian are affecting the northern coast
of Cuba, the northeastern coast of the Yucatan peninsula and
west coast of Florida. Swells will increase along the east coast of
Florida, Georgia, and South Carolina tonight and Thursday.  These
swells are likely to cause life-threatening surf and rip current
conditions. Please consult products from your local weather office.

Next intermediate advisory at 800 PM EDT.
Next complete advisory at 1100 PM EDT.

Forecaster Blake

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Coastal Watches/Warnings and Forecast Cone for Storm Center

cone graphic

* If the storm is forecast to dissipate within 3 days, the “Full Forecast” and “3 day” graphic will be identical

Click Here for a 5-day Cone Printer Friendly Graphic

How to use the cone graphic (video):

Link to video describing cone graphic

About this product:

This graphic shows an approximate representation of coastal areas under a hurricane warning (red), hurricane watch (pink),
tropical storm warning (blue) and tropical storm watch (yellow). The orange circle indicates the current position of the
center of the tropical cyclone. The black line, when selected, and dots show the National Hurricane Center (NHC) forecast track of the center
at the times indicated. The dot indicating the forecast center location will be black if the cyclone is forecast to be
tropical and will be white with a black outline if the cyclone is forecast to be extratropical. If only an L is displayed,
then the system is forecast to be a remnant low. The letter inside the dot indicates the NHC’s forecast intensity for that time:

D: Tropical Depression – wind speed less than 39 MPH
S: Tropical Storm – wind speed between 39 MPH and 73 MPH
H: Hurricane – wind speed between 74 MPH and 110 MPH
M: Major Hurricane – wind speed greater than 110 MPH

NHC tropical cyclone forecast tracks can be in error. This forecast
uncertainty is conveyed by the track forecast “cone”, the solid white
and stippled white areas in the graphic. The solid white area depicts
the track forecast uncertainty for days 1-3 of the forecast, while the
stippled area depicts the uncertainty on days 4-5. Historical data
indicate that the entire 5-day path of the center of the tropical
cyclone will remain within the cone about 60-70% of the time. To
form the cone, a set of imaginary circles are placed along the
forecast track at the 12, 24, 36, 48, 72, 96, and 120 h positions,
where the size of each circle is set so that it encloses 67% of the
previous five years official forecast errors. The cone is then formed
by smoothly connecting the area swept out by the set of circles.

It is also important to realize that a tropical cyclone is not a point. Their
effects can span many hundreds of miles from the center. The area
experiencing hurricane force (one-minute average wind speeds of at least
74 mph) and tropical storm force (one-minute average wind speeds of
39-73 mph) winds can extend well beyond the white areas shown enclosing
the most likely track area of the center. The distribution of hurricane
and tropical storm force winds in this tropical cyclone can be seen in
the Wind History graphic linked above.

Considering the combined forecast uncertainties in track, intensity, and size, the
chances that any particular location will experience winds of 34 kt (tropical storm force),
50 kt, or 64 kt (hurricane force) from this tropical cyclone are presented in

tabular form for selected locations and forecast positions
. This information is also presented in
graphical form for the 34 kt, 50 kt,
and 64 kt thresholds.

Note:  A detailed definition of the NHC track forecast cone is also available.

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Hurricane Fiona Forecast Discussion

WTNT42 KNHC 202057

Hurricane Fiona Discussion Number  26
NWS National Hurricane Center Miami FL       AL072022
500 PM EDT Tue Sep 20 2022

Deep convection around Fiona's eye is intense, but is in a rather 
asymmetrical pattern at this time.  Upper-tropospheric outflow 
remains somewhat restricted over the western semicircle of the 
system.  The last Air Force Hurricane Hunter fix in the 
center of the hurricane around 17Z showed a slight fall of 
central pressure from earlier in the day, but the flight-level and 
SFMR-observed surface winds indicated that the maximum winds were 
still near 100 kt.  This is also in agreement with the latest 
Dvorak satellite estimates from TAFB and SAB.  Another Air Force 
Hurricane Hunter mission into Fiona is scheduled for 00Z to see if 
Fiona is strengthening again.

Vertical wind shear over Fiona, as diagnosed by the SHIPS model, is 
predicted to remain moderate for the next few days.  However, the 
hurricane is likely to remain in a moist unstable air mass and over 
a warm ocean for the next couple of days which is likely to offset 
the influence of shear.  In general, the intensity model guidance 
continues to show strengthening for about the next 48 hours, and so 
does the official forecast.  Fiona is expected to become a category 
4 hurricane in a day or so.  By 96 hours, global model guidance 
indicates that the system will be transformed into a vigorous 
extratropical cyclone near Atlantic Canada.

The hurricane is still headed toward the north-northwest with an 
initial motion estimate of 330/7 kt.  The track forecast scenario 
is generally unchanged from the previous advisory.  Fiona should 
turn northward while moving along the western side of a mid-level 
anticyclone during the next day or so.  In 2-3 days, an intense 
mid-tropospheric trough will be moving off the northeast United 
States coast.  This feature should cause Fiona to accelerate toward 
the north-northeast and northeast during the latter part of the 
forecast period.  The official forecast follows about the same 
trajectory as the previous one, but is just a tad slower.  This is 
in good agreement with both the simple and corrected consensus 

Key Messages:

1.  Heavy rains around the center of Fiona will continue to impact 
the Turks and Caicos through this evening with continued 
life-threatening flooding.  Localized additional flash and urban 
flooding is possible in Puerto Rico and the Dominican Republic.

2. Hurricane conditions are affecting portions of the Turks and
Caicos islands, while tropical storm conditions should affect
portions of the southeastern Bahamas during the next few hours.

3. Tropical storm conditions are possible on Bermuda by late 

4. Fiona is expected to affect portions of Atlantic Canada as a 
powerful hurricane-force cyclone late Friday and Saturday, and could 
produce significant impacts from high winds, storm surge, and heavy 
rainfall. Interests in these areas should closely monitor the 
progress of Fiona and updates to the forecast. 


INIT  20/2100Z 22.6N  71.8W  100 KT 115 MPH
 12H  21/0600Z 23.6N  72.0W  110 KT 125 MPH
 24H  21/1800Z 25.0N  71.9W  115 KT 130 MPH
 36H  22/0600Z 26.9N  71.3W  115 KT 130 MPH
 48H  22/1800Z 29.4N  70.1W  120 KT 140 MPH
 60H  23/0600Z 32.4N  67.8W  115 KT 130 MPH
 72H  23/1800Z 36.9N  63.5W  105 KT 120 MPH
 96H  24/1800Z 46.5N  60.0W   85 KT 100 MPH...POST-TROP/EXTRATROP
120H  25/1800Z 55.0N  58.0W   55 KT  65 MPH...POST-TROP/EXTRATROP

Forecaster Pasch

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