Tropical Storm Nicole Discussion Number 8
NWS National Hurricane Center Miami FL AL172022
1000 PM EST Tue Nov 08 2022
Nicole's satellite appearance has changed little since this
afternoon. Deep convection is not very strong near the center of
the cyclone at this time, and there appears to be some dry air
intrusions into the circulation as evidenced by water vapor
imagery. Nonetheless, wind and central pressure observations from
NOAA and Air Force Hurricane aircraft indicate that the system is
very close to hurricane strength and the current advisory intensity
is set to 60 kt.
Center fixes indicate that the cyclone is moving
west-southwestward, or about 250/9 kt The track forecast
philosophy is basically the same as in the previous advisory
package. Nicole should move west-southwestward to westward, on the
south side of an eastward-moving high pressure area, for the next 24
hours. Thereafter, the system should turn northwestward and then
northward along the western side of the high. In 3-5 days, Nicole
is likely to accelerate northeastward over the eastern United
States, to the east of a large mid-level trough. The track model
guidance has not changed significantly, nor has the official
forecast. This is near the southern edge of the guidance suite for
the next 1-2 days, and roughly in the middle of the guidance
thereafter.
Nicole will be moving over fairly warm SSTs of 27-28 degrees
Celsius during the next day or so. However, the SHIPS guidance
indicates that the vertical shear will be 25 kt or higher, with
low-to mid-tropospheric humidities on the order of 50 percent,
during the next 24 hours. Nicole is likely to become a hurricane
soon but, given the marginal dynamic and thermodynamic environment,
significant strengthening seems unlikely. The official intensity
forecast is near or above the available model guidance, and closely
follows the decay-SHIPS model after landfall. Weakening is expected
after Nicole moves inland over Florida and Georgia and while it
accelerates northeastward over the southeastern United States. The
cyclone should complete extratropical transition by 72 hours and
merge with another extratropical low near Atlantic Canada in 120
hours.