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WTNT32 KNHC 160833
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BULLETIN
TROPICAL STORM KARL ADVISORY NUMBER 8
NWS NATIONAL HURRICANE CENTER MIAMI FL AL122016
500 AM AST FRI SEP 16 2016
...KARL MOVING WESTWARD OVER THE EASTERN TROPICAL ATLANTIC...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...18.3N 33.4W
ABOUT 640 MI...1030 KM WNW OF THE CABO VERDE ISLANDS
ABOUT 1870 MI...3005 KM E OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
At 500 AM AST (0900 UTC), the center of Tropical Storm Karl was
located near latitude 18.3 North, longitude 33.4 West. Karl is
moving toward the west near 13 mph (20 km/h), and this general
motion is expected to continue through Saturday. A west-
southwestward motion is possible Saturday night.
Maximum sustained winds are near 45 mph (75 km/h) with higher gusts.
Little change in strength is forecast during the next 48 hours.
Tropical-storm-force winds extend outward up to 160 miles (260 km)
from the center.
The estimated minimum central pressure is 1005 mb (29.68 inches).
HAZARDS AFFECTING LAND
----------------------
None.
NEXT ADVISORY
-------------
Next complete advisory at 1100 AM AST.
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
TROPICAL STORM KARL DISCUSSION NUMBER 8
NWS NATIONAL HURRICANE CENTER MIAMI FL AL122016
500 AM AST FRI SEP 16 2016
Water vapor satellite imagery indicates that Karl is moving directly
toward the base of a mid-/upper-level trough while being affected by
at least 20 kt of westerly shear. A recent SSMIS microwave pass
showed that the deep convection remains displaced to the northeast
of the center. Since the structure of the cyclone has not changed
since the last advisory, the initial intensity is held at 40 kt.
The SSMIS data indicated that the center has moved a little north of
previous position estimates, and the initial motion is now 280/11
kt. Karl may gain a little more latitude during the next 12-24
hours, but after that time a strong subtropical ridge is expected to
force the cyclone to move south of due west or possibly west-
southwestward between 36-48 hours. Once it reaches the western
portion of the ridge and intensifies, Karl is likely to again gain
some latitude, turning west-northwestward by days 4 and 5. The
track models all agree on this scenario and keep Karl well to the
east and northeast of the Leeward Islands during the five-day
forecast period. Mainly because of the adjustment in the initial
position, the new NHC track forecast is a little north of the
previous forecast, and it lies closest to an average of the GFS and
ECMWF solutions.
Strong to moderate vertical shear is expected to persist for the
next 24-36 hours, and little to no change in strength is anticipated
during that time. Even after 36 hours, Karl will be moving through
a dry environment over the central tropical Atlantic, but lower
shear and warming sea surface temperatures could allow for at least
gradual strengthening. The intensity models have trended a little
bit higher at the end of the forecast period, and the new NHC
forecast shows Karl potentially reaching hurricane intensity by day
5. This forecast is very close to the SHIPS and LGEM models.
The initial 12-ft sea radii have been expanded considerably on this
advisory based on recent altimeter wave height data.
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022
Hurricane’s hit Puerto Rico: San Felipe 1928, San Ciprián 1932, Santa Clara 1956, Hugo 1989, Marilyn 1995, Hortense 1996, Georges 1998, Maria 2017, Fiona 2022