748
WTPA41 PHFO 050910
TCDCP1
TROPICAL STORM LESTER DISCUSSION NUMBER 47
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP132016
1100 PM HST SUN SEP 04 2016
Lester was completely devoid of deep convection at 0600 UTC.
However, small pockets of cumulonimbus clouds have redeveloped in
the northwestern semicircle during the past couple of hours. Cloud
tops of the thunderstorms are estimated to be near 36 thousand feet.
Strong southwesterly vertical wind shear and cooler ocean
temperatures are likely the main contributers of Lester's weakening
trend. The latest subjective Dvorak satellite intensity estimates
are 2.5/35 kt from PHFO and SAB, while JTWC indicated Lester was no
longer classifiable. The latest CIMSS ADT estimate is also 2.5/35
kt. Based on the current appearance of Lester in satellite imagery
and these intensity estimates, we have lowered the initial intensity
to 40 kt for this advisory.
The initial motion for this advisory is 320/16 kt. The latest track
guidance remains tightly clustered, taking Lester along a
northwestward path through the next 24 hours, followed by gradual
slowing and a northward turn during the 36 to 48 hour time frame.
Lester is then forecast to accelerate northeast from days 3 through
4, followed by absorption by a larger extratropical system on day 5.
Lester is currently being steered by the subtropical ridge located
northeast of the system and an upper level trough located to the
west. The latest forecast track closely follows the previous one,
and lies close to the IVCN and GFEX consensus guidance. The Ocean
Prediction Center provided input for the 72 and 96 hour positions.
Most of the intensity guidance indicates that the tropical cyclone
will remain near its current intensity through 72 hours, with slow
weakening by day 4. The latest intensity forecast follows along with
this, keeping the system at it present intensity through day 3.
Beyond 48 hours, Lester is forecast to transition to an
extra-tropical gale low over the North Pacific Ocean in around 72
hours. This intensity forecast closely follows the latest SHIPS and
the IVCN consensus guidance.
FORECAST POSITIONS AND MAX WINDS
INIT 05/0900Z 27.9N 162.6W 40 KT 45 MPH
12H 05/1800Z 29.4N 164.1W 40 KT 45 MPH
24H 06/0600Z 31.4N 165.4W 40 KT 45 MPH
36H 06/1800Z 33.3N 165.9W 40 KT 45 MPH
48H 07/0600Z 35.4N 165.4W 40 KT 45 MPH
72H 08/0600Z 41.5N 162.0W 40 KT 45 MPH...POST-TROP/EXTRATROP
96H 09/0600Z 48.0N 148.0W 35 KT 40 MPH...POST-TROP/EXTRATROP
120H 10/0600Z...DISSIPATED
$$
Forecaster Houston
Return to the Tropical Systems Page for LESTER
Back to main Tropical Weather page
This page is maintained voluntarily by the MKWC and the UHMET faculty, staff, and students.
It was last modified on: Thu, Jul 23 2020 - 2003 UTC
Send comments to: Ryan Lyman
|