HURRICANE LESTER DISCUSSION NUMBER 26
NWS NATIONAL HURRICANE CENTER MIAMI FL EP132016
800 PM PDT TUE AUG 30 2016
Lester has shown a sudden reintensification this evening as a
symmetric eyewall with very cold cloud tops is encircling a 25 nm
diameter warm eye. Subjective Dvorak classifications from SAB and
TAFB are at 6.5 and 6.0 current intensity numbers, respectively,
while the CIMSS Advanced Dvorak Technique is at 6.3. A blend of
these gives 120 kt maximum winds at the initial time, up
considerably from the previous advisory.
Lester is anticipated to experience quite low vertical shear for
the next few days, though the lukewarm SSTs and 40-50 percent
humidity air are only marginally conducive for maintaining high
intensities. The current convective structure and its environment
suggest that Lester may be evolving into an annular hurricane,
which tends to weaken only slowly over time. The NHC intensity
forecast is closest to the HWRF and DSHP models, and is above that
from the previous advisory due to the higher initial intensity.
Lester is moving toward the west-southwest at about 11 kt. A large
subtropical ridge to its north is providing the westward steering
and low shear environment. The tightly packed model guidance
indicate that the system should turn slightly toward the west or
west-northwest during the next two days at about the same rate of
forward speed. The NHC track forecast is based upon the TVCN
multi-model consensus technique and is very close to that from the
previous advisory.
No new information is available about Lester's initial wind radii,
so that is unchanged from the previous advisory. The NHC wind radii
forecast is based upon the RVCN consensus technique and nearly
the same as that from the last advisory.
提升卡
千斤頂
