ZCZC MIATCDEP4 ALL
TTAA00 KNHC DDHHMM
Hurricane Bonnie Discussion Number 27
NWS National Hurricane Center Miami FL EP042022
400 AM CDT Mon Jul 04 2022
The satellite presentation of Bonnie is less organized than last
night. The hurricane is still contending with some deep-layer
northeasterly shear, as evidenced by the sharp cloud edge noted on
the upshear side of its circulation. Additionally, the ragged eye
previously seen in infrared imagery degraded overnight, and the
inner core convection has been reduced to a curved convective band
that wraps around the eastern and southern portions of the center.
There are no recent microwave or scatterometer data available to
better assess changes in Bonnie's structure this morning. The latest
objective and subjective intensity estimates range from 53 to 77 kt,
and the initial intensity is held at a possibly generous 70 kt.
Despite the presence of 10-15 kt of deep-layer shear over Bonnie,
the hurricane still has a window to strengthen during the next
couple of days. Bonnie is expected to remain within a moist
mid-level environment over very warm SSTs through Wednesday, and the
majority of the intensity guidance still supports some strengthening
within these favorable environmental conditions. However, rapid
intensification appears somewhat less likely based on decreasing
values in the latest SHIPS RI and DTOPS indices. The official NHC
intensity forecast is slightly lower than the previous one, but
still lies on the high end of the guidance during the first 48 h,
closest to the DSHP and LGEM aids. Thereafter, the intensity is
forecast to level off and eventually weaken as the system moves into
a drier environment over cooler SSTs. The latter half of the NHC
forecast trends closer to the multi-model consensus.
The initial motion of Bonnie is estimated to be west-northwestward,
or 285/16 kt. There are no changes to the track forecast reasoning.
Bonnie is expected to continue moving generally west-northwestward
for the next couple of days, roughly parallel to but well offshore
the coasts of southern and southwestern Mexico. The latest NHC track
forecast is basically an update of the previous one, and it remains
close to the TVCE consensus aid. This forecast track keeps
tropical-storm-force winds associated with Bonnie offshore the coast
of southern and southwestern Mexico, but coastal locations can still
expect rough surf and the potential for rip currents today and
Tuesday as Bonnie passes offshore.
FORECAST POSITIONS AND MAX WINDS
INIT 04/0900Z 13.6N 97.3W 70 KT 80 MPH
12H 04/1800Z 14.3N 99.3W 80 KT 90 MPH
24H 05/0600Z 15.1N 102.2W 85 KT 100 MPH
36H 05/1800Z 15.8N 104.8W 90 KT 105 MPH
48H 06/0600Z 16.2N 107.2W 90 KT 105 MPH
60H 06/1800Z 16.4N 109.3W 90 KT 105 MPH
72H 07/0600Z 16.6N 111.4W 85 KT 100 MPH
96H 08/0600Z 17.5N 116.0W 80 KT 90 MPH
120H 09/0600Z 19.0N 122.0W 70 KT 80 MPH
$$
Forecaster Reinhart
NNNN