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BULLETIN
Hurricane John Advisory Number  12
NWS National Hurricane Center Miami FL       EP122018
900 AM MDT Wed Aug 08 2018

...OUTER BANDS OF LARGE HURRICANE JOHN PRODUCING LOCALLY HEAVY
RAINFALL OVER SOUTHERN BAJA CALIFORNIA...


SUMMARY OF 900 AM MDT...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...20.7N 112.3W
ABOUT 215 MI...350 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...NW OR 320 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...979 MB...28.91 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.

Interests in the southern portion of the Baja California peninsula
should monitor the progress of John due to locally heavy rainfall.


DISCUSSION AND OUTLOOK
----------------------
At 900 AM MDT (1500 UTC), the center of Hurricane John was located
near latitude 20.7 North, longitude 112.3 West. John is moving
toward the northwest near 12 mph (19 km/h), and this general motion
is expected to continue through Thursday.  A turn toward the
west-northwest is expected by Friday.  On the forecast track, the
center of John will pass well to the southwest of Baja California
Sur today through Thursday.

Maximum sustained winds have decreased to near 85 mph (140 km/h)
with higher gusts.  Weakening is forecast during the next few days,
and John is expected to become a tropical storm on Thursday, and
degenerate into a remnant low late Friday or early Saturday.

Hurricane-force winds extend outward up to 30 miles (45 km) from the
center and tropical-storm-force winds extend outward up to 115 miles
(185 km).

The estimated minimum central pressure is 979 mb (28.91 inches).


HAZARDS AFFECTING LAND
----------------------
RAINFALL:  John is expected to produce total rain accumulations of
1 to 2 inches over far southern Baja California Sur, with isolated
maximum amounts of 3 inches through Thursday.

SURF:  Swells generated by John are affecting portions of the
coasts of southwestern Mexico and the southern portion of the Baja
California peninsula and will spread northward along the west coast
of the Baja California peninsula during the next couple of days.
The swells are forecast to reach the coast of southern California
by late Thursday.  These swells are likely to cause life-threatening
surf and rip current conditions.  Please consult products from your
local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 300 PM MDT.

$$
Forecaster Brown

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