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Tropical Storm Willa Advisory Number 4
NWS National Hurricane Center Miami FL EP242018
900 PM MDT Sat Oct 20 2018
...WILLA ALMOST A HURRICANE...
...EXPECTED TO RAPIDLY INTENSIFY AND BECOME A MAJOR HURRICANE IN A
DAY OR SO...
SUMMARY OF 900 PM MDT...0300 UTC...INFORMATION
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LOCATION...15.7N 106.1W
ABOUT 255 MI...415 KM SSW OF MANZANILLO MEXICO
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 6 MPH...9 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
Interests along the coast of west-central mainland Mexico should
monitor the progress of Willa.
DISCUSSION AND OUTLOOK
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At 900 PM MDT (0300 UTC), the center of Tropical Storm Willa was
located near latitude 15.7 North, longitude 106.1 West. Willa is
moving toward the northwest near 6 mph (9 km/h), and this general
motion is expected to continue through early Sunday. A turn toward
the north-northwest and north is expected by late Sunday and Monday.
Willa is expected to accelerate toward the northeast and approach
the coast of west-central mainland Mexico by late Tuesday.
Maximum sustained winds have increased to near 70 mph (110 km/h)
with higher gusts. Rapid strengthening is forecast during the next
couple of days, and Willa is expected to become a hurricane
overnight and a major hurricane by Monday.
Tropical-storm-force winds extend outward up to 45 miles (75 km)
from the center.
The estimated minimum central pressure is 994 mb (29.36 inches).
HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Willa should begin to affect portions of
the coast of southwestern and west-central Mexico by Monday. These
swells are likely to cause life-threatening surf and rip current
conditions. Please consult products from your local weather office.
NEXT ADVISORY
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Next complete advisory at 300 AM MDT.
$$
Forecaster Cangialosi
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