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BULLETIN
Tropical Storm Norma Advisory Number  20
NWS National Hurricane Center Miami FL       EP172023
900 AM MDT Sun Oct 22 2023
 
...NORMA MOVING NORTH-NORTHEASTWARD ACROSS THE GULF OF CALIFORNIA...
...ONGOING HEAVY RAINFALL AND FLASH FLOOD THREAT TO MAINLAND
MEXICO...
 
 
SUMMARY OF 900 AM MDT...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...24.7N 109.6W
ABOUT 130 MI...210 KM W OF CULIACAN MEXICO
ABOUT 85 MI...135 KM SSW OF LOS MOCHIS MEXICO
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...NNE OR 25 DEGREES AT 5 MPH...7 KM/H
MINIMUM CENTRAL PRESSURE...990 MB...29.24 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Santa Fe to San Evaristo
* Huatabampito to Mazatlan
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
 
Interests elsewhere in Baja California Sur and along the west coast
of mainland Mexico should monitor the progress of Norma.
 
For storm information specific to your area, please monitor
products issued by your national meteorological service.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 900 AM MDT (1500 UTC), the center of Tropical Storm Norma was
located near latitude 24.7 North, longitude 109.6 West. Norma is
moving toward the north-northeast near 5 mph (7 km/h).  A
northeastward motion is expected to begin later this morning,
followed by a turn toward the east-northeast later today and
tonight. On the forecast track, the center of Norma is forecast to
approach the west coast of mainland Mexico today and move inland
within the tropical storm warning area tonight or early Monday.
 
Maximum sustained winds are near 60 mph (95 km/h) with higher gusts.
Little change in strength is forecast today, and Norma is
expected to approach the west coast of mainland Mexico as a tropical
storm. Rapid weakening is anticipated once Norma moves inland over
mainland Mexico.
 
Tropical-storm-force winds extend outward up to 115 miles (185 km)
from the center.
 
The estimated minimum central pressure is 990 mb (29.24 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Norma can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDEP2 and WMO header WTPZ42 KNHC
and on the web at hurricanes.gov/text/MIATCDEP2.shtml
 
WIND:  Tropical storm conditions are ongoing within portions of the
tropical storm warning area in Baja California Sur. Tropical storm
conditions are expected to spread onshore along portions of the
warning area along the west coast of mainland Mexico through
tonight.
 
RAINFALL:  Norma will produce rainfall totals of 6 to 12 inches with
maxima of 18 inches across the southern portion of Baja California
Sur through today and through Sinaloa into Monday.  These rains
will produce flash and urban flooding, along with mudslides in areas
of higher terrain.
 
STORM SURGE:  Coastal flooding along the coast of Baja California
Sur should gradually subside today. Coastal flooding is possible
along the west coast of mainland Mexico within the tropical storm
warning area. Near the coast, the coastal flooding will be
accompanied by large and dangerous waves.
 
SURF:  Swells generated by Norma will continue to affect the coast
of southwestern and west-central Mexico and Baja California Sur for
the next day or two. These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 1200 PM MDT.
Next complete advisory at 300 PM MDT.
 
$$
Forecaster Bucci
 
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