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BULLETIN
Tropical Storm Norma Intermediate Advisory Number 20A
NWS National Hurricane Center Miami FL       EP172023
1200 PM MDT Sun Oct 22 2023
 
...NORMA MOVING NORTHEASTWARD ACROSS THE GULF OF CALIFORNIA...
...ONGOING HEAVY RAINFALL AND FLASH FLOOD THREAT TO MAINLAND
MEXICO...
 
 
SUMMARY OF 1200 PM MDT...1800 UTC...INFORMATION
-----------------------------------------------
LOCATION...24.9N 109.4W
ABOUT 120 MI...195 KM W OF CULIACAN MEXICO
ABOUT 65 MI...105 KM SSW OF LOS MOCHIS MEXICO
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...NE OR 35 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 1200 PM MDT (1800 UTC), the center of Tropical Storm Norma was 
located near latitude 24.9 North, longitude 109.4 West. Norma is 
moving toward the northeast near 5 mph (7 km/h).  A turn toward the 
east-northeast is expected 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 and mainland 
Mexico.
 
RAINFALL:  Norma will produce rainfall totals of 6 to 12 inches with 
maxima of 18 inches across 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 complete advisory at 300 PM MDT.
 
$$
Forecaster Bucci
 
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